Tilde in path doesn't expand to home directory

Question

Say I have a folder called Foo located in /home/user/ (my /home/user also being represented by ~).

I want to have a variable

a="~/Foo" and then do

cd $a

I get -bash: cd: ~/Foo: No such file or directory

However if I just do cd ~/Foo it works fine. Any clue on how to get this to work?

Answer 1

If you use double quotes the ~ will be kept as that character in $a.

cd $a will not expand the ~ since variable values are not expanded by the shell.

The solution is:

eval "cd $a"

Answer 2

You can use $HOME instead of the tilde (the tilde is expanded by the shell to the contents of $HOME). Example:

dir="$HOME/Foo";
cd "$dir";

Answer 3

A much more robust solution would be to use something like sed or even better, bash parameter expansion:

somedir="~/Foo/test~/ing";
cd ${somedir/#\~/$HOME}

or if you must use sed,

cd $(echo $somedir | sed "s#^~#$HOME#")

Answer 4

You can do (without quotes during variable assignment):

a=~/Foo
cd "$a"

But in this case the variable $a will not store ~/Foo but the expanded form /home/user/Foo. Or you could use eval:

a="~/Foo"
eval cd "$a"