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Shell Programming and Scripting
Updating the comments field on /etc/passwd
Post 302279536 by Linux Duke on Friday 23rd of January 2009 03:23:25 AM
01-23-2009
Hi there,
The script is still not working it just execute and does nothing to /etc/passwd and it gives no errors this time. Please check below I have attached my /etc/passwd output before executing the script then the content of the script and output produced after execution check /etc/passwd work nothing has been updated. I actually tested it on two servers which are server1 and server2 same output nothing updated.
ntp:x:38:38::/etc/ntp:/sbin/nologin
haldaemon:x:68:68:HAL daemon:/:/sbin/nologin
apache:x:48:48:Apache:/var/www:/sbin/nologin
distcache:x:94:94
istcache:/:/sbin/nologin
postgres:x:26:26:PostgreSQL Server:/var/lib/pgsql:/bin/bash
mysql:x:27:27:MySQL Server:/var/lib/mysql:/bin/bash
dovecot:x:97:97:dovecot:/usr/libexec/dovecot:/sbin/nologin
webalizer:x:67:67:Webalizer:/var/www/usage:/sbin/nologin
squid:x:23:23::/var/spool/squid:/sbin/nologin
xfs:x:43:43:X Font Server:/etc/X11/fs:/sbin/nologin
named:x:25:25:Named:/var/named:/sbin/nologin
gdm:x:42:42::/var/gdm:/sbin/nologin
sabayon:x:86:86:Sabayon user:/home/sabayon:/sbin/nologin
student2:x:500:500:student2:/home/student2:/bin/bash
web:x:100:48:Web File Owner:/home/web:/bin/bash
SINLO_R:x:501:501::/home/SINLO_R:/bin/bash
AVNLNX:x:502:502::/home/AVNLNX:/bin/bash
REGGIE_P:x:503:503::/home/REGGIE_P:/bin/bash
STONE_P:x:504:504::/home/STONE_P:/bin/bash
GCOGCO:x:505:505::/home/GCOGCO:/bin/bash
NDUMIE:x:506:506::/home/NDUMIE:/bin/bash
MANGI:x:507:507::/home/MANGI:/bin/bash
MZIZA_G:x:508:508::/home/MZIZA_G:/bin/bash
[root@server2 script]# date
Thu Jan 22 21:49:49 SAST 2009
#!/bin/bash
FILE1=/tmp/update.txt
FILE2=/etc/passwd
cp $FILE2 /etc/passwd.$$.orig
TEST=echo
for i in `awk -F: '$1 == "'"$HOSTNAME"'" { print $2 }' $FILE1`
do
if awk -F: '$1 == "'"${i}"'" { found=1; exit; } END { exit(!found);}' $FILE2
then
FIELD1=`awk -F: '$1 == "'"$HOSTNAME"'" && $2 == "'"${i}"'" { print $3;exit; }' $FILE1`
$TEST usermod -c "${FIELD1}" $i
fi
done
~
~
[root@server2 script]# ls
unixscript.txt
[root@server2 script]# ./unixscript.txt
[root@server2 script]#
nfsnobody:x:65534:65534:Anonymous NFS User:/var/lib/nfs:/sbin/nologin
sshd:x:74:74:Privilege-separated SSH:/var/empty/sshd:/sbin/nologin
pcap:x:77:77::/var/arpwatch:/sbin/nologin
ntp:x:38:38::/etc/ntp:/sbin/nologin
haldaemon:x:68:68:HAL daemon:/:/sbin/nologin
apache:x:48:48:Apache:/var/www:/sbin/nologin
distcache:x:94:94istcache:/:/sbin/nologin
postgres:x:26:26:PostgreSQL Server:/var/lib/pgsql:/bin/bash
mysql:x:27:27:MySQL Server:/var/lib/mysql:/bin/bash
dovecot:x:97:97:dovecot:/usr/libexec/dovecot:/sbin/nologin
webalizer:x:67:67:Webalizer:/var/www/usage:/sbin/nologin
squid:x:23:23::/var/spool/squid:/sbin/nologin
xfs:x:43:43:X Font Server:/etc/X11/fs:/sbin/nologin
named:x:25:25:Named:/var/named:/sbin/nologin
gdm:x:42:42::/var/gdm:/sbin/nologin
