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About.com: Common Shell Tools

May 28, 2000, 04:36 (0 Talkback[s])


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"The real power of shell scripting is only fully realized when the shell is used in conjunction with some of the myriad tools which are standard on Unix and Linux systems. In this article, you'll find brief reference documentation for some of the most commonly used tools."

"The cut command is used to dissect a line of text and "pull out" substrings based on a set of rules the user supplies. There are two ways to use cut; the first is to define a delimiter and select a field. Delimiters are a single character and follow the '-d' argument; fields are numbered beginning with 1 and follow the '-f' argument."

"The echo command is probably the most commonly used command in shell scripting; in some Linux configurations, it is built in to the BASH binary; in other distributions, it exists as a separate implementation in the /bin/echo binary. The most commonly supplied argument is '-n' and is used to prevent echo from appending a newline character to the end of its output... A number of escape sequences can also appear in the output strings provided to echo and will have the following effects if the '-e' argument is supplied to the echo command..."

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