Portable shell programming: an extensive collection of bourne shell examples
Traditionally, books on shell programming present the shell as the user interface to UNIX. This complete guide shows how to use the shell to develop shell scripts, using the shell more like a programming language than a command interpreter. Covers shell syntax, portability on different UNIX systems, using shell scripts to catch or ignore signals, executing commands using the remote shell command, and using the shell's redirection syntaxes. For software development engineers, system administrators, and QA test engineers who work with UNIX computer systems.
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answer assigned backslash bin/sh Bourne shell BSD systems Chapter command is executed command line copy current directory current shell delete dev/null double quotes DownShift echo command echo Usage environment esac Examples of Shell exec exit status expr command file descriptor file name file redirection filter find command following command following example shows getopts command grep command HP-UX hyphen intl loop mand matches metacharacters mkdir newline null command option parameter list parse passed PATH variable pattern portable positional parameters POSIX process ID process name read command redirect the standard remote shell remote shell command remove rsh host sed script shell function shell script shift command signal single quotes space specify standard error standard input standard output statement StrCmp subshell System V systems SystemType temporary file terminal test command ULTRIX UNIX systems variable name whitespace wildcard characters xargs