AbdulWasiq: Linux/Unix

How to find Operting System is 32 bit or 64 bit?

1)Linux

# uname -m

i386 or i686 then it is 32 bit
x86_64 is 64bit

Note: Using ” uname -a ” (or -m for short) only shows the type of kernel that is running.

A 32 bit kernel ( i386, i586, i686 ) can be run on a 64 bit capable CPU.

A 64 bit kernel ( x86_64 ) requires a 64 bit capable CPU to run.

[root@localhost ~]# uname -m
i686

[root@localhost ~]# file /usr/bin/file
/usr/bin/file: ELF 32-bit LSB executable, Intel 80386, version 1 (SYSV), for GNU/Linux 2.6.9, dynamically linked (uses shared libs), for GNU/Linux 2.6.9, stripped
[root@localhost ~]# getconf LONG_BIT
32
[root@localhost ~]# uname -ar
Linux localhost.localdomain 2.6.18-194.el5PAE #1 SMP Mon Mar 29 20:19:03 EDT 2010 i686 i686 i386 GNU/Linux

[root@localhost ~]# file /sbin/init
/sbin/init: ELF 32-bit LSB executable, Intel 80386, version 1 (SYSV), for GNU/Linux 2.6.9, dynamically linked (uses shared libs), for GNU/Linux 2.6.9, stripped

[root@localhost ~]# getconf WORD_BIT
32

2)Sunsolaris

isainfo -v

How to find the number of cpu ?

1)Linux

[root@apps u02]# cat /proc/cpuinfo |grep -i processor|wc -l
4
[root@apps u02]#

[root@apps ~]# grep -c /proc/cpuinfo -e "CPU"
4
[root@apps ~]#

top ===> press numeric 1 and observe cpu column.

top - 08:48:31 up 6:51, 2 users, load average: 0.11, 0.03, 0.01
Tasks: 121 total, 1 running, 119 sleeping, 0 stopped, 1 zombie
Cpu0 : 0.3% us, 0.7% sy, 0.0% ni, 99.0% id, 0.0% wa, 0.0% hi, 0.0% si
Cpu1 : 1.7% us, 2.4% sy, 0.0% ni, 95.9% id, 0.0% wa, 0.0% hi, 0.0% si
Cpu2 : 3.4% us, 1.7% sy, 0.0% ni, 94.9% id, 0.0% wa, 0.0% hi, 0.0% si
Cpu3 : 0.0% us, 0.3% sy, 0.0% ni, 99.7% id, 0.0% wa, 0.0% hi, 0.0% si
Mem: 7225436k total, 1931064k used, 5294372k free, 94796k buffers
Swap: 15358100k total, 0k used, 15358100k free, 1645644k cached

[root@localhost ~]# cd /sys/devices/system/cpu
[root@localhost cpu]# ls -ltrh
total 0
drwxr-xr-x 4 root root 0 Jan 31 19:33 cpu3
drwxr-xr-x 4 root root 0 Jan 31 19:33 cpu2
drwxr-xr-x 4 root root 0 Jan 31 19:33 cpu1
drwxr-xr-x 4 root root 0 Jan 31 19:33 cpu0
[root@localhost cpu]#

$ cat /proc/cpuinfo | grep "^physical id" | sort | uniq | wc -l
2

To find the number of cores per CPU:

$ cat /proc/cpuinfo | grep "^cpu cores" | uniq
cpu cores : 4

The total number of processors available is the number of physical CPUs multiplied by the number of cores per CPU.

To find the total number of processors:

$ cat /proc/cpuinfo | grep "^processor" | wc -l
16

2) Sunsolaris

# /usr/platform/sun4u/sbin/prtdiag -v

Uname -x

psrinfo | grep on-line | wc -l

6

To check the RAM size in linux.

dmesg | grep RAM

There are three another way to check memory on Linux

1:- free -t -m
2: vmstat
3: top

Other commands for RAM :

cat /proc/meminfo

$ vmstat

$ vmstat -s

# dmidecode --type memory

Sunsolaris

# prtconf | grep Memory

If you want the CPU speed(s) only:
# psrinfo -v

To find only directories in Linux/Sunsolaris?

[root@apps u01]# ls -ltrh|grep -i ^d
drwxr-xr-x 4 oracle dba 4.0K Feb 7 16:19 db
drwxr-xr-x 3 oracle dba 4.0K Feb 7 17:01 oradiag_oracle
drwxrwxrwx 2 oracle dba 16K Feb 7 19:12 lost+found
[root@apps u01]#

To find operating system version?

