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In bash, environmental variables will tab-expand correctly when placed after an echo command, for example:
echo $HOME
But after cd or cat, bash places a \ before the $ sign, like so:
cd \$HOME
If I use a variable as the second argument to a command, it won't expand at all:
cp somefile $HOM
What mysterious option do I have in my .bashrc or .inputrc file that is causing me such distress?
828
The easiest way to set environment variables in Bash is to use the “export” keyword followed by the variable name, an equal sign and the value to be assigned to the environment variable.
Bash also supports some basic type declaration using the declare option, and bash variables are case sensitive.
Under bash shell: To list all the environment variables, use the command " env " (or " printenv "). You could also use " set " to list all the variables, including all local variables.
setenv is similar to the set command, that also sets an environment variable's value. However, unlike set, setenv also "exports" this environment variable to any subshells. In this way, it is the equivalent of the bash command export.
What you're describing is a "feature" introduced in bash 4.2. So you don't have any mysterious option causing you distress, but just "intended" behaviour.
I find this very annoying since I preferred it the way it used to be and haven't found any configuration options yet to get the earlier behaviour back. Playing with complete options as suggested by other answers didn't get me anywhere.
160
Try complete -r cd to remove the special programmatic completion function that many Linux distributions install for the cd command. The function adds searching a list of of directories specified in the CDPATH variable to tab completions for cd, but at the expense of breaking the default completion behavior.
See http://www.gnu.org/software/bash/manual/bashref.html#Programmable-Completion for more gory details.
4
For the second instance, you can press ESC before tab to solve it.
I don't know the solution to your problem, but you could look in /etc/bash_completion or the files under /etc/bash_completion.d to determine what commands use autocompletion and how.
help complete
Might also be helpful.
3
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