Learn a Linux command every day (18): MV

Brother of migrant workers 2021-01-21 19:56:35
learn linux command day mv


mv Commands are used to move and rename files and directories . Or move files from one directory to another , If you move a file to an existing target file , At this time, the contents of the target file will be covered by the contents of this file .

If the source is a file , And the target is the directory ,mv The location of the file will be moved . If the source is a directory , Then the target can only be a directory ( Cannot be a file ),mv Will rename the directory .

mv Command to move files , With different goals , There will be the following 4 Different results :

  • If the target is a specified specific path , The source file will be moved to this directory , And the file name does not change .
  • If the target is not a directory , Then the source file name ( There can only be one ) Will change to this target file name , If there is a file with the same name , The existing file with the same name will be overwritten .
  • If the source file and the target file are in the same directory ,mv The purpose of this is to modify the file name .
  • When the target is a directory , Source files or directories can be multiple , At this time, all the source files will be moved to the target directory . And all files will retain the previous file name .

Grammar format

mv [ Options ] Source file or directory Target file or directory
mv [options] source destination

Option description

-b # When a file exists , Before coverage , Create a backup for it
-f # If the moved file or directory is duplicate with the target , Then directly cover
-i # Interactive operation , The user will be prompted to confirm before covering , User input Y/N To confirm whether to cover
-u # If the target file already exists , And it has the same name as the file to be moved , Only when the source file is newer than the target file , To update the target file
-t # Appoint mv Target directory for , This option is used to move multiple files to a directory , At this point, the target file comes first , The source file is after .
-S< suffix >:# Specify a suffix for the backup file , Instead of using the default suffix ( Remove the slash from the source file “/”)
-n # Do not override any existing files
-T # Treat the target as a normal file , Not the catalog
-v # Detailed output command execution process 

Application, for example,

# Move the file to the destination directory
[root@centos7 testdir]# ll
total 0
-rw-r--r-- 1 root root 0 Feb 25 2021 filetest
-rw-r--r-- 1 root root 0 Feb 25 2021 testfile
[root@centos7 ~]# mv mingongge.txt testdir/
[root@centos7 ~]# ll testdir/
total 0
-rw-r--r-- 1 root root 0 Feb 25 2021 filetest
-rw-r--r-- 1 root root 0 Jan 2 08:43 mingongge.txt
-rw-r--r-- 1 root root 0 Feb 25 2021 testfile
# Move and duplicate the command file
[root@centos7 testdir]# mv mingongge.txt test/mingongge
[root@centos7 testdir]# ll test/
total 0
-rw-r--r-- 1 root root 0 Jan 2 08:50 mingongge

If the destination has a file with the same name , We don't want it covered , You can add -n Options .

[root@centos7 testdir]# ll *.txt dir/*.txt
-rw-r--r-- 1 root root 0 Jan 2 08:58 dir/test1.txt
-rw-r--r-- 1 root root 0 Jan 2 08:58 dir/test2.txt
-rw-r--r-- 1 root root 0 Jan 2 09:03 test1.txt
-rw-r--r-- 1 root root 0 Jan 2 08:57 test2.txt
-rw-r--r-- 1 root root 0 Jan 2 09:03 test3.txt
[root@centos7 testdir]# mv -nv *.txt dir/
‘test3.txt’ -> ‘dir/test3.txt’
# There is no... In the target directory test3.txt file , So mobile is successful
[root@centos7 testdir]# ll
total 0
drwxr-xr-x 2 root root 57 Jan 2 09:04 dir
-rw-r--r-- 1 root root 0 Jan 2 09:03 test1.txt
-rw-r--r-- 1 root root 0 Jan 2 08:57 test2.txt

Backup function

# If test2.txt There is , It will be re ordered to test2.txt, The original files will be backed up
[root@centos7 dir]# cat test1.txt
1
[root@centos7 dir]# cat test2.txt
2
[root@centos7 dir]# mv -b test1.txt test2.txt
mv: overwrite ‘test2.txt’? y
[root@centos7 dir]# ll
total 12
-rw-r--r-- 1 root root 2 Jan 2 09:12 test2.txt
-rw-r--r-- 1 root root 2 Jan 2 09:12 test2.txt~
-rw-r--r-- 1 root root 2 Jan 2 09:12 test3.txt
[root@centos7 dir]# cat test2.txt
1
[root@centos7 dir]# cat test2.txt~
2
# If test3.txt There is , It will be re ordered to test3.txt.bak
[root@centos7 dir]# mv -b --suffix=.bak test2.txt test3.txt
mv: overwrite ‘test3.txt’? y
[root@centos7 dir]# ll
total 12
-rw-r--r-- 1 root root 2 Jan 2 09:12 test2.txt~
-rw-r--r-- 1 root root 2 Jan 2 09:12 test3.txt
-rw-r--r-- 1 root root 2 Jan 2 09:12 test3.txt.bak
[root@centos7 dir]# cat test3.txt
1
[root@centos7 dir]# cat test3.txt.bak
3

This article is from WeChat official account. - The road of technology for migrant workers (jishuroad)

The source and reprint of the original text are detailed in the text , If there is any infringement , Please contact the yunjia_community@tencent.com Delete .

Original publication time : 2021-01-15

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