09-18-2015
There are lots of ways... What operating system and shell are you using?
10 More Discussions You Might Find Interesting
1. UNIX for Dummies Questions & Answers
I have a list of files that I want to compare to another list of files, how do I do that?
The first list will be my known list and hard coded, for example:
mylist="janfile.tar jarfile.jar jan.rpt.Z" etc.
The second list will be found by doing an 'ls' piped to a file:
ls > filelist.dat
... (4 Replies)
Discussion started by: giannicello
4 Replies
2. Shell Programming and Scripting
Hi all,
I need to compare the contents of 2 directories where the file contents are similar and take out the filenames whose contents does not exist within the 2 directories.
Directory1
1
2
3
4
Directory2
54
55
56
57
Does anyone has a script which can do this?
At the end of... (6 Replies)
Discussion started by: manualvin
6 Replies
3. UNIX for Dummies Questions & Answers
Is there any out of box Command in Unix
or is it possible through shell scripting to
copy all the files in a directory in Parallel.
Example. I am doing a COLD database backup. I have the data/dbx directory which has around 1000 data files.
I was thinking is there a way to spawn the copy... (10 Replies)
Discussion started by: simonsimon
10 Replies
4. Shell Programming and Scripting
Hi
*
I have two text files which has the file size, timestamp and the file name. I need to compare these two files and get the differences in the output format. Can anyone help me out with this.
*
cat file1.txt
*474742 Apr 18* 2010 sample.log
*135098 Apr 18* 2010 Testfile
134282 Apr 18* 2010... (7 Replies)
Discussion started by: Sendhil.Kumaran
7 Replies
5. Shell Programming and Scripting
Following is the requirement
In FileA I have the content as follows.
1,2,3
111,222,333
1000,2000,3000
In FileB I have the content as follows.
4,5,6
444,555,666
4000,5000,6000
I need to read FileA and FileB parallely and create the FileC as follows.
1,2,3,4,5,6... (1 Reply)
Discussion started by: kmanivan82
1 Replies
6. Shell Programming and Scripting
Hey guys,
need help with a script I'm trying to write.
Basically I need to compare the contents of a folder called "profiles"
with a list of files called "template".
when the file matches the contents of the folder it needs to set a variable called "checked" to "1"
Cookies to anyone... (4 Replies)
Discussion started by: Scriporium
4 Replies
7. Shell Programming and Scripting
Hi All,
I have a list of files and want to find the difference between each file if there is difference then i want the file name to be printed and log the duplicate files
For example
Size Filename
23 a1
23 a2
23 a3
45 a4
If i diff a1 and a2 and find... (3 Replies)
Discussion started by: wedng.bell
3 Replies
8. Shell Programming and Scripting
Hello guys, first post sorry if I did some mess here =)
Using Ubuntu 14.04lts 64bits server version.
I have a list (url.list) with only URLs to download, one per line, that looks like this:
http://domain.com/teste.php?a=2&b=3&name=1
http://domain.com/teste.php?a=2&b=3&name=2
...... (6 Replies)
Discussion started by: tonispa
6 Replies
9. Shell Programming and Scripting
Hello,
I have two network edgelists with first two columns as nodes and the last column pearson correlation coefficient (PCC). I want to remove the edges from net1 whose edges are common with net2 && (PCC)net2>=(PCC)net1
net1.txt
A B 0.6
A C 0.7
B C 0.7
D C ... (1 Reply)
Discussion started by: Sanchari
1 Replies
10. UNIX for Beginners Questions & Answers
I have two file as given below which shows the ACL permissions of each file. I need to compare the source file with target file and list down the difference as specified below in required output. Can someone help me on this ?
Source File
*************
# file: /local/test_1
# owner: own
#... (4 Replies)
Discussion started by: sarathy_a35
4 Replies
LEARN ABOUT CENTOS
shell-quote
SHELL-QUOTE(1) User Contributed Perl Documentation SHELL-QUOTE(1)
NAME
shell-quote - quote arguments for safe use, unmodified in a shell command
SYNOPSIS
shell-quote [switch]... arg...
DESCRIPTION
shell-quote lets you pass arbitrary strings through the shell so that they won't be changed by the shell. This lets you process commands
or files with embedded white space or shell globbing characters safely. Here are a few examples.
EXAMPLES
ssh preserving args
When running a remote command with ssh, ssh doesn't preserve the separate arguments it receives. It just joins them with spaces and
passes them to "$SHELL -c". This doesn't work as intended:
ssh host touch 'hi there' # fails
It creates 2 files, hi and there. Instead, do this:
cmd=`shell-quote touch 'hi there'`
ssh host "$cmd"
This gives you just 1 file, hi there.
process find output
It's not ordinarily possible to process an arbitrary list of files output by find with a shell script. Anything you put in $IFS to
split up the output could legitimately be in a file's name. Here's how you can do it using shell-quote:
eval set -- `find -type f -print0 | xargs -0 shell-quote --`
debug shell scripts
shell-quote is better than echo for debugging shell scripts.
debug() {
[ -z "$debug" ] || shell-quote "debug:" "$@"
}
With echo you can't tell the difference between "debug 'foo bar'" and "debug foo bar", but with shell-quote you can.
save a command for later
shell-quote can be used to build up a shell command to run later. Say you want the user to be able to give you switches for a command
you're going to run. If you don't want the switches to be re-evaluated by the shell (which is usually a good idea, else there are
things the user can't pass through), you can do something like this:
user_switches=
while [ $# != 0 ]
do
case x$1 in
x--pass-through)
[ $# -gt 1 ] || die "need an argument for $1"
user_switches="$user_switches "`shell-quote -- "$2"`
shift;;
# process other switches
esac
shift
done
# later
eval "shell-quote some-command $user_switches my args"
OPTIONS
--debug
Turn debugging on.
--help
Show the usage message and die.
--version
Show the version number and exit.
AVAILABILITY
The code is licensed under the GNU GPL. Check http://www.argon.org/~roderick/ or CPAN for updated versions.
AUTHOR
Roderick Schertler <roderick@argon.org>
perl v5.16.3 2010-06-11 SHELL-QUOTE(1)