May 2000
Beginner
761 pages
18h 20m
English
Content preview from Linux Shells by Example
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10.10. Command Substitution
10.10.1. Backquotes
A string or variable can be assigned the output of a Linux command by placing the command in back quotes. This is called command substitution. (On the keyboard, the back quotes are normally below the tilde character.) If the output of a command is assigned to a variable, it is stored as a wordlist or array. (See "Wordlists and Command Substitution" .)
Example 10.77.
1 > echo The name of my machine is `uname -n`. The name of my machine is stardust. 2 > echo The present working directory is `pwd`. The present working directory is /home/stardust/john. 3 >set d = `date` > echo $d Tue Mar 28 14:24:21 PDT 2000 |
Explanation
The Linux command uname -n is enclosed in back quotes. When the shell encounters ...
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