Master Linux Shell Navigation: cd, pwd, and Handy Keyboard Shortcuts

Displaying the Current Directory

Use pwd to print the absolute path of the working directory, for example /home/xiaochao/Download.

Changing Directories with cd

Relative path: cd Download # enters the Download folder under the current directory.

Absolute path: cd /var/log # jumps directly to /var/log.

Current directory symbol: cd . # stays in the current folder.

Parent directory: cd .. # moves up one level.

Two levels up (zsh only): cd ... # attempts to go up two levels; not supported by bash.

Special Symbols

Tilde ( ~) expands to the user's home directory ( $HOME), e.g., /home/xiaochao. Running cd without arguments is equivalent to cd ~.

Hyphen ( -) returns to the previous directory, mirroring the “back” button in graphical file managers. Example sequence:

cd /home/xiaochao/Download
cd /home/xiaochao
cd -   # back to /home/xiaochao/Download
cd -   # back to /home/xiaochao

Executing Multiple Commands

Pipe ( |) passes the output of the left command to the right one, e.g., ls | wc -l counts files in the current directory.

Logical AND ( &&) runs the second command only if the first succeeds, e.g., aa && ls.

Background ampersand ( &) runs the first command in the background while still waiting for it to finish before starting the second, e.g., aa & ls.

Logical OR ( ||) runs the second command in parallel with the first, e.g., aa || ls.

Useful Ctrl Shortcuts

Ctrl+A

– move cursor to the beginning of the line. Ctrl+E – move cursor to the end of the line. Ctrl+L – clear the terminal screen (same as clear). Ctrl+U – delete everything before the cursor on the current line. Ctrl+Y – paste the text removed by Ctrl+U. Ctrl+R – search command history interactively. Ctrl+C – terminate the running foreground process. Ctrl+D – send an EOF (end‑of‑file) signal, often closing the terminal. Ctrl+Z – suspend the current process and move it to the background.

Other Common Shell Commands

$?

– exit status of the last command. !$ – last argument of the previous command. !! – repeat the previous command. man ascii – view the ASCII table. >file.txt – create or truncate file.txt (shorter than touch). du -s * | sort -n | tail – list the ten largest items in the current directory. ssh user@server bash < script.sh – execute a local script on a remote host without copying it.

convert input.png -gravity NorthWest -background transparent -extent 720x200 output.png

– resize an image with ImageMagick. fgrep -r "Hello World" ./* – recursively search for the string "Hello World" in the current directory. locate – find files by name (requires mlocate and periodic updatedb updates).