使用awk命令批量删除指定范围的账号

[root@DCGH ~]# awk -F ":" 'NR>=22&&NR<=28{cmd="userdel -r";user=$1;system(cmd" "user)}' /etc/passwd

[root@DCGH ssh]# awk -F ":" '{if(NR==11){print NR ":" $1}else if(NR==12){print NR ":" $1}}' /etc/passwd
11:games
12:ftp
[root@DCGH ssh]# awk -F ":" 'BEGIN{cmd="userdel -r"}{if(NR==11){user=$1;system(cmd" "user)}else if(NR==12){user=$1;system(cmd" "user)}}' /etc/passwd
userdel：组“games”没有移除，因为它不是用户 games 的主组
userdel: games 邮件池 (/var/spool/mail/games) 未找到
userdel：/usr/games 并不属于 games，所以不会删除
userdel: ftp 邮件池 (/var/spool/mail/ftp) 未找到
userdel：未找到 ftp 的主目录“/var/ftp”
[root@DCGH ssh]# nl /etc/passwd
     1  root:x:0:0:root:/root:/bin/bash
     2  bin:x:1:1:bin:/bin:/sbin/nologin
     3  daemon:x:2:2:daemon:/sbin:/sbin/nologin
     4  adm:x:3:4:adm:/var/adm:/sbin/nologin
     5  lp:x:4:7:lp:/var/spool/lpd:/sbin/nologin
     6  sync:x:5:0:sync:/sbin:/bin/sync
     7  shutdown:x:6:0:shutdown:/sbin:/sbin/shutdown
     8  halt:x:7:0:halt:/sbin:/sbin/halt
     9  mail:x:8:12:mail:/var/spool/mail:/sbin/nologin
    10  operator:x:11:0:operator:/root:/sbin/nologin
    11  nobody:x:99:99:Nobody:/:/sbin/nologin
    12  avahi-autoipd:x:170:170:Avahi IPv4LL Stack:/var/lib/avahi-autoipd:/sbin/nologin
    13  systemd-bus-proxy:x:999:997:systemd Bus Proxy:/:/sbin/nologin
    14  systemd-network:x:998:996:systemd Network Management:/:/sbin/nologin
    15  dbus:x:81:81:System message bus:/:/sbin/nologin
    16  polkitd:x:997:995:User for polkitd:/:/sbin/nologin
    17  tss:x:59:59:Account used by the trousers package to sandbox the tcsd daemon:/dev/null:/sbin/nologin
    18  postfix:x:89:89::/var/spool/postfix:/sbin/nologin
    19  sshd:x:74:74:Privilege-separated SSH:/var/empty/sshd:/sbin/nologin
    20  tcpdump:x:72:72::/:/sbin/nologin

awk -F ":" '{if(NR==11){print NR ":" $1}else if(NR==12){print NR ":" $1}}' /etc/passwd

awk -F ":" 'BEGIN{cmd="userdel -r"}{if(NR==11){user=$1;system(cmd" "user)}else if(NR==12){user=$1;system(cmd" "user)}}' /etc/passwd