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Full Discussion: Creating a PATH variable
Top Forums Shell Programming and Scripting Creating a PATH variable Post 303027854 by Circuits on Wednesday 26th of December 2018 03:41:22 PM
Old 12-26-2018
Creating a PATH variable

I am new to shell scripting and I ran into a couple lines of code which I don't completely understand:

Code:
PATH=/usr/bin:/bin:/usr/sbin:/sbin:/usr/local/entity/bin
data_dir=/usr/local/entity/project

I believe data_dir to be a more conventional link to a directory. However, I am not sure what PATH is. It also seems like a location but maybe it's multiple possible locations? Does the : signify that the location could be either: /usr/bin, /bin, /usr/sbin or /usr/local/entity/bin? Is the : in this context similar to some function like [ is to the test function?
 

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shells(4)							   File Formats 							 shells(4)

NAME
shells - shell database SYNOPSIS
/etc/shells DESCRIPTION
The shells file contains a list of the shells on the system. Applications use this file to determine whether a shell is valid. See getuser- shell(3C). For each shell a single line should be present, consisting of the shell's path, relative to root. A hash mark (#) indicates the beginning of a comment; subsequent characters up to the end of the line are not interpreted by the routines which search the file. Blank lines are also ignored. The following default shells are used by utilities: /bin/bash, /bin/csh, /bin/jsh, /bin/ksh, /bin/pfcsh, /bin/pfksh, /bin/pfsh, /bin/sh, /bin/tcsh, /bin/zsh, /sbin/jsh, /sbin/sh, /usr/bin/bash, /usr/bin/csh, /usr/bin/jsh, /usr/bin/ksh, /usr/bin/pfcsh, /usr/bin/pfksh, /usr/bin/pfsh, and /usr/bin/sh, /usr/bin/tcsh, /usr/bin/zsh. Note that /etc/shells overrides the default list. Invalid shells in /etc/shells may cause unexpected behavior (such as being unable to log in by way of ftp(1)). FILES
/etc/shells lists shells on system SEE ALSO
vipw(1B), ftpd(1M), sendmail(1M), getusershell(3C), aliases(4) SunOS 5.10 4 Jun 2001 shells(4)
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