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If I execute

cal 2013

in terminal, it echoes the calendar for the year 2013. For the matter of fun, I'd like the terminal to echo

This year won't come.

How should I do this? I tried adding it as an alias to .bashrc, but I cannot create aliases with spaces.
Any ideas?

EDIT:

The final solution:

echo "cal() { if [[ \$@ > \"2012\" ]]; then command echo \"This year won't come.\"; else command cal \"\$@\"; fi; }" >> ~/.profile && source ~/.profile
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Enclose the function definition in single quotes (echo 'cal() {...}') and you can get rid of all the backquotes. – glenn jackman May 20 '11 at 23:50
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1 Answer

up vote 3 down vote accepted

Stick the function in your .profile or .bash_profile

Note it is a function, not a shell script. You can also just paste that into your shell prompt. Putting it in a profile allows future login sessions to get that function defined.

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One problem though, when I restart terminal, it doesn't work anymore, I need to do "source .profile" again. Any ideas how to make it permanent? – RiMMER May 21 '11 at 13:09
RiMMER: Hmm. Your terminal must not be giving you a login shell, which is a bit strange. You can put it in .bashrc then, which will be used for all interactive shells. – Seth Robertson May 21 '11 at 19:57
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