Daily use Unix Commands
$uptime <-- To check the system uptime and we get to know that if its rebooted recently with other details.
ps -eaf | grep i<inode> <-- Fetch file using I node number.
ps -eaf | grep i check <-- to get the all inode numbers with file name in PWD.
topas <-To get the usage of kernel ,cpu,user,idle.
at now <-- to start process manually right away
> <filenname> <-- to make file size as 0 byte or Zero byte .
df -gt . <--To find where the file is mounted on or where its located with file system usage= Example like :/Home or /Shared.
where . <-- current path
df -gt <file name or /P /CDW> <-- Directly fetch exact info(file permission,size,created date) file/Dir which u metioned .
dsmc arch <File Name> <-- To takes bakup on TSM server.
chfs -a size=+10MB /home <--To add 10MB under /Home
ls -ltr <-- To get all list of files /Dir's with file size in current path.
ls -ld <Dir> <--To get the exact dir.
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Mount unmount nfsmount
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echo $SHELL <-- Command to find the current shell.
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Chown:
For example, the following would transfer the ownership of a file named file1 and a directory named dir1 to a new owner named alice:
chown alice file1 dir1
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SCP Copy the file from SYSMGT04 to SYSMGT02:
$pwd
$sysmgt02
$ scp vrathth@sysmgt04:/home/vrathth/file1 /home/vrathth/
vrathth@sysmgt04's password:
file1 100% 0 0.0KB/s 00:00
$ls -l
file1
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$lscfg -v <-- list all the devices with model numbers
sysmgt04: /# getconf DISK_SIZE /dev/hdisk1
140013
sysmgt04: /# who -r <-- runlevel
. run-level 2 Dec 5 13:27 2 0 S
sysmgt04: /# lsdev -Pc tape <-- list tape devices
sysmgt04: /# getconf BOOT_DEVICE <-- boot device
hdisk0
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Using the chgrp Command on a File
--------------------------------
# ls -l
total 12
-rw-rw-r– 1 tclark authors 2229 Jan 13 21:35 declaration.txt
-rw-rw-r– 1 tclark authors 1310 Jan 13 17:48 gettysburg.txt
-rw-rw-r– 1 tclark authors 360 Jan 13 17:48 preamble.txt
# chgrp presidents gettysburg.txt
# ls -l
total 12
-rw-rw-r– 1 tclark authors 2229 Jan 13 21:35 declaration.txt
-rw-rw-r– 1 tclark presidents 1310 Jan 13 17:48 gettysburg.txt
-rw-rw-r– 1 tclark authors 360 Jan 13 17:48 preamble.txt
======================================
Using the chgrp Command on a Directory
-------------------------------
# ls -l
total 4
-rw-rw-r– 1 tclark tclark 0 Jan 13 21:13 example1.fil
-rw-rw-r– 1 tclark tclark 0 Jan 13 21:13 example2.xxx
drwxrwxr-x 2 tclark tclark 4096 Jan 13 21:35 examples
# chgrp authors examples
# ls -l
total 4
-rw-rw-r– 1 tclark tclark 0 Jan 13 21:13 example1.fil
-rw-rw-r– 1 tclark tclark 0 Jan 13 21:13 example2.xxx
drwxrwxr-x 2 tclark authors 4096 Jan 13 21:35 examples
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Change User Ownership
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The chown (change owner) command can be used to change ownership of a file or directory. The syntax is very similar to chgrp.
# ls -l
total 12
-rw-rw-r– 1 tclark authors 2229 Jan 13 21:35 declaration.txt
-rw-rw-r– 1 tclark authors 1310 Jan 13 17:48 gettysburg.txt
-rw-rw-r– 1 tclark authors 360 Jan 13 17:48 preamble.txt
# chown abe gettysburg.txt
# ls -l
total 12
-rw-rw-r– 1 tclark authors 2229 Jan 13 21:35 declaration.txt
-rw-rw-r– 1 abe authors 1310 Jan 13 17:48 gettysburg.txt
-rw-rw-r– 1 tclark authors 360 Jan 13 17:48 preamble.txt
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sysmgt04: /home/vdas9am/sample# ls -l <--copying data with file permission.
total 0
-rw-rw-r-x 1 root system 0 Apr 23 01:00 b
-rw------- 1 root system 0 Apr 23 01:14 c
sysmgt04: /home/vdas9am/sample# cp -p b c
sysmgt04: /home/vdas9am/sample# ls -l
total 0
-rw-rw-r-x 1 root system 0 Apr 23 01:00 b
-rw-rw-r-x 1 root system 0 Apr 23 01:00 c
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$istat mydir <-- to see all the details abt dir.
$. <file/Dir> <-- to excute the file or dir or Shall (after . one speace should be there)
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etc/inittab
tsm:2:wait <--once it start after other related process will get start if its doesn't start other related process also won't
start.
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What's the command to see the kernel version?
uname -r
uname -a <-- to see all information like machine model
uname -v <-- see OS version
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When we create user then following files are edited
/etc/passwd
/etc/security/passwd
/etc/security/limits
/etc/security/user
/etc/security/.profile
/usr/lib/security/mkuser.default
/usr/lib/security/mkuser.sys
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how to take backup in aix server
Best Rated Answer:
(1)For backup of rootvg, mksysb command can be used on command line or via smitty.
Advantage of mksysb is that it can create a 'bootable' media of the backup of rootvg.
(2) For backup of filesystems, 'backup' command can be used ( restore command to be used for restoration of the backup).
(3) The answer given regarding savevg ( and restvg ) is correct
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How will u create bosboot image (Except bosboot -ad /dev/diskname)?
Best Rated Answer:
There is also a command to create boot image
mkboot -c -d /dev/diskname
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