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Full Discussion: Creating a PATH variable
Top Forums Shell Programming and Scripting Creating a PATH variable Post 303027888 by joeyg on Thursday 27th of December 2018 11:51:24 AM
Old 12-27-2018
PATH is something that tells the computer where to look for programs, and in what order to search for the programs.
By programs, I am referring to many of the commands you use in unix - cp, rm, mv, cat - are actually programs.
So, if you type 'cat myfile', unix would look in /usr/bin folder first to find the program cat.exe; then it will do what cat is programmed for, display the contents of the parameter you typed, myfile

Defining data_dir is a common programming step. This avoids the need to specify it everywhere in your script, and (MOST IMPORTANTLY) allows you to adjust the location just once rather than throughout your script.

thus, in your script you could have the following commands (if the archiv_dir was also defined):
cat $data_dir"/workfile.txt"
mv $data_dir"/workfile.txt" $archv_dir"/workfile.arc"
 

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LEARN ABOUT SUSE

cat

CAT(1)								   User Commands							    CAT(1)

NAME

       cat - concatenate files and print on the standard output

SYNOPSIS

       cat [OPTION]... [FILE]...

DESCRIPTION

       Concatenate FILE(s), or standard input, to standard output.

       -A, --show-all
	      equivalent to -vET

       -b, --number-nonblank
	      number nonempty output lines

       -e     equivalent to -vE

       -E, --show-ends
	      display $ at end of each line

       -n, --number
	      number all output lines

       -s, --squeeze-blank
	      suppress repeated empty output lines

       -t     equivalent to -vT

       -T, --show-tabs
	      display TAB characters as ^I

       -u     (ignored)

       -v, --show-nonprinting
	      use ^ and M- notation, except for LFD and TAB

       --help display this help and exit

       --version
	      output version information and exit

       With no FILE, or when FILE is -, read standard input.

EXAMPLES

       cat f - g
	      Output f's contents, then standard input, then g's contents.

       cat    Copy standard input to standard output.

AUTHOR

       Written by Torbjorn Granlund and Richard M. Stallman.

REPORTING BUGS

       Report cat bugs to bug-coreutils@gnu.org
       GNU coreutils home page: <http://www.gnu.org/software/coreutils/>
       General help using GNU software: <http://www.gnu.org/gethelp/>

COPYRIGHT

       Copyright (C) 2009 Free Software Foundation, Inc.  License GPLv3+: GNU GPL version 3 or later <http://gnu.org/licenses/gpl.html>.
       This is free software: you are free to change and redistribute it.  There is NO WARRANTY, to the extent permitted by law.

SEE ALSO

       The  full  documentation  for cat is maintained as a Texinfo manual.  If the info and cat programs are properly installed at your site, the
       command

	      info coreutils 'cat invocation'

       should give you access to the complete manual.

GNU coreutils 7.1						     July 2010								    CAT(1)
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