Is there a command that will return the name of the largest file within a directory? If so, can I set the returned filename into a variable? (4 Replies)
Hello every one,
Iam newbie to this forum and shell programming &scripting.
i needed to compare each and every folder of two separate servers.
Actually I have copied some directory structure from one server to second server, to build on second server the files all should be copied... (3 Replies)
hi
ls -l * | sed 's/\+/ /g' | cut -f5 -d " " >out1
ls -l * | sed 's/\+/ /g' | cut -f5 -d " " >out2
diff out1 out2
i tried this it will work fine and i can see difference
but i need a script which should neglect, if the difference b/w files is small
and
it should display... (5 Replies)
Hello,
I am working with KSH on AIX and I have 2 files generated from different sources... as seen below:
FILE1 FILE2
AAA AAA@ABS0001C
BBB BBB@ABS0003D
CCC CCC@ABS0023A
DDD DDD@ABC0145D
EEE EEE@ABS0090A
FFF FFF@ABS0002A
GGG GGG@ABC0150D
HHH
FILE1 is main main data source,... (4 Replies)
I need to get a file size and compare it to a previous day file size. If it's larger or smaller by 50 percent I'll replace the new with the old. I know how to get the file sizes but do not know how to calculate if it's 50 percent difference.
Thanks for your help. (2 Replies)
Hi everyone!
I need to compare two file sizes.
One of them (size) will be stored in a flat file and the other coming from a listed file.
I can now get the first file size using:
SIZE=`ls -l $DOCTYPE | awk '{print $5}'`
1. How can I store this value in a flat file?
2. How... (2 Replies)
I need to write a bash script larger X Y that compares the sizes of two specified files X and Y,
and reports which file is larger. For example, if X is larger, the output should be "File X is larger",
while if Y is larger, the output should be "File Y is larger".
If the files are exactly the... (3 Replies)
Hello,
I have an output file showing database sizes across the 3 environments that I use (LIVE, TEST & DEVELOPMENT).
I am trying to write a script that lets me know if the size of a db on one environment is different to its corresponding db on the other environments.
Here is an example... (4 Replies)
Hi,
I am running a script that connets to a list of servers with SSH and runs a command but I have some servers that are asking for password (authorized keys is not configured properly).
Is there any way to do so that if I get a prompt for password just skip that entry?
my script:
... (1 Reply)
Hi,
I created a skript in ksh which generate a file with semicolon as separator, this is an example of the file a created:
example content file:
hello;AAAA;2014-08-17
hello;BBBB;2014-08-17
hello;CCCC;2014-08-17
I would need to compare the content in of the second column of this file... (3 Replies)
Discussion started by: jmartin
3 Replies
LEARN ABOUT CENTOS
shell-quote
SHELL-QUOTE(1) User Contributed Perl Documentation SHELL-QUOTE(1)NAME
shell-quote - quote arguments for safe use, unmodified in a shell command
SYNOPSIS
shell-quote [switch]... arg...
DESCRIPTION
shell-quote lets you pass arbitrary strings through the shell so that they won't be changed by the shell. This lets you process commands
or files with embedded white space or shell globbing characters safely. Here are a few examples.
EXAMPLES
ssh preserving args
When running a remote command with ssh, ssh doesn't preserve the separate arguments it receives. It just joins them with spaces and
passes them to "$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)