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Full Discussion: Error when executing script
Operating Systems Linux Red Hat Error when executing script Post 302996111 by cero on Wednesday 19th of April 2017 05:36:10 AM
Old 04-19-2017
Hi,

the construct $(command) is called command substitution and evaluates to the output of command and you use it correctly for the assignment of the variables DAY, MONTH and YEAR. You do not want to use command substitution when you assign the values for DIR1 and DIR2.
Code:
#!/bin/bash

DAY=$(date +%d)
MONTH=$(date +%b)
YEAR=$(date +%Y)
DIR1=$MONTH$YEAR"_Blast_BC01"
DIR2=$MONTH$YEAR"_Blast_BC15"

echo $DIR1
echo $DIR2

 

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MELD(1) 						      General Commands Manual							   MELD(1)

NAME
meld - Visual diff and merge tool for the GNOME Desktop SYNOPSIS
meld [options] meld [options] FILE1 meld [options] DIR1 meld [options] FILE1 FILE2 [FILE3] meld [options] DIR1 DIR2 [DIR3] DESCRIPTION
Meld is a graphical diff viewer and merge application for the Gnome desktop. It supports 2 and 3-file diffs, recursive directory diffs, diffing of directories under version control (Arch, Bazaar, Codeville, CVS, Darcs, Git, Mercurial, Monotone, RCS), as well as the ability to manually and automatically merge file differences. OPTIONS
--auto-compare, -a Automatically compare all differing files on startup. --diff FILE1|DIR1 FILE2|DIR2 [FILE3|DIR3] Create a diff tab for the given files or directories. Note that "meld --diff FILE1 FILE2" is functionally equivalent to "meld FILE1 FILE2". However, the --diff argument can be given multiple times for one invocation of meld which allows the user to automatically initiate multiple diffs when meld starts. See examples below. --help, -h Print application help and usage. --LABEL=<label>, -L <label> Set application window title to <label>. --version Print application version and exit. EXAMPLES
meld Run meld without initiating a diff. meld FILE1 Initiate a diff between FILE1 and the version-controlled copy of FILE1. meld DIR1 Initiate a recursive diff between DIR1 and the version-controlled copy of DIR1. meld FILE1 FILE2 Initiate a diff between FILE1 and FILE2. meld FILE1 FILE2 FILE3 Initiate a 3-way diff between FILE1, FILE2, and FILE3. meld DIR1 DIR2 Initiate a recursive diff between directory DIR1 and DIR2. meld DIR1 DIR2 DIR3 Initiate a recursive 3-way diff between directory DIR1, DIR2, and DIR3. meld --diff FILE1 FILE2 --diff FILE3 FILE4 Initiate a diff between FILE1 and FILE2, and a separate diff between FILE3 and FILE4. BUGS
If you find a bug, please report it at https://bugzilla.gnome.org/buglist.cgi?product=meld or mail a description of the issue to meld- list@gnome.org. AUTHORS
See the AUTHORS text file in meld's source code (http://git.gnome.org/browse/meld/tree/AUTHORS). 26 Sept 2010 MELD(1)
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