20151202正則第四部分（grep,egrep,sed複習)
阿新 • • 發佈：2019-01-25
[[email protected] ~]# sed '20,$s/.*/aaa:&/' 1.txt
root:x:0:0:root:/root:/bin/bash
bin:x:1:1:bin:/bin:/sbin/nologin
daemon:x:2:2:daemon:/sbin:/sbin/nologin
adm:x:3:4:adm:/var/adm:/sbin/nologin
lp:x:4:7:lp:/var/spool/lpd:/sbin/nologin
sync:x:5:0:sync:/sbin:/bin/sync
shutdown:x:6:0:shutdown:/sbin:/sbin/shutdown
halt:x:7:0:halt:/sbin:/sbin/halt
mail:x:8:12:mail:/var/spool/mail:/sbin/nologin
uucp:x:10:14:uucp:/var/spool/uucp:/sbin/nologin
operator:x:11:0:operator:/root:/sbin/nologin
games:x:12:100:games:/usr/games:/sbin/nologin
gopher:x:13:30:gopher:/var/gopher:/sbin/nologin
ftp:x:14:50:FTP User:/var/ftp:/sbin/nologin
nobody:x:99:99:Nobody:/:/sbin/nologin
dbus:x:81:81:System message bus:/:/sbin/nologin
usbmuxd:x:113:113:usbmuxd user:/:/sbin/nologin
vcsa:x:69:69:virtual console memory owner:/dev:/sbin/nologin
rtkit:x:499:497:RealtimeKit:/proc:/sbin/nologin
aaa:avahi-autoipd:x:170:170:Avahi IPv4LL Stack:/var/lib/avahi-au toipd:/sbin/nologin
aaa:pulse:x:498:496:PulseAudio System Daemon:/var/run/pulse:/sbi n/nologin
aaa:haldaemon:x:68:68:HAL daemon:/:/sbin/nologin
aaa:ntp:x:38:38::/etc/ntp:/sbin/nologin
aaa:apache:x:48:48:Apache:/var/www:/sbin/nologin
aaa:saslauth:x:497:76:"Saslauthd user":/var/empty/saslauth:/sbin /nologin
aaa:postfix:x:89:89::/var/spool/postfix:/sbin/nologin
aaa:abrt:x:173:173::/etc/abrt:/sbin/nologin
aaa:gdm:x:42:42::/var/lib/gdm:/sbin/nologin
aaa:sshd:x:74:74:Privilege-separated SSH:/var/empty/sshd:/sbin/n ologin
aaa:tcpdump:x:72:72::/:/sbin/nologin
aaa:niejicai:x:500:500:niejicai:/home/niejicai:/bin/bash
aaa:hacluster:x:496:493:heartbeat user:/var/lib/heartbeat/cores/ hacluster:/sbin/nologin
aaa:xiaonie:x:501:501::/home/xiaonie:/bin/bash
aaa:user1:x:502:503::/home/user1:/bin/bash
aaa:user2:x:5505:5505::/home/user2:/bin/bash
aaa:user10:x:5506:5507::/home/user10:/bin/bash
aaa:user20:x:505:505::/home/user20:/bin/bash
aaa:user41:x:5562:500::/home/user41:/bin/bash
aaa:user42:x:5561:500::/home/user42:/bin/bash
aaa:user4:x:509:500:user4,ddddddddddd,aaaaaaaaaaa,11111111111111 1:/home/user444:/bin/bash
aaa:user0:x:5563:5563::/home/user0:/bin/bash