[root@apps etc]# ls -tlrh /etc/redhat-release
-rw-r--r-- 1 root root 66 Nov 21 2007 /etc/redhat-release

[root@apps etc]# cat /etc/redhat-release
Enterprise Linux Enterprise Linux AS release 4 (October Update 6)
[root@apps etc]#

[root@apps etc]# ls -tlrh /proc/version
-r--r--r-- 1 root root 0 Feb 12 08:58 /proc/version

[root@apps etc]# cat /proc/version
Linux version 2.6.9-67.0.0.0.1.ELhugemem (mockbuild@ca-build15.us.oracle.com) (gcc version 3.4.6 20060404 (Red Hat 3.4.6-3)) #1 SMP Sun Nov 18 00:31:12 EST 2007
[root@apps etc]#

To find the trc files which are older than 30 days?

[oracle@apps trace]$ find . -name "*.trc" -mtime +30 -exec ls -ltrh {} \;

-rw-r----- 1 oracle dba 914 Nov 8 2008 ./R1211DB1_dbrm_21512.trc
-rw-r----- 1 oracle dba 1.3K Nov 8 2008 ./R1211DB1_vktm_21506.trc
-rw-r----- 1 oracle dba 12K Nov 8 2008 ./R1211DB1_ora_21500.trc
[oracle@apps trace]$ date
Tue Feb 12 09:25:47 IST 2013
[oracle@apps trace]$

To delete the trace files older than 30 days.?

find . -name "*.trc" -mtime +30 -exec rm {} \;

To find the files more than 200MB.?

[oracle@apps ~]$ find . -name "*" -size +500000 -exec ls -ltrh {} \;
-rw-r--r-- 1 oracle dba 257M Jun 6 2007 ./db/tech_st/11.1.0/md/demo/SampleData/sample_data.zip-rw-r----- 1 oracle dba 1.4G Feb 11 23:03 ./db/apps_st/data/a_txn_data01.dbf
-rw-r----- 1 oracle dba 1.5G Feb 11 23:00 ./db/apps_st/data/a_ref01.dbf
-rw-r--r-- 1 oracle dba 1014M Feb 12 08:52 ./db/apps_st/data/system01.dbf
-rw-r----- 1 oracle dba 1.3G Feb 11 23:00 ./db/apps_st/data/system12.dbf
-rw-r----- 1 oracle dba 1.2G Feb 11 23:03 ./db/apps_st/data/a_txn_ind03.dbf
-rw-r----- 1 oracle dba 1.8G Feb 12 09:02 ./db/apps_st/data/undo01.dbf
-rw-r----- 1 oracle dba 311M Feb 11 22:59 ./db/apps_st/data/a_ref03.dbf
-rw-r----- 1 oracle dba 1.6G Feb 11 23:05 ./db/apps_st/data/a_txn_ind02.dbf
-rw-r----- 1 oracle dba 867M Feb 11 22:59 ./db/apps_st/data/a_archive01.dbf
-rw-r----- 1 oracle dba 1.2G Feb 11 22:59 ./db/apps_st/data/a_ref02.dbf

To find the req/out/log files which are more than 10Mb.

find . -name "*.req" -size +10000000c -exec ls -ltrh {} \;

find . -name "*.out" -size +10000000c -exec ls -ltrh {} \;

Default block size in Linux

If you ever want to confirm the block size of any filesystem of any other Linux OS.

[root@apps ~]# tune2fs -l /dev/sda1 | grep Block

Block count: 3839527

Block size: 4096

Blocks per group: 32768

From this example, you can see that the default block size for the filesystem on /dev/sda1 partition is 4096 bytes, or 4k. That's the default block size for ext3 filesystem.

Confirm current filesystem parameters with tune2fs

The tunefs -l command will show you all the information contained in a filesystem's superblock. Here's how it typically looks:

