Repeating previously typed commands
0Repeating previously typed commands
To make repeating long commands easy for you, bash stores up to 500 old
commands as part of a command history (basically just a list of old commands).
To see the command history, type history. bash displays a numbered list of
the old commands, including those that you entered during previous logins.
If the command list is too long, you can limit the number of old commands
that you want to see. For example, to see only the 10 most recent commands,
type this command:
history 10
You can repeat a command without knowing its command number. Suppose
you typed more /usr/lib/X11/xdm/xdm-config a few minutes ago and
now you want to look at that file again. To repeat the previous more command,
type the following:
!more
Often you may want to repeat the last command that you just typed, perhaps
with a slight change. For example, you may have displayed the contents of
the directory by using the ls -l command. To repeat that command, type
two exclamation points as follows:
!!
Sometimes you may want to repeat the previous command but add extra
arguments to it. Suppose that ls -l shows too many files. Simply repeat
that command but pipe the output through the more command as follows:
!! | more
bash replaces the two exclamation points with the previous command and
then appends | more to that command.
Here’s the easiest way to recall previous commands: Just press the up-arrow
key, and bash keeps going backward through the history of commands you
previously typed .
it's easy and clear i think :)
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