리눅스 계정 목록 보기

[root@zetawiki ~]# cat /etc/passwd
root:x:0:0:root:/root:/bin/bash
bin:x:1:1:bin:/bin:/sbin/nologin
daemon:x:2:2:daemon:/sbin:/sbin/nologin
.. (생략)
named:x:25:25:Named:/var/named:/sbin/nologin

[root@zetawiki ~]# cut -f1 -d: /etc/passwd
root
bin
daemon
.. (생략)
named

[root@zetawiki ~]# grep /bin/bash /etc/passwd
root:x:0:0:root:/root:/bin/bash
mysql:x:27:27:MySQL Server:/var/lib/mysql:/bin/bash

[root@zetawiki ~]# grep /bin/bash /etc/passwd | cut -f1 -d:
root
mysql

[root@zetawiki ~]# tail -6 /etc/passwd
saslauth:x:499:76:"Saslauthd user":/var/empty/saslauth:/sbin/nologin
postfix:x:89:89::/var/spool/postfix:/sbin/nologin
sshd:x:74:74:Privilege-separated SSH:/var/empty/sshd:/sbin/nologin
devuser:x:500:500::/home/devuser:/bin/bash
deployuser:x:501:501::/home/deployuser:/bin/bash
testuser:x:502:502::/home/testuser:/bin/bash

[root@zetawiki ~]# awk -F':' '{if($3>=500)print $1}' /etc/passwd
devuser
deployuser
testuser

[root@zetawiki ~]# u1=$(grep "^UID_MIN" /etc/login.defs | awk '{print $2}')
[root@zetawiki ~]# u2=$(grep "^UID_MAX" /etc/login.defs | awk '{print $2}')
[root@zetawiki ~]# awk -F':' -v "u1=$u1" -v "u2=$u2" '{ if ( $3>=u1 && $3<=u2 ) print $0}' /etc/passwd
devuser:x:500:500::/home/devuser:/bin/bash
deployuser:x:501:501::/home/deployuser:/bin/bash
testuser:x:502:502::/home/testuser:/bin/bash

[root@zetawiki ~]# awk -F':' -v "u1=$u1" -v "u2=$u2" '{ if ( $3>=u1 && $3<=u2 ) print $1}' /etc/passwd
devuser
deployuser
testuser

[root@zetawiki ~]# a=$(grep ^UID_MIN /etc/login.defs | awk '{print $2}')
[root@zetawiki ~]# b=$(grep ^UID_MAX /etc/login.defs | awk '{print $2}')
[root@zetawiki ~]# c=$(grep /bin/bash /etc/passwd | awk -F':' '{print $1}')
[root@zetawiki ~]# d=$(awk -F':' -v "a=$a" -v "b=$b" '{ if ( $3>=a && $3<=b ) print $1}' /etc/passwd)
[root@zetawiki ~]# echo -e "$c\n$d" | sort | uniq
root
devuser
deployuser
testuser

[root@zetawiki ~]# c=$(grep /bin/bash /etc/passwd | awk -F':' '{print $0}')
[root@zetawiki ~]# d=$(awk -F':' -v "a=$a" -v "b=$b" '{ if ( $3>=a && $3<=b ) print $0}' /etc/passwd)
[root@zetawiki ~]# echo -e "$c\n$d" | sort | uniq
root:x:0:0:root:/root:/bin/bash
devuser:x:500:500::/home/devuser:/bin/bash
deployuser:x:501:501::/home/deployuser:/bin/bash
testuser:x:502:502::/home/testuser:/bin/bash