I have this files:
./frm/lf_mt1_cd.Ic_cell_template.attr
./die/addgen_tb_pumd.Ic_cell_template.attr
./min_m1_n.Ic_cell_template.attr
When I use:
awk -F\/ '{print NF}'
Would result to:
3
3
2
I would like to list the files with 3 fields on it. Any Suggestions? (1 Reply)
Hi!
How can I print out a specific range of rows, like "cat file | awk NR==5,NR==9", but in the END-statement?
I have a small awk-script that finds specific rows in a file and saves the line number in an array, like this:
awk '
BEGIN { count=0}
/ZZZZ/ {
list=NR
... (10 Replies)
Hi, I am n00b to shell scripting and I am learning Ksh, sed and awk. I have a requirement and need your help.
1) How to read a specific section of a file. I have a file and I want to read the contents between say "Page Number:1" to "End of Page 1"
2) Within the section of the file that was... (2 Replies)
I have searched the forum for this - forgive me if I missed a previous post.
I have the following file:
blah blah blah
blah blah blah
blah blah blah
blah blah blah
blah blah blah
alter table "informix".esc_acct add constraint (foreign key (fi_id)
references "informix".fi ... (5 Replies)
Hello friends,
I searched in forums for similar threads but what I want is to have a single awk code to perform followings;
I have a big log file going like this;
...
7450494 1724465 -47 003A98B710C0
7450492 1724461 -69 003A98B710C0
7450488 1724459 001DA1915B70 trafo_14:3
7450482... (5 Replies)
Hi friends,
This is sed & awk type question.
I have a text file which has numbers spread all over the file. I want to sum the series of numbers whenever i find it and produce an output file with the sum. For example
###start of input text file ####
abc
def
ghi
1
2
3
4
kjld
random... (3 Replies)
Hello,
I have to a add 2 lines to /etc/sudoers file under this section below, can someone please suggest script to add these two lines when execute this remotely on to a multiple servers.
before
## Allow root to run any commands anywhere
root ALL=(ALL) ALL
After
## Allow root... (2 Replies)
Hi there,
I have a script that I've used to find errors in my Minecraft Server logs. But I'd like to refine that script to be more useful.
Here is the script:
grep -n "SEVERE" /minecraft/server.log | awk -F":" '{print $1-2 "," $1+10 "p"}' | xargs -t -i sed -n {} /minecraft/server.log >>... (15 Replies)
In the awk I have a very large tab-delimeted file that I am trying to extract the DP= value put it in $16 and add
specific text to $16 with . (dot) in $11-$15 and $18. Only the lines (there are several) that have the formating below in file
will have an empty $16. Other lines will be in a... (6 Replies)
Discussion started by: cmccabe
6 Replies
LEARN ABOUT CENTOS
shell-quote
SHELL-QUOTE(1) User Contributed Perl Documentation SHELL-QUOTE(1)NAME
shell-quote - quote arguments for safe use, unmodified in a shell command
SYNOPSIS
shell-quote [switch]... arg...
DESCRIPTION
shell-quote lets you pass arbitrary strings through the shell so that they won't be changed by the shell. This lets you process commands
or files with embedded white space or shell globbing characters safely. Here are a few examples.
EXAMPLES
ssh preserving args
When running a remote command with ssh, ssh doesn't preserve the separate arguments it receives. It just joins them with spaces and
passes them to "$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)