[root@apps u02]# tune2fs -l /dev/sda1
tune2fs 1.35 (28-Feb-2004)
Filesystem volume name: /
Last mounted on: <not available>
Filesystem UUID: 45049a3c-9cf6-412b-9b99-cc33f7156afd
Filesystem magic number: 0xEF53
Filesystem revision #: 1 (dynamic)
Filesystem features: has_journal ext_attr resize_inode dir_index filetype needs_recovery sparse_super large_file
Default mount options: (none)
Filesystem state: clean
Errors behavior: Continue
Filesystem OS type: Linux
Inode count: 1921984
Block count: 3839527
Reserved block count: 191976
Free blocks: 1876714
Free inodes: 1591443
First block: 0
Block size: 4096
Fragment size: 4096
Reserved GDT blocks: 937
Blocks per group: 32768
Fragments per group: 32768
Inodes per group: 16288
Inode blocks per group: 509
Filesystem created: Thu Feb 7 19:12:04 2013
Last mount time: Mon Feb 11 16:49:24 2013
Last write time: Mon Feb 11 16:49:24 2013
Mount count: 6
Maximum mount count: -1
Last checked: Thu Feb 7 19:12:04 2013
Check interval: 0 (<none>)
Reserved blocks uid: 0 (user root)
Reserved blocks gid: 0 (group root)
First inode: 11
Inode size: 128
Journal inode: 8
Default directory hash: tea
Directory Hash Seed: 360cd96b-5270-4f22-8284-02a66dc38a1d
Journal backup: inode blocks
[root@apps u02]#

Creating 0 bytes (empty) files using touch command.

syntax: touch <filename>

[root@apps u02]# touch file1 file2 file3
[root@apps u02]# ls -ld file*
-rw-r--r-- 1 root root 0 Feb 12 10:04 file1
-rw-r--r-- 1 root root 0 Feb 12 10:04 file2
-rw-r--r-- 1 root root 0 Feb 12 10:04 file3
[root@apps u02]#

[root@apps u02]# date

Tue Feb 12 10:06:28 IST 2013

[root@apps u02]#

To change the the timestamp (date and time of modification) of a file or directory.

syntax:

touch <options> <argument> <file or directory>

touch -t YYYYMMDDhhmm <file or directory>

Example:

[root@apps u02]# date
Tue Feb 12 10:15:41 IST 2013
[root@apps u02]# ls -ld file*
-rw-r--r-- 1 root root 0 Feb 12 10:04 file1
-rw-r--r-- 1 root root 0 Feb 12 10:04 file2
-rw-r--r-- 1 root root 0 Feb 12 10:04 file3
[root@apps u02]# touch -t 201302121016 file*
[root@apps u02]# ls -ld file*
-rw-r--r-- 1 root root 0 Feb 12 10:16 file1
-rw-r--r-- 1 root root 0 Feb 12 10:16 file2
-rw-r--r-- 1 root root 0 Feb 12 10:16 file3
[root@apps u02]# date
Tue Feb 12 10:16:53 IST 2013
[root@apps u02]#

User Administration=============

creating an user

syntax:- useradd <options> <arguments> <username>

-u UID -g primary grou GUID

-c comment -d home directory

-G secondary group -s shell

-o override

1) creating a user prakash with default options.

root@apps u02]# useradd prakash

to check user has been created.

[root@apps u02]# tail -f /etc/passwd

amanda:x:33:6:Amanda user:/var/lib/amanda:/bin/bash

radiusd:x:95:95:radiusd user:/:/bin/false

ldap:x:55:55:LDAP User:/var/lib/ldap:/bin/false

radvd:x:75:75:radvd user:/:/sbin/nologin

postgres:x:26:26:PostgreSQL Server:/var/lib/pgsql:/bin/bash

fax:x:78:78:mgetty fax spool user:/var/spool/fax:/sbin/nologin

oracle:x:500:500::/u01:/bin/bash

applmgr:x:501:500::/u02:/bin/bash

ali:x:914:914:associate:/home:/bin/csh

prakash:x:915:915::/home/prakash:/bin/bash

2) create a user ali with the following parameters.

1)userid 914

2)comment assocaite

3)home directory /home

4)shell cshell

[root@apps u02]# useradd -u 914 -c associate -d /home -s /bin/csh ali

[root@apps u02]# tail -f /etc/passwd

mysql:x:27:27:MySQL Server:/var/lib/mysql:/bin/bash

amanda:x:33:6:Amanda user:/var/lib/amanda:/bin/bash

radiusd:x:95:95:radiusd user:/:/bin/false

ldap:x:55:55:LDAP User:/var/lib/ldap:/bin/false

radvd:x:75:75:radvd user:/:/sbin/nologin

postgres:x:26:26:PostgreSQL Server:/var/lib/pgsql:/bin/bash

fax:x:78:78:mgetty fax spool user:/var/spool/fax:/sbin/nologin

oracle:x:500:500::/u01:/bin/bash

applmgr:x:501:500::/u02:/bin/bash

ali:x:914:914:associate:/home:/bin/csh

To modify the properties of a user.

