1. Print Working Directory (pwd)
To use this utility
gcc pwd.c -o pwd
./pwd
Working example
2. Print (echo)
To use this utility
gcc echo.c -o echo
./echo Desired text
Working example
3. Copy (cp)
To use this utility
gcc cp.c -o cp
./cp file1 file2
Working example
4. Move (mv)
To use this utility
gcc mv.c -o mv
./mv
Working example