Positional Parameters in the Bash ShellJan 31, 2011, 21:05 (0 Talkback[s])
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"Special built-in environmental variables are positional parameters which hold command-line arguments to positions with the names 1,2,3,4, etc. which are indicated by $1,$2,$3,$4, etc. Argument $0 is the name of the script. These parameters are named positional because within the script the reference is to the position they occur on the command line.
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