Powerful shell commands

1. CTRL + W Delete the last word

2. CTRL + u delete a row

3. CD-Return to the last working directory

4. Cd ~ Return to the Home Directory

5 .! $

! $ Is a special environment variable, which represents the last string of the previous command.

Example:

Mkdir mydir

Mvmydir yourdir

CD yourdir

It is equivalent:

Mkdir mydir

MV! $ Yourdir

CD! $

6. sudo !!

Run the previous command as root.

Example:

For example, if we use apt-Get In ubuntu to install the software package as root, we may often forget to add sudo before apt-Get. Every time you have to add sudo and re-type this line of command, you can easily use sudo !! Done.

Note:

In Shell, sometimes a long command is entered, which can be used! Xxx to repeat the latest command. For example, if you have input Vim/home/Jibo/tiger before, you can use it directly next time! Vim repeats the last recent Vim command.

7. CD-

Return to the last directory.

For example, if the current directory is/home/a, use CD ../B to switch to/home/B. In this case, you can execute the CD-command repeatedly to switch back and forth between/home/a and/home/B.

8. 'alt +. "And <ESC> + ."

You can repeat the parameters of the last command line.

9. ^ old ^ new

Replace some strings in the previous command.

For example:

Echo "wandreful", in fact, wants to output echo "wonderful ". As long as ^ A ^ o is enough, it will be of great help for spelling long commands.

10. Du-S * | sort-N tail

List the top 10 files in the current directory.

11. Echo "LS-L" | at midnight

Run a command at a certain time.