A Linux administrator is currently working in the /var/log directory. They previously navigated from their home directory, /home/admin. The administrator needs to quickly switch back to their previous working directory, /home/admin. Which of the following commands will achieve this?
cd ..
cd .
cd -
cd ~
The correct command to switch to the previous working directory is cd -. In the Bash shell, the hyphen (-) is a special relative path shortcut that refers to the directory stored in the $OLDPWD environment variable, which is updated every time the cd command is successfully executed. The cd .. command would change the directory to the parent directory of /var/log, which is /var. The cd . command would change the directory to the current directory (/var/log), effectively doing nothing. The cd ~ command would change to the current user's home directory, /home/admin, which happens to be the correct destination in this specific scenario, but it does not accomplish the task of switching to the previous directory. The cd - command is the most accurate and direct method for returning to the last directory, regardless of what that directory was.
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