Linux Shells by Example

Appendix A. Useful Linux/UNIX Utilities for Shell Programmers

apropos—searches the what is database for strings

arch—prints the machine architecture (see uname -m)

at—at, atq, atrmbatch—execute commands at a later time

awk (gawk)—pattern scanning and processing language

banner—make posters

basename—with a directory name delivers portions of the pathname

bash—Gnu Bourne Again Shell

bc—processes precision arithmetic

biff [ny]—be notified if mail arrives and who it is from

cal—displays a calendar

cat—concatenates and displays files

chfn—change the finger information

chmod—change the permissions mode of a file

chown—change the user and group ownership of files

chsh—change your login shell

clear—clears the terminal screen

cmp—compares two files