Hi ,
I am using SUN OS Version 5.6.
I have a file that contains records of length 270. when I do 'set nu' in vi editor, I get the count as 86. whereas when I do "wc -l" on the command prompt, it shows the count as only 85. this is very strange. why would the 'wc' show 1 record less. The job... (3 Replies)
First time poster -
I have a huge file and i want to sort and compress it to something more readable
Ex:
FUTNCA01-SL1 DMT8a4 5 3
FUTNCA01-SL1 DMT8a4 5 9
FUTNCA01-SL1 DMT8a4 5 21
FUTNCA01-SL1 DMT8a4 5 22
FUTNCA01-SL1 DMT8a4 5 23
FUTNCA01-SL1 DMT8a4 5 24
FUTNCA01-SL1 DMT8a4 6 2... (13 Replies)
Hello everybody,
My job is to load the data from Oracle table to flat file and from flat file to oracle table using ETL tool Informatica. My flat files are fixed width. In the first phase, it is loading 66351 records into data file through tool. When I checked through wc -l <data filename> it is... (1 Reply)
I would like my script to be able to tell the difference between to lines of input, like:
Input 1:
1 2 3 4 5
Input 2:
1 2 3 4 5 6
I want the script to tell me that the difference between the two lines is the 6. Is there anyway I can have it do this?
Here's an example of what my script... (12 Replies)
hi,
I opened a simple text file by vi. I then started another shell, and did fuser myFile. I expected it to show the pid of the vi session that had that file open, but it just returned a blank.
why would this be?
thanks (4 Replies)
ls -l shows the number of links for each file. Is there a command that will show the link sources for a specific file? Running find on the entire filesystem and doing a little Perl "magic" is the only method I'm aware of. I'm running SunOS 5.8.
Thanks. (6 Replies)
Hi
I am facing strange issue in one direcotry it is not showing year of file,
can you please suggest me wheather there is any limitation on year,
on some other file though it is showing the dates.
Regards,
Manoj. (1 Reply)
Hi All,
My current /usr utilization is 100%.As i don't have another harddisk i decided to delete some unnecessary files under /usr.But,while deleteing it is giving error "it is a readonly filesystem".I checked /etc/mnttab file it is showing the following entry
/dev/lofi/1 /usr hsfs ... (3 Replies)
Hi
i have written a infinite loop which writes to a file log.txt
while
do
echo " file in use " >> log.txt
done
i have started this process in one terminal , from another terminal i issued cp command
cp log.txt log2.txt
i was expecting a File in use message but didnt ?
i have... (6 Replies)
Does anyone know what is the binary file for seeing the last reboot since my wtmpx file has been dumped as of now and i am not able to see the last reboot with the command "last reboot".
Please don't say uptime, since i want to see the last 4-5 reboots for this server.
Thanks in advance (4 Replies)
Discussion started by: aksijain
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)