1、顯示paswd檔案第9行內容

# sed -n "9p" passwd vcsa:x:69:69:virtual console memory owner:/dev:/sbin/nologin

2、顯示passwd檔案，9至15行內容

# sed -n "9,15p" passwd vcsa:x:69:69:virtual console memory owner:/dev:/sbin/nologinsaslauth:x:499:76:"Saslauthd user":/var/empty/saslauth:/sbin/nologinpostfix:x:89:89::/var/spool/postfix:/sbin/nologinsshd:x:74:74:Privilege-separated SSH:/var/empty/sshd:/sbin/nologinhaproxy:x:500:500::/home/haproxy:/bin/falsentp:x:38:38::/etc/ntp:/sbin/nologinmysql:x:27:27:MySQL Server:/var/lib/mysql:/bin/bash

3、顯示9與15行內容

# sed -n "9p;15p" passwd vcsa:x:69:69:virtual console memory owner:/dev:/sbin/nologinmysql:x:27:27:MySQL Server:/var/lib/mysql:/bin/bash