I want to simply define a custom shell command, for example:
I type abc and it will output some text.
Like:
$ abc
The quick brown fox jumps over the lazy dog.
- How to make it simply in Linux?
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4 Answers
You also should consider learning about bash functions so you would have
function abc () {
echo The quick brown fox jumps over the lazy dog.
}
and as others told you, you could also use bash alias builtin.
You may want to remove the bash-specific function keyword to be portable to other Posix shells.
The main advantage of functions in bash is that they can take some arguments and be more complex than what alias give you.
answered Dec 17, 2012 at 6:19
Basile Starynkevitch
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3 Comments
William Pursell
Note that the keyword
function is not needed and not portable. Simply omit it to work in any Bourne shell.Basile Starynkevitch
Thanks. Added a note about that.
dmckee --- ex-moderator kitten
"omit it to work in any Bourne shell" as long as you don't use any other bashism in the function, so that you are faced with the usual choice between legacy support and spiffy features of the newest, specialest version.
Try alias
alias abc="echo The quick brown fox jumps over the lazy dog."
you can add it into your ~/.bash_profile to make it valid for all sessions.
2 Comments
夏期劇場
Is it permanent? What if i reboot my machine? (or) Is there a setting/config file storing for that alias commands?
Yuanhang Guo
@4lvin yes. In Mac OSX, you can put it into ~/.bash_profile; in Ubuntu or other linux systems, you can put it into ~/.bashrc.
If i have understood your requirement correctly ,you can use alias command for this
alias abc='echo "testing"'
alias abc='echo The quick brown fox jumps over the lazy dog.'