sabayon:x:86:86:Sabayon user:/home/sabayon:/sbin/nologin
student2:x:500:500:student2:/home/student2:/bin/bash
web:x:100:48:Web File Owner:/home/web:/bin/bash
SINLO_R:x:501:501::/home/SINLO_R:/bin/bash
AVNLNX:x:502:502::/home/AVNLNX:/bin/bash
REGGIE_P:x:503:503::/home/REGGIE_P:/bin/bash
STONE_P:x:504:504::/home/STONE_P:/bin/bash
GCOGCO:x:505:505::/home/GCOGCO:/bin/bash
NDUMIE:x:506:506::/home/NDUMIE:/bin/bash
MANGI:x:507:507::/home/MANGI:/bin/bash
MZIZA_G:x:508:508::/home/MZIZA_G:/bin/bash
[root@server2 script]# date
Thu Jan 22 21:52:19 SAST 2009
[root@server2 script]#
Thanks
The script is still not working it just execute and does nothing to /etc/passwd and it gives no errors this time. Please check below I have attached my /etc/passwd output before executing the script then the content of the script and output produced after execution check /etc/passwd work nothing has been updated. I actually tested it on two servers which are server1 and server2 same output nothing updated.
ntp:x:38:38::/etc/ntp:/sbin/nologin
haldaemon:x:68:68:HAL daemon:/:/sbin/nologin
apache:x:48:48:Apache:/var/www:/sbin/nologin
distcache:x:94:94
istcache:/:/sbin/nologinpostgres:x:26:26:PostgreSQL Server:/var/lib/pgsql:/bin/bash
mysql:x:27:27:MySQL Server:/var/lib/mysql:/bin/bash
dovecot:x:97:97:dovecot:/usr/libexec/dovecot:/sbin/nologin
webalizer:x:67:67:Webalizer:/var/www/usage:/sbin/nologin
squid:x:23:23::/var/spool/squid:/sbin/nologin
xfs:x:43:43:X Font Server:/etc/X11/fs:/sbin/nologin
named:x:25:25:Named:/var/named:/sbin/nologin
gdm:x:42:42::/var/gdm:/sbin/nologin
sabayon:x:86:86:Sabayon user:/home/sabayon:/sbin/nologin
student2:x:500:500:student2:/home/student2:/bin/bash
web:x:100:48:Web File Owner:/home/web:/bin/bash
SINLO_R:x:501:501::/home/SINLO_R:/bin/bash
AVNLNX:x:502:502::/home/AVNLNX:/bin/bash
REGGIE_P:x:503:503::/home/REGGIE_P:/bin/bash
STONE_P:x:504:504::/home/STONE_P:/bin/bash
GCOGCO:x:505:505::/home/GCOGCO:/bin/bash
NDUMIE:x:506:506::/home/NDUMIE:/bin/bash
MANGI:x:507:507::/home/MANGI:/bin/bash
MZIZA_G:x:508:508::/home/MZIZA_G:/bin/bash
[root@server2 script]# date
Thu Jan 22 21:49:49 SAST 2009
#!/bin/bash
FILE1=/tmp/update.txt
FILE2=/etc/passwd
cp $FILE2 /etc/passwd.$$.orig
TEST=echo
for i in `awk -F: '$1 == "'"$HOSTNAME"'" { print $2 }' $FILE1`
do
if awk -F: '$1 == "'"${i}"'" { found=1; exit; } END { exit(!found);}' $FILE2
then
FIELD1=`awk -F: '$1 == "'"$HOSTNAME"'" && $2 == "'"${i}"'" { print $3;exit; }' $FILE1`
$TEST usermod -c "${FIELD1}" $i
fi
done
~
~
[root@server2 script]# ls
unixscript.txt
[root@server2 script]# ./unixscript.txt
[root@server2 script]#
nfsnobody:x:65534:65534:Anonymous NFS User:/var/lib/nfs:/sbin/nologin
sshd:x:74:74:Privilege-separated SSH:/var/empty/sshd:/sbin/nologin
pcap:x:77:77::/var/arpwatch:/sbin/nologin
ntp:x:38:38::/etc/ntp:/sbin/nologin
haldaemon:x:68:68:HAL daemon:/:/sbin/nologin
apache:x:48:48:Apache:/var/www:/sbin/nologin
distcache:x:94:94
istcache:/:/sbin/nologinpostgres:x:26:26:PostgreSQL Server:/var/lib/pgsql:/bin/bash