============================

syntax:- usermod <options> <arguments> <username>

-u UID -g primary grou GUID

-c comment -d home directory

-G secondary group -s shell

-o override -l login name

-L lock the account -U unlock the account

1) change userid of ali 750

[root@apps u02]# usermod -u 750 ali

[root@apps u02]#

[root@apps u02]# grep -i ali /etc/passwd

webalizer:x:67:67:Webalizer:/var/www/usage:/sbin/nologin

ali:x:750:914:associate:/home:/bin/csh

[root@apps u02]#

2)Lock the account of tom.

[root@apps u02]# usermod -L tom

to check logoff as root and login as tom.

3)To unlock the account of tom.

[root@apps u02]# usermod -U tom

to check logoff as root and login as tom.

4) to change the login name of user tom to jack.

[root@apps u02]# usermod -l jack tom

To delete a user============

1)delete user raj.

[root@apps u02]# userdel raj

[root@apps home]# ls /home

prakash raj tom

[root@apps home]#

2)Delete the user jack along with his home directory and mailbox.

[root@apps home]# ls /home

prakash raj tom

[root@apps home]# userdel -r jack

[root@apps home]# ls /home

prakash raj

[root@apps home]#

Creating a group
===========

groupadd <groupname>

groupadd <options> <argumetn> <groupname>

1)creating a group dba1 whose group id 751.

[root@apps home]# groupadd -g 751 dba1

Modifying the properties of a group.

=============================

1)change the groupid of dba1 to 800

[root@apps home]# groupmod -g 800 dba1

2)Changing the groupname of dba1 to db.

[root@apps home]# groupmod -n db dba1

Deleting the group db.

================

1)delete the group db.

[root@apps home]# groupdel db

[root@apps home]#

####################################################

To view how long the system is running.

[root@apps home]# uptime
11:30:47 up 9:34, 3 users, load average: 1.10, 1.10, 1.07
[root@apps home]#

============================================

To find out hardware details.

[root@apps ~]# lspci
00:00.0 Host bridge: Intel Corporation 440BX/ZX/DX - 82443BX/ZX/DX Host bridge (rev 01)
00:01.0 PCI bridge: Intel Corporation 440BX/ZX/DX - 82443BX/ZX/DX AGP bridge (rev 01)
00:07.0 ISA bridge: Intel Corporation 82371AB/EB/MB PIIX4 ISA (rev 08)
00:07.1 IDE interface: Intel Corporation 82371AB/EB/MB PIIX4 IDE (rev 01)
00:07.3 Bridge: Intel Corporation 82371AB/EB/MB PIIX4 ACPI (rev 08)
00:07.7 System peripheral: VMware Inc: Unknown device 0740 (rev 10)
00:0f.0 VGA compatible controller: VMware Inc [VMware SVGA II] PCI Display Adapter
00:10.0 SCSI storage controller: LSI Logic / Symbios Logic 53c1030 PCI-X Fusion-MPT Dual Ultra320 SCSI (rev 01)
00:11.0 PCI bridge: VMware Inc: Unknown device 0790 (rev 02)
00:15.0 PCI bridge: VMware Inc: Unknown device 07a0 (rev 01)
00:15.1 PCI bridge: VMware Inc: Unknown device 07a0 (rev 01)
00:15.2 PCI bridge: VMware Inc: Unknown device 07a0 (rev 01)
00:15.3 PCI bridge: VMware Inc: Unknown device 07a0 (rev 01)
00:15.4 PCI bridge: VMware Inc: Unknown device 07a0 (rev 01)
00:15.5 PCI bridge: VMware Inc: Unknown device 07a0 (rev 01)
00:15.6 PCI bridge: VMware Inc: Unknown device 07a0 (rev 01)
00:15.7 PCI bridge: VMware Inc: Unknown device 07a0 (rev 01)
00:16.0 PCI bridge: VMware Inc: Unknown device 07a0 (rev 01)
00:16.1 PCI bridge: VMware Inc: Unknown device 07a0 (rev 01)
00:16.2 PCI bridge: VMware Inc: Unknown device 07a0 (rev 01)
00:16.3 PCI bridge: VMware Inc: Unknown device 07a0 (rev 01)
00:16.4 PCI bridge: VMware Inc: Unknown device 07a0 (rev 01)
00:16.5 PCI bridge: VMware Inc: Unknown device 07a0 (rev 01)
00:16.6 PCI bridge: VMware Inc: Unknown device 07a0 (rev 01)
00:16.7 PCI bridge: VMware Inc: Unknown device 07a0 (rev 01)
00:17.0 PCI bridge: VMware Inc: Unknown device 07a0 (rev 01)
00:17.1 PCI bridge: VMware Inc: Unknown device 07a0 (rev 01)
00:17.2 PCI bridge: VMware Inc: Unknown device 07a0 (rev 01)
00:17.3 PCI bridge: VMware Inc: Unknown device 07a0 (rev 01)
00:17.4 PCI bridge: VMware Inc: Unknown device 07a0 (rev 01)
00:17.5 PCI bridge: VMware Inc: Unknown device 07a0 (rev 01)
00:17.6 PCI bridge: VMware Inc: Unknown device 07a0 (rev 01)
00:17.7 PCI bridge: VMware Inc: Unknown device 07a0 (rev 01)
00:18.0 PCI bridge: VMware Inc: Unknown device 07a0 (rev 01)
00:18.1 PCI bridge: VMware Inc: Unknown device 07a0 (rev 01)
00:18.2 PCI bridge: VMware Inc: Unknown device 07a0 (rev 01)
00:18.3 PCI bridge: VMware Inc: Unknown device 07a0 (rev 01)
00:18.4 PCI bridge: VMware Inc: Unknown device 07a0 (rev 01)
00:18.5 PCI bridge: VMware Inc: Unknown device 07a0 (rev 01)
00:18.6 PCI bridge: VMware Inc: Unknown device 07a0 (rev 01)
00:18.7 PCI bridge: VMware Inc: Unknown device 07a0 (rev 01)
02:00.0 USB Controller: VMware Inc: Unknown device 0774
02:01.0 Ethernet controller: Advanced Micro Devices [AMD] 79c970 [PCnet32 LANCE] (rev 10)
02:02.0 Multimedia audio controller: Ensoniq ES1371 [AudioPCI-97] (rev 02)
02:03.0 USB Controller: VMware Inc: Unknown device 0770
[root@apps ~]#

