Interesting. Of the four answers given, three assumed he wants to loop through the files with that extension.
But he only said he needs to check if the extension exists in the directory or not. That shouldn't require a loop.
you used ls, which is the same as "looping through the files", except that ls "abstracted" the process for you.
with the shell, if he knows what extension he is searching for.
or another way
Hi,
I am newbie in UNIX so please excuse for my questions.
Is there a a way to search for string in files within folder and sub folder in particluar file extensions.
Ex. search for ABC in folder 'A'(including it's sub folders) in html, xml files.
Thanks,
Ani (2 Replies)
Hi need to know if we can write a shell script to find files for a particular format;s ie both .csv and .txt in a particular folder and then copy them to a new folder on a dialy basis. Does anyone know how this can be accomplished?
Thanks,
Sandeep (20 Replies)
Greetings to All ... :b:
I have one root folder containing different other folders within it.
I need to get the list of all different types of file extensions residing in those folders.
Could anyone help me providing some shell script? (1 Reply)
Greetings to all!!:b:
I have one root folder containing several other folders inside it. This tree structure is deep. And the files are of similar extension.
I need to start at the top level and recursively search and rename all the files with say .a extension to .b .
This is the code to... (7 Replies)
unix program to which a directory name will be passed as
parameter. This directory will contain files with various
extensions. This script will create directories with the names of the
extention of the files and then put the files in the
corresponding folder. All files which do not have any... (2 Replies)
I have a file
n06-z30-sr65-rgdt0p25-varp0.25-8x6drw-test.cmod
and I want to get the extension.
At the moment I have
set filextension = `echo $f | awk 'BEGIN {FS="."} {print $2}'`
which of course does not work as there is a point in varp0.25 (13 Replies)
Hi All,
I want to fetch the files based on .done file and display the .csv files and Wil take .csv files for processing.
1.I need to display the .done files from the directory.
2.next i need to search for the .Csv files based on .done file.then move .csv files for the one directory
... (2 Replies)
I'm afraid this is a silly question but I can't figure it out.
I have a script like so...
echo "Enter DRDL Signature Version Number"
read DRDL_Number
mv signature_output.csv SERVICE_OBJECTS_S-$DRDL_Number.csv
The resultant filename does not contain the .csv as follows.... (3 Replies)
I have a specific set (all ending with .bam) of downloaded files in a directory /home/cmccabe/Desktop/NGS/API/2-15-2016. What I am trying to do is use a match to $2 in name to rename the downloaded files. To make things a more involved the date of the folder is unique and in the header of name... (1 Reply)
Discussion started by: cmccabe
1 Replies
LEARN ABOUT DEBIAN
shell-quote
SHELL-QUOTE(1p) User Contributed Perl Documentation SHELL-QUOTE(1p)NAME
shell-quote - quote arguments for safe use, unmodified in a shell command
SYNOPSIS
shell-quote [switch]... arg...
DESCRIPTION
shell-quote lets you pass arbitrary strings through the shell so that they won't be changed by the shell. This lets you process commands
or files with embedded white space or shell globbing characters safely. Here are a few examples.
EXAMPLES
ssh preserving args
When running a remote command with ssh, ssh doesn't preserve the separate arguments it receives. It just joins them with spaces and
passes them to "$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 v5.8.4 2005-05-03 SHELL-QUOTE(1p)