I have a '|' delimited file and want to remove all the records from the file if the date is greater than a year from sysdate. The layout of the file is as below -
xxxxxxxxxxxxxx|yyyyyy|zzzzzz|2009-12-27-00:00| 000000000|N
xxxxxxxxxxxxxx|yyyyyy|zzzzzz|2010-01-03-00:00| 000000000|N... (4 Replies)
I have a file like below and want to use awk to solve this problem. The record separator is ">". I want to look at each record section enclosed within ">". Find the row with the 2nd and 3rd columns being 0, such as
10 0 0
I need to take the first number which in this case is 10. Then... (15 Replies)
Hi,
I am not sure if this has already been asked (I tried the search but the search was too broad). Basically I want to remove rows based on another file.
So file1 looks like this (tab seperated):
HHN 3 5 5
HUJ 2 2 1
JJJ 3 1 1
JUN 2 1 3
I have another file (file2)... (2 Replies)
Sorry I made a mistake in my last post (output is suppose to be the opposite). Here is a revised post.
Hi,
I am not sure if this has already been asked (I tried the search but the search was too broad). Basically I want to remove rows based on another file.
So file1 looks like this (tab... (3 Replies)
Hi I need a way of removing rows from a txt file that are older than 30 days from today, going by the date in column 2, below is an example from my file. I have tried awk but don't have enough knowledge. I would really appreciate some help.
41982,15/07/2010,H833AB/0,JZ,288... (6 Replies)
I'm trying to move a large folder to an external drive but some files have these weird chars that the external drive won't accept.
Does anyone know any command of any bash script that will look through a given folder and remove any weird chars? (4 Replies)
Hello Everyone,
I am trying to find a way to take a .csv file with 7 columns and a ton of rows (over 600,000) and remove the entire row if the cell in forth column is blank.
Just to give you a little background on why I am doing this (just in case there is an easier way), I am pulling... (3 Replies)
Running SunOs 5.6. Solaris.
I've been able to remove all special characters from a fixed length file which appear in the first column but as a result all subsequent columns have shifted to the left by the amount of characters deleted.
It is a space separated file. Line 1 in input file is... (6 Replies)
Hi,
I have a requirement where I need to delete given number of top and bottom rows in a flat file which has new line as its delimiter.
For ex: if top_rows=2 & bottom_rows=1
Then in a given file which looks like:
New York
DC
LA
London
Tokyo
Prague
Paris
Bombay
Sydney... (7 Replies)
Discussion started by: calredd
7 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)