dmesg|less

=========================

Highlighting the running process in Linux use b/z.

===================================================
To see absolute path of a command use c.

=====================================================================

To display limited process use 'n' in top command.

===================================

To display memory information for a particular process id use below command.

[root@apps ~]# pmap -d 26764

26764: cp -r db /u02

Address Kbytes Mode Offset Device Mapping

00696000 88 r-x-- 0000000000000000 008:00001 ld-2.3.4.so

006ac000 4 r---- 0000000000015000 008:00001 ld-2.3.4.so

006ad000 4 rw--- 0000000000016000 008:00001 ld-2.3.4.so

006b5000 1176 r-x-- 0000000000000000 008:00001 libc-2.3.4.so

007db000 8 r---- 0000000000125000 008:00001 libc-2.3.4.so

007dd000 8 rw--- 0000000000127000 008:00001 libc-2.3.4.so

007df000 8 rw--- 00000000007df000 000:00000 [ anon ]

009f9000 4 r-x-- 0000000000000000 008:00001 libcwait.so

009fa000 4 rw--- 0000000000000000 008:00001 libcwait.so

00acb000 52 r-x-- 0000000000000000 008:00001 libselinux.so.1

00ad8000 4 rw--- 000000000000d000 008:00001 libselinux.so.1

08048000 52 r-x-- 0000000000000000 008:00001 cp

08055000 8 rw--- 000000000000c000 008:00001 cp

09d6c000 1720 rw--- 0000000009d6c000 000:00000 [ anon ]

f6dc8000 2048 r---- 0000000000000000 008:00001 locale-archive

f6fc8000 8 rw--- 00000000f6fc8000 000:00000 [ anon ]

fef5d000 652 rw--- 00000000fef5d000 000:00000 [ stack ]

ffffe000 4 r-x-- 0000000000000000 000:00000 [ anon ]

mapped: 5852K writeable/private: 2416K shared: 0K

[root@apps ~]#

==================

List message queue.

[root@apps ~]# ipcs -q

------ Message Queues --------

key msqid owner perms used-bytes messages

[root@apps ~]#

list semaphore

[root@apps ~]# ipcs -s

------ Semaphore Arrays --------

key semid owner perms nsems

[root@apps ~]#

list shared memory.

