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When I log in, I see the error:

bash: alias: alias: not found

If I source my .bashrc file, the message appears again.

What is causing this?

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It turns out that a line feed had been removed from ~/.bashrc, giving:

alias ll='ls -alF' alias la='ls -A'
alias l='ls -CF'

Breaking the first line into two commands fixes the error.

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In my case, removing spaces in alias = ls -alF solved the problem.

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If the command has spaces in it, surround it with single or double quotes. – Buttle Butkus Jun 26 at 3:46

I think you can do this:

alias 'll=ls -alF'
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I had the same issue, so the solution is to follow simply rules.

alias alias_name='command '

no other symbols between equal sign.
I had whitespaces between the sign and the source ~/.bashrc always failed for me.
so be attenive

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You can put quotes around the commands you are aliasing. You can even put them around the alias, too.

'llg'='ll | grep'

Newlines are also a problem. Widows-saved .bashrc file caused errors in Ubuntu virtual machine:

command not found

I ran dos2unix .bashrc to convert the line endings, and then everything worked.

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