rename重命名

[root@liuwei test]# ls
11.txt  12.txt  13.txt  14.txt  15.txt  16.txt  17.txt  18.txt  19.txt  1.txt  20.txt  2.txt  3.txt  4.txt  5.txt  6.txt  7.txt  8.txt  9.txt

[root@liuwei test]# rename .txt .txt.bak *
[root@liuwei test]# ls
11.txt.bak  13.txt.bak  15.txt.bak  17.txt.bak  19.txt.bak  20.txt.bak  3.txt.bak  5.txt.bak  7.txt.bak  9.txt.bak
12.txt.bak  14.txt.bak  16.txt.bak  18.txt.bak  1.txt.bak   2.txt.bak   4.txt.bak  6.txt.bak  8.txt.bak

[root@liuwei test]# rename .bak "" *
[root@liuwei test]# ls
11.txt  12.txt  13.txt  14.txt  15.txt  16.txt  17.txt  18.txt  19.txt  1.txt  20.txt  2.txt  3.txt  4.txt  5.txt  6.txt  7.txt  8.txt  9.txt