mysql:x:27:27:MySQL Server:/var/lib/mysql:/bin/bash
dovecot:x:97:97:dovecot:/usr/libexec/dovecot:/sbin/nologin
webalizer:x:67:67:Webalizer:/var/www/usage:/sbin/nologin
squid:x:23:23::/var/spool/squid:/sbin/nologin
xfs:x:43:43:X Font Server:/etc/X11/fs:/sbin/nologin
named:x:25:25:Named:/var/named:/sbin/nologin
gdm:x:42:42::/var/gdm:/sbin/nologin
sabayon:x:86:86:Sabayon user:/home/sabayon:/sbin/nologin
student2:x:500:500:student2:/home/student2:/bin/bash
web:x:100:48:Web File Owner:/home/web:/bin/bash
SINLO_R:x:501:501::/home/SINLO_R:/bin/bash
AVNLNX:x:502:502::/home/AVNLNX:/bin/bash
REGGIE_P:x:503:503::/home/REGGIE_P:/bin/bash
STONE_P:x:504:504::/home/STONE_P:/bin/bash
GCOGCO:x:505:505::/home/GCOGCO:/bin/bash
NDUMIE:x:506:506::/home/NDUMIE:/bin/bash
MANGI:x:507:507::/home/MANGI:/bin/bash
MZIZA_G:x:508:508::/home/MZIZA_G:/bin/bash
[root@server2 script]# date
Thu Jan 22 21:52:19 SAST 2009
[root@server2 script]#
Thanks
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LEARN ABOUT SUSE
chsh
chsh(1) General Commands Manual chsh(1) NAME
chsh - change login shell SYNOPSIS
chsh [-D binddn] [-P path] [-s shell] [-l] [-q] [-u] [-v] [user] DESCRIPTION
chsh is used to change the user login shell. A normal user may only change the login shell for their own account, the super user may change the login shell for any account. If a shell is not given on the command line, chsh operates in an interactive fashion, prompting the user with the current login shell. Enter the new value to change the field, or leave the line blank to use the current value. Enter none to remove the current value. The current value is displayed between a pair of [ ] marks. The only restrictions placed on the login shell is that the command name must be listed in /etc/shells, unless the invoker is the super- user, and then any value may be added. An account with a restricted login shell may not change their login shell. This version of chsh is able to change the shell of local, NIS, NIS+ and LDAP accounts , if the permissions allow it. OPTIONS
-D, --binddn binddn Use the Distinguished Name binddn to bind to the LDAP directory. The user will be prompted for a password for simple authentica- tion. -P, --path path The passwd file is located below the specified directory path. chsh will use this files, not /etc/passwd. This is useful for exam- ple on NIS master servers, where you do not want to give all users in the NIS database automatic access to your NIS server and the NIS map is build from special files. -s, --shell Specify your login shell. -l, --list-shells Print the list of shells listed in /etc/shells and exit. -q, --quite Don't be verbose. -u, --usage Print a usage message and exit. --help Print a more verbose help text and exit. -v, --version Print version information and exit. FILES
/etc/passwd - user account information /etc/shells - list of valid login shells SEE ALSO
chfn(1), passwd(5), shells(5) AUTHOR
Thorsten Kukuk <kukuk@suse.de> pwdutils February 2004 chsh(1)