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When I was using openSUSE 11.3, it came with several aliases already set up. Two that I used a lot were + for pushd . and - for popd. Now on Debian, I can't figure out how to create the second one. alias -=popd tries to read -= as a command option to alias. I've tried putting quotes (both single and double) around it, and preceding it with a backslash, but I just keep getting error messages. Any suggestions?
Thanks
try this:
alias -- -=popd
worked at least for me:
usr@srv % alias -- -=echo
usr@srv % - test
test
-- marks the end of options; everything after it is arguments. For example, logger foo -x bar would log "foo bar" and treat -x as an option, while logger -- foo -x bar would treat it as an ordinary word in the message "foo -x bar".
Apr 24, 2011 at 16:58
-- indicates that no more options follow on the command line, following -'s aren't interpreted as options. So this allows you to cat files that start with a - ;-)
In bash you can create functions named as such:
+() { pushd "$@"; }
-() { popd "$@"; }
$@ expands to all arguments given to the function or script. Unquoted it works the same way as $*. When inside double quotes, however, it expands to exactly the same words as originally given, without any additional splitting.
Apr 24, 2011 at 17:05
$@ expands to all the parameters passed to the function (equivalent to "$1" "$2" ...). For more information, do man bash and search for Special Parameters.
Apr 24, 2011 at 17:05