Command Line Shortcuts History MAC & LINUX

Monday, 1 April 2013

Command Line Shortcuts History MAC & LINUX

Command Line Shortcuts History

Hash stores a history of commands you've entered,which can be used to repeat commands
Use history command to see list of "remember"command

          $   history
          14 cd /tmp
          15 ls -1
          16 cd
          17cp /etc/passwd .

           ... output truncated ...

History

In Addison to the basic command recall with the arrow keys,the bash history mechanism support a variety of advanced ways of retrieving command from the history list.

!!    repeats last command ,
!char repeats last command that started with char
!num repeats a command by its number in history output

To view command with the history number,use the history command.

Other slightly more advanced history tricks include:
!?abc     repeats last command that contains(as opposed to ?started with?) abc
!-n    repeats a command entered n commands back

Use ^old^new to repeats the last command with old changed to new,for example:

[student@stationX ~]$ cp filter.c /use/local/src/project
[student@stationX ~]$ ^filter^fronted
cp filter.c /use/local/src/project

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