Try to create a new command on linux

--This is a volume to try to create a new command on linux.

What does the new command mean? You can create a " newfile.txt " file by typing the newfile command.

――How does it work?

Use the alias command.

Type the newfile command
Run touch newfile.txt behind the scenes
I am creating a " newfile.txt " file.

--Registration command

alias Alias command='command'

--Delete command

unalias alias command

Register the command

※Caution

Please note that alias is reset when you close the terminal screen or log out.

Temporarily register

--Registration

alias newfile='touch newfile.txt'

--Registration confirmation

$ alias | grep newfile
==========
alias newfile='touch newfile.txt'
==========

I was able to register!

--Execute

$ ls
(Nothing was returned)

$ newfile

$ ls
newfile.txt

newfile.txt was done!

Permanently registered

--Registration

vi  ~/.bashrc
==========
add to
alias newfile='touch newfile.txt'
==========

--Login again

exit

--Registration confirmation

$ alias | grep newfile
==========
alias newfile='touch newfile.txt'
==========

I was able to register!

--Execute

$ ls
(Nothing was returned)

$ newfile

$ ls
newfile.txt

newfile.txt was done!

Delete the command

Deletion when registered temporarily

--Registration confirmation

$ alias | grep newfile
==========
alias newfile='touch newfile.txt'
==========

Delete

unalias newfile

--Confirmation of deletion

$ alias | grep newfile
(Nothing is returned)

Temporary deletion when registered permanently

--Registration confirmation

$ alias | grep newfile
==========
alias newfile='touch newfile.txt'
==========

--Temporary deletion

unalias newfile

--Confirmation of deletion

$ alias | grep newfile
(Nothing is returned)

However, the command can be used after logging in again.

Permanent deletion when registered permanently

--Registration confirmation

$ alias | grep newfile
==========
alias newfile='touch newfile.txt'
==========

Delete

vi  ~/.bashrc
==========
Delete
alias newfile='touch newfile.txt'
==========

--Login again

exit

--Confirmation of deletion

$ alias | grep newfile
(Nothing is returned)

Here, the command remains deleted even if you log in again.

reference

-You can also create new commands! Alias command detailed summary [Linux command collection] -Command alias reintroduction to make commands convenient

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