Old boy Education Daily-May 2, 2017-linux system, accidentally put chmod command permission to get lost, how to solve?

Old boy Education Daily-May 2, 2017-linux system, the chmod command does not have Execute permissions (x permission) or chmod command file permissions of 000, how to solve? There are two ways to resolve this:

[email protected] bin]# CP cp/oldboy/chmod.new

(At this point the Copy CP command file is named Chmod.new, at this time the Chmod.new file has permissions on X, but Chmod.new does not have the chmod command of the common function)

[[email protected] bin]# cd/oldboy/[[email protected] oldboy]# cat/bin/chmod > Chmod.new

(The chmod command file with no X permission to the contents of cat to Chmod.new, at this time chmod.new has the same function as chmod)

[[email protected] oldboy]# lltotal 52-rwxr-xr-x 1 root root 52472 May 1 23:09 chmod.new[[email protected] oldboy]#./chm Od.new +x/bin/chmod

(You can grant x permission to the/bin/chmod command with the Chmod.new file)

Method Two:
Use the file's Access Control List feature to authorize the root user to have X permissions

[Email protected] bin]# setfacl-m u:root:rwx/bin/chmod

(This method uses the Access control list method to implement the root user has the permissions of x)

[Email protected] bin]# chmod +x/bin/chmod

(chmod has access to x right now)

Today is the 40th day of the day to accompany you and look forward to your progress .

For questions and answers, please leave a comment in the blog comments section .
Index of the topic of the previous period
http://lidao.blog.51cto.com/3388056/1914205

This article is from the "Lee blog" blog, make sure to keep this source http://lidao.blog.51cto.com/3388056/1921227

Old boy Education Daily-May 2, 2017-linux system, accidentally put chmod command permission to get lost, how to solve?