UNIX® Shells by Example, Third Edition

Appendix A. Useful UNIX Utilities for Shell Programmers

at—at, batch—execute commands at a later time

awk—pattern scanning and processing language

banner—make posters

basename—with a directory name delivers portions of the pathname

bc—processes precision arithmetic

bdiff—compares two big files

cal—displays a calendar

cat—concatenates and displays files

chmod—change the permissions mode of a file

chown—changes owner of file

clear—clears the terminal screen

cmp—compares two files

compress—compress, uncompress, zcat compress, uncompress files, or display expanded files

cp—copies files

cpio—copy file archives in and out

cron—the clock daemon

crypt—encodes or decodes a file

cut—removes selected fields or characters from each line of a file

date—displays ...