The Joy of Linux commands--md5sum

The md5sum command is used to generate and verify the MD5 value of the file. It verifies the contents of the file bit by bits, and it is commonly used with checking the integrity of the file.

Read the MD5 value of the file

[Email protected] ~]# md5sum/usr/local/sbin/*  >>file.md5[[email protected] ~]# cat FILE.MD5 74fd7e1f2730b5f8353d7a5f417747ef  /usr/local/sbin/demo.sh8bd8f8743b02a33882bca8fcb2234261  /usr/local/ SBIN/ARRAY.SHD7E30C2D897F0FDD9B157E9A5E9FBFBC  /usr/local/sbin/debug.sh

Check that the file is complete

[Email protected] ~]# md5sum-/usr/local/sbin/array.sh:OK/usr/local/sbin/Debug.sh:OK/ Usr/local/sbin/demo.sh:ok
[[email protected] ~]# echo $?
0

Test change a file

[Email protected] ~]# md5sum-/usr/local/sbin/array.sh:OK/usr/local/sbin/Debug.sh:OK/ usr/local/sbin/13~]# echo $? 1

The Joy of Linux commands--md5sum