touch 222.txt
[root@localhost /]# cat /old/222.txt
http://www.baidu.com
http://www.baidu.com
http://www.baidu.com
http://www.baidu.com
[root@localhost /]# find / -type f -name "222.txt"|xargs sed -i 's/http:\/\/www.baidu.com/www.xian.com/g'
[root@localhost /]# cat /old/222.txt
www.xian.com
www.xian.com
www.xian.com
www.xian.com
[root@localhost /]# find / -type f -name "222.txt"|xargs sed 's/www.xian.com/http:\/\/www.baidu.com/g' (不加參數只是打印更改結果,實際內容未變)
http://www.baidu.com
http://www.baidu.com
http://www.baidu.com
[root@localhost /]# nl /old/222.txt|sed '2,3d' (刪除2-3行)
1 http://www.baidu.com
4 http://www.baidu.com
[root@localhost /]# sed -n '1p' /old/222.txt (只打印第一行,不加-n都打印)
http://www.baidu.com