Linux basic commands --- enable open shell command

enable

      instruction to disable or enable activation of the internal shell commands. Scope of this command: RedHat, RHEL, Ubuntu, CentOS, Fedora.

1 , grammar

      enable [-a]  [-dnps]  [-f filename]  [name ...]

 

2 , the list of options

Options	Explanation
-a	Show all internal shell commands comprises activating and closing
-n	Closes the specified shell command, if not specified, then the show has been closed order
-f	Download the new command shell commands from a file in
-d	Delete the previous command
-p	Show all active shell commands
-s	Output strictly follow posix standard definition of command

 

3 , examples

1) standard command output posix

[root @ localhost ~] # enable -s // display strictly follow posix command standard than -a lot less results options enable . enable : enable break enable continue enable eval enable execen’a enable exit enable export enable readonly enable return enable set enable shift enable source enable times enable trap enable unset

2) Close the command 

[root@localhost ~]# enable -n break                  //关闭break命令 You have new mail in /var/spool/mail/root [root@localhost ~]# enable –n                         //显示已经关闭的命令 enable -n break

 

     

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