Hi
I need to search for matching strings in a database and I want to print out all files that matches in "detail", which means that I want the output to contain datum of last saving. I only get the grep function tp print the actual file names which is not enough since the database is to large... (14 Replies)
I have a question about the accuracy of prstat.
I did a 'prstat -t' and it shows 99% of my memory is occupied by oracle.
NPROC USERNAME SIZE RSS MEMORY TIME CPU
194 oracle 343G 340G 99% 86:17.24 56%
However, 'top' shows I still have 7762meg of memory free.
Memory: 16G real, 7762M... (4 Replies)
Hi,
i have to search for a char like that :
export var1="i am not happy /not happy"
with a command like :
grep $var1 file
but this not working with me !!!
thank you in advance. (2 Replies)
Dear Friends,
I have my command output which displays on one row and values are now scrollable (vertical) 3 pages. How do i display those output in three column so that i no need to scroll?
Example:
dcadd$cat components
1.Caluculator
2.Diary
...
...
50.Mobile
51.Battery
..
...... (12 Replies)
Hi ,
I am not familiar with shell programming. I have a requirement like i have two files
.I need to compare the two files by comparing each parameter and i should produce 2 outputs.
1)i have around 35 parameters say i have one parameter name called db_name=dcap in one file and... (7 Replies)
I have an overnight script which runs across a large directory to repair permissions and ownership. I also have this command output the list of files affected so that cron can email these as a log file. Previously I had the command in the form:
find /path/to/files -not -user myname -print -exec... (4 Replies)
Hello guys,
I have been looking around but can't find the answer to my problem:
If the grep command displays no results, print "no results have been found" and increment x. But if the grep command find something, do nothing.
if
echo "no results have been found $x"
x=`expr $x + 1 `... (3 Replies)
Hi, perhaps this is a dumb question.
I'm running queries on mysql and I'm getting tabbed results like these:
mysql> SELECT * from metrics_status WHERE date = '2012-03-30';
<TABLE... (1 Reply)
I have a file like this:
AAEQGAGNQPQH,,,,160,32,,,,
AAGQDYNSPLH,,712,39,,,,,,
AAGREGGNTEAF,26,,,,,,,,4
AAGSPQH,,,,8,5,,,,
AAKKLGQFYNEQF,4,,6,,,7,,,2
AANSGGRYNEQF,,2747,3120,,,,,,
AAQGGVGGELF,,,,5,,12,36,,
AAQGLAGYYEQY,,25,13,,,,,,
AAQRGNEQF,510,2,,,6,,6,,76
AAQTGENSPLH,,16,16,,,,,,
The... (9 Replies)
Discussion started by: xshang
9 Replies
LEARN ABOUT CENTOS
shell-quote
SHELL-QUOTE(1) User Contributed Perl Documentation SHELL-QUOTE(1)NAME
shell-quote - quote arguments for safe use, unmodified in a shell command
SYNOPSIS
shell-quote [switch]... arg...
DESCRIPTION
shell-quote lets you pass arbitrary strings through the shell so that they won't be changed by the shell. This lets you process commands
or files with embedded white space or shell globbing characters safely. Here are a few examples.
EXAMPLES
ssh preserving args
When running a remote command with ssh, ssh doesn't preserve the separate arguments it receives. It just joins them with spaces and
passes them to "$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)