That globally suppresses all error messages.
You can suppress them for specific commands only, for example
Suppress the expected.
If unexpected things happen then error messages are helpful, otherwise you might get wrong output silently.
Today I am using on that specific line , instead of whole script executing. But
Quote:
If unexpected things happen
this line making me to think , if for some reason that FS is not mounted during patching then I am missing that important message . Any way I can avoid ? I guess answer would be NO.
Hi,
I'm creating a shell script to dynamically create a recreate controlfile for an Oracle database. I need to read a cold backup file system, and make some changes to these files.
Let's say for argument sake the directory name is /ebsprod_c/oradata and it looks like this:... (6 Replies)
Noob question!
I know almost nothing so far, and I'm trying to teach myself from books, on a typical command line without using scripts how would I append output from a sort to a file in a completely different directory?
example:
If I'm sorting a file in my documents directory but I... (2 Replies)
Hello,
I know find can be prevented from recursing into directories with something like the following...
find . -name .svn -prune -a type d
But how can I completely prevent directories of a certain name (.svn) from being displayed at all, the top level and the children?
I really... (2 Replies)
Hi all........
Plss do help me.......in a big trouble... :wall::wall::wall:
I have 3 directories named as :1. /home/shuchi/source
2./home/shuchi/destination
3./home/shuchi/filter
now the problem is /home/shuchi/source has say 2 files with extension .txt as given below :
A.txt
Code:
... (0 Replies)
Hi all........
Plss do help me.......in a big trouble... :wall::wall::wall:
I have 3 directories named as :1. /home/shuchi/source
2./home/shuchi/destination
3./home/shuchi/filter
now the problem is /home/shuchi/source has say 2 files with extension .txt as given below :
A.txt
msisdn ... (5 Replies)
Dear All,
I am using find command
find /my_rep/*/RKYPROOF/*/*/WDM/HOME_INT/PWD_DATA -name rk*myguidelines*.pdf -print
The problem i am facing here is find /my_rep/*/
the directory after my_rep could be mice001, mice002 and mice001_PO, mice002_PO
i want to ignore mice***_PO directory... (3 Replies)
i am trying to recursively save a remote FTP server but exclude the files immediately under a directory directory1
wget -r -N ftp://user:pass@hostname/directory1
I want to keep these which may have more files under them
directory1/dir1/file.jpg
directory1/dir2/file.jpg... (16 Replies)
I am trying to apply an awk action over multiple files in a directory. It is a simple action, I want to print out the 1st 2 columns (i.e. $1 and $2) in each tab-separated document and output the result in a new file *.pp
This is the awk that I have come up with so far, which is not giving me a... (6 Replies)
I am using aix. I would like to ignore the /u directory. I tried this but it is not working.
find / -type f -type d \( -path /u \) -prune -o -name '*rpm*' 2>/dev/null
/u/appx/ls.rpm
/u/arch/vim.rpm (4 Replies)
Discussion started by: cokedude
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)