[root@apps ~]# ipcs -m

------ Shared Memory Segments --------

key shmid owner perms bytes nattch status

0x00000000 65536 root 600 393216 2 dest

0x00000000 98305 root 600 393216 2 dest

0x00000000 131074 root 600 393216 2 dest

0x00000000 163843 root 600 393216 2 dest

0x00000000 196612 root 600 393216 2 dest

0x00000000 229381 root 600 393216 2 dest

0x00000000 262150 root 600 393216 2 dest

0x00000000 294919 root 600 393216 2 dest

0x00000000 327688 root 600 393216 2 dest

0x00000000 360457 root 600 393216 2 dest

[root@apps ~]#

=========================

Example's of grep command
===========================

[oracle@apps ~]$ cp -r db /u02 &

[1] 26764

[oracle@apps ~]$ ps -ef|grep -i cp

root 15 10 0 02:45 ? 00:00:00 [kacpid]

root 24979 1 0 02:46 ? 00:00:00 /usr/sbin/acpid

root 26128 26106 1 02:46 ? 00:00:32 /usr/X11R6/bin/X :0 -audit 0 -auth /var/gdm/:0.Xauth -nolisten tcp vt7

[oracle@apps u02]$ ls -ltrh

total 36K

drwxr-xr-x 3 applmgr dba 4.0K Feb 7 16:19 inst

drwxr-xr-x 4 applmgr dba 4.0K Feb 7 16:19 apps

drwxrwxrwx 2 applmgr dba 16K Feb 7 19:12 lost+found

drwxr-xr-x 2 root root 4.0K Feb 12 10:02 stage

-rw-r--r-- 1 root root 0 Feb 12 10:16 file3

-rw-r--r-- 1 root root 0 Feb 12 10:16 file2

-rw-r--r-- 1 root root 0 Feb 12 10:16 file1

drwxrwxrwx 4 root root 4.0K Feb 12 21:00 clone

drwxr-xr-x 4 oracle dba 4.0K Feb 14 03:33 db

[oracle@apps u02]$ rm -rf db &

[1] 26807

[oracle@apps u02]$ ps -ef|grep -i rm

root 26592 1 0 02:47 ? 00:00:21 /usr/bin/gnome-terminal

oracle 26807 26737 5 03:49 pts/2 00:00:00 rm -rf db

oracle 26809 26737 0 03:49 pts/2 00:00:00 grep -i rm

[oracle@apps u02]$

you can also check whether job is running or not.

[oracle@apps u02]$ jobs

[1]+ Running rm -rf db &

To stop remove job use kill cmd.

kill -9 process id

kill -9 26807

To check pmon is running or not.

[oracle@apps appsutil]$ ps -ef|grep -i pmon

oracle 1393 26737 0 04:11 pts/2 00:00:00 grep -i pmon

oracle 27379 1 0 03:53 ? 00:00:00 ora_pmon_PROD

[oracle@apps appsutil]$

To check fnd and http processes are running or not.

[applmgr@apps scripts]$ ps -fu applmgr|grep -i fnd|wc -l

[applmgr@apps scripts]$ ps -fu applmgr|grep -i http|wc -l

[applmgr@apps scripts]$

To check history.

[applmgr@apps scripts]$ history|grep -i fndcpass

686 ps -fu applmgr|grep -i FNDCPASS

687 ps -fu applmgr|grep -i FNDCPASS

688 ps -fu applmgr|grep -i FNDCPASS

712 history|grep -i fndcpass

[applmgr@apps scripts]$ history|grep -i adstrtal

20 ./adstrtal.sh apps/apps

25 ./adstrtal.sh apps/apps

You can also use fc -l cmd to check history in linux or Sunsolaris.

[applmgr@apps scripts]$ fc -l

699 ps -fu applmgr|grep -i http|awk '{print "kill -9",$2}'

700 kill -9 28298

701 kill -9 28303

702 kill -9 28304

703 kill -9 28309

704 kill -9 28360

705 kill -9 28362

706 kill -9 28363

707 kill -9 28366

708 kill -9 28367

709 kill -9 28368

710 kill -9 28519

711 ps -fu applmgr|grep -i http|wc -l

712 history|grep -i fndcpass

713 history|grep -i adstrtal

714 fc -l

715 fc -l|grep -i ps|head

[applmgr@apps scripts]$

Using grep command in fc -l.

[applmgr@apps scripts]$ fc -l|grep -i ps|head

698 ps -fu applmgr|grep -i http|wc -l

699 ps -fu applmgr|grep -i http|awk '{print "kill -9",$2}'

711 ps -fu applmgr|grep -i http|wc -l

[applmgr@apps scripts]$

How to check if a Port is listening for any Service?Checking webserver port no in the below example.

