Running the command
cd \`echo -n "~"\`
I get the following error:
bash: cd: ~: No such file or directory
What's the problem if 'cd ~' works fine?
The issue is that bash does not do an additional expansion after command substitution. So while cd ~ is expanded the way you want, cd $(echo '~') does not.
There is a keyword called eval that was created for this sort of situation--it forces the command line to be expanded (evaluated) again. If you use eval on that line, it forces the ~ to be expanded into the user directory, even though the normal time for expansion has already passed. (Because the ~ does not exist until the echo command is run, and at that point, it's too late for expansion.)
eval cd `echo -n "~"`