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
basename—with a directory name delivers portions of the pathname
bc—processes precision arithmetic
biff [ny]—be notified if mail arrives and who it is from
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
clear—clears the terminal screen
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