[applmgr@apps scripts]$ grep -i s_login $CONTEXT_FILE

<login_page oa_var="s_login_page">http://apps.user.com:8000/OA_HTML/AppsLogin</login_page>

[applmgr@apps scripts]$

[applmgr@apps scripts]$ netstat -an|grep -i 8000

tcp 0 0 0.0.0.0:8000 0.0.0.0:* LISTEN

[applmgr@apps scripts]$

Also you can check with lsof (list of open files).

[applmgr@apps scripts]$ lsof |grep -i 8000

httpd 27226 applmgr 18u IPv4 33089 TCP *:8000 (LI STEN)

rotatelog 27235 applmgr 10w REG 8,2 210 11846940 /u02/inst/ apps/PROD_apps/logs/ora/10.1.3/Apache/error_log.1360800000

rotatelog 27236 applmgr 11w REG 8,2 1056 11846827 /u02/inst/ apps/PROD_apps/logs/ora/10.1.3/Apache/access_log.1360800000

httpd 27239 applmgr 18u IPv4 33089 TCP *:8000 (LI STEN)

httpd 27241 applmgr 18u IPv4 33089 TCP *:8000 (LI STEN)

httpd 27244 applmgr 18u IPv4 33089 TCP *:8000 (LI STEN)

httpd 27245 applmgr 18u IPv4 33089 TCP *:8000 (LI STEN)

httpd 27246 applmgr 18u IPv4 33089 TCP *:8000 (LI STEN)

httpd 27247 applmgr 18u IPv4 33089 TCP *:8000 (LI STEN)

[applmgr@apps scripts]$

egrep example

<login_page oa_var="s_login_page">http://apps.user.com:8000/OA_HTML/AppsLogin</login_page>

<APPLCSF oa_var="s_applcsf">/u02/inst/apps/PROD_apps/logs/appl/conc</APPLCSF>

<APPLLOG oa_var="s_appllog">log</APPLLOG>

<APPLOUT oa_var="s_applout">out</APPLOUT>

<APPLTMP oa_var="s_appltmp">/u02/inst/apps/PROD_apps/appltmp</APPLTMP>

<APPLPTMP oa_var="s_applptmp" osd="UNIX">/usr/tmp</APPLPTMP>

[applmgr@apps ~]$

How can I find out if my processor is 64 bit or 32, under linux?

Look for lm (Long Mode) under flags - if you can see it, you have a 64 bit CPU, if not, it is a 32 bit one.

[root@apps ~]# cat /proc/cpuinfo

processor : 0

vendor_id : GenuineIntel

cpu family : 6

model : 5

model name : Intel(R) Core(TM) i5 CPU 650 @ 3.20GHz

stepping : 5

cpu MHz : 3191.891

cache size : 4096 KB

physical id : 0

siblings : 2

core id : 0

cpu cores : 2

fdiv_bug : no

hlt_bug : no

f00f_bug : no

coma_bug : no

fpu : yes

fpu_exception : yes

cpuid level : 11

wp : yes

flags : fpu vme de pse tsc msr pae mce cx8 apic sep mtrr pge mca cmov pat pse36 clflush dts acpi mmx fxsr sse sse2 ss ht nx rdtscp lm pni popcnt

bogomips : 6387.44

processor : 1

vendor_id : GenuineIntel

cpu family : 6

model : 5

model name : Intel(R) Core(TM) i5 CPU 650 @ 3.20GHz

stepping : 5

cpu MHz : 3191.891

cache size : 4096 KB

physical id : 0

siblings : 2

core id : 1

cpu cores : 2

fdiv_bug : no

hlt_bug : no

f00f_bug : no

coma_bug : no

fpu : yes

fpu_exception : yes

cpuid level : 11

wp : yes

flags : fpu vme de pse tsc msr pae mce cx8 apic sep mtrr pge mca cmov pat pse36 clflush dts acpi mmx fxsr sse sse2 ss ht nx rdtscp lm pni popcnt

bogomips : 6384.87

processor : 2

vendor_id : GenuineIntel

cpu family : 6

model : 5

model name : Intel(R) Core(TM) i5 CPU 650 @ 3.20GHz

stepping : 5

cpu MHz : 3191.891

cache size : 4096 KB

physical id : 1

siblings : 2

core id : 2

cpu cores : 2

fdiv_bug : no

hlt_bug : no

f00f_bug : no

coma_bug : no

fpu : yes

fpu_exception : yes

cpuid level : 11

wp : yes

flags : fpu vme de pse tsc msr pae mce cx8 apic sep mtrr pge mca cmov pat pse36 clflush dts acpi mmx fxsr sse sse2 ss ht nx rdtscp lm pni popcnt

bogomips : 6384.95

processor : 3

vendor_id : GenuineIntel

cpu family : 6

model : 5

model name : Intel(R) Core(TM) i5 CPU 650 @ 3.20GHz

stepping : 5

cpu MHz : 3191.891

cache size : 4096 KB

physical id : 1

siblings : 2

core id : 3

cpu cores : 2

fdiv_bug : no

hlt_bug : no

f00f_bug : no

coma_bug : no

fpu : yes

fpu_exception : yes

cpuid level : 11

wp : yes

flags : fpu vme de pse tsc msr pae mce cx8 apic sep mtrr pge mca cmov pat pse36 clflush dts acpi mmx fxsr sse sse2 ss ht nx rdtscp lm pni popcnt

bogomips : 6384.69

[root@apps ~]#

[root@apps ~]# cat /proc/cpuinfo|grep -i lm

flags : fpu vme de pse tsc msr pae mce cx8 apic sep mtrr pge mca cmov pat pse36 clflush dts acpi mmx fxsr sse sse2 ss ht nx rdtscp lm pni popcnt

[root@apps ~]#

Look for lm (Long Mode) under flags - if you can see it, you have a 64 bit CPU, if not, it is a 32 bit one.

=====================

How to check all mount pints of a server ?

[oracle@devuser u02]$ df -kh

Filesystem Size Used Avail Use% Mounted on

/dev/sda1 15G 6.9G 6.8G 51% /

none 2.2G 0 2.2G 0% /dev/shm

/dev/sda5 4.9G 344M 4.3G 8% /tmp

/dev/sda2 39G 2.4G 35G 7% /u01

/dev/sda6 34G 765M 31G 3% /u02

/dev/hdc 3.1G 3.1G 0 100% /media/cdrecorder

=========================

How to make tar?

i have a share mount point that is backup and you must be in oracle directory to make it tar.
in the below example it is taking input as 11.2.0 and sending the output to backup location.

nohup tar -cvf - 11.2.0 | gzip -c > /backup/share/1120.tar.gz &
nohup tar -cvf - appl | gzip -c > /backup/share/appl.tar.gz &
nohup tar -cvf - 10.1.2 | gzip -c > /backup/share/1012.tar.gz &
nohup tar -cvf - 10.1.3 | gzip -c > /backup/share/1013.tar.gz &
nohup tar -cvf - comn | gzip -c > /backup/share/comn.tar.gz &

How to untar?

you must be in oracle directory.
cd /u02/oracle

under oracle directoy 11.2.0 directory will be untar.as the gunzip command taking the input from backup location
and making under it from where you fired the command in my case oracle directory.
cd /u02/oracle

gunzip -c /backup/share/1120.tar.gz | tar -xvf - &

Pages

Linux/Unix

How to find Operting System is 32 bit or 64 bit?

To find only directories in Linux/Sunsolaris?

To find operating system version?

To delete the trace files older than 30 days.?

To find the files more than 200MB.?

To find the req/out/log files which are more than 10Mb.

Default block size in Linux

Confirm current filesystem parameters with tune2fs

Creating 0 bytes (empty) files using touch command.

To change the the timestamp (date and time of modification) of a file or directory.

User Administration=============

To modify the properties of a user.

============================

To delete a user============

Creating a group
===========

To view how long the system is running.

Example's of grep command
===========================

egrep example

How to make tar?

How to untar?

3 comments:

Pages

Linux/Unix

How to find Operting System is 32 bit or 64 bit?

To find only directories in Linux/Sunsolaris?

To find operating system version?

To delete the trace files older than 30 days.?

To find the files more than 200MB.?

To find the req/out/log files which are more than 10Mb.

Default block size in Linux

Confirm current filesystem parameters with tune2fs

Creating 0 bytes (empty) files using touch command.

To change the the timestamp (date and time of modification) of a file or directory.

User Administration=============

To modify the properties of a user.

============================

To delete a user============

Creating a group===========

To view how long the system is running.

Example's of grep command===========================

egrep example

How to make tar?

How to untar?

3 comments:

Creating a group
===========

Example's of grep command
===========================