xargs transforms text into arguments. These two commands are equivalent, for instance:
Code:
cat a b c
echo a b c | xargs cat
If you leave -exec off of find it just does its default action instead, which is, print every filename on a separate line. If you feed that into xargs commandname, it will run commandname with the filenames as arguments. If it's too many filenames to fit into one call, it will run commandname several times.
So, find without xargs:
Code:
find ... -exec something '{}' '+'
find with xargs:
Code:
find ... | xargs something
The version with -exec is preferable if you can, because spaces and quote-characters in filenames and paths can confuse xargs. -exec has no such problem, to the point that find is a useful tool for removing files which somehow ended up with humanly untypable names.
Last edited by Corona688; 09-21-2012 at 12:43 PM..
I've made an awk command that works successfully.
However I'd like to add one character to it.
For example instead of /what_i_have_now/
I'd like to change just ONE field to the opposite with an exclamation point.
Like this: ! /what_i_have_now/
My question, where am I supposed to place... (1 Reply)
I wish to seach a Dir for a specific file, once the file is found i will perform additional logic. If the file is not found within two hours, i would like to exit.
Logically, I'm looking for the best way to approach this
Thanks for any assistance in advance.
Note: I'm using a C shell and... (2 Replies)
Hello All,
I looking for a way to verify the correction of shell script syntax.
Is there any switch like -c in perl which do this in shell ?
Thank You. (1 Reply)
Hi,
I am a unix newbie. I need to write a script to check wheteher another script is still running. If it is, then sleep for 30m and then check again if the script is running. If the script has stopped running then, I need to come out of the loop.
I am using RHEL 5.2 (2 Replies)
hello everyone
i am beginner on shell scripting .and i am working on my project work on ad hoc network
i wrote a batch (.sh) to do a looping and execute a tcl script i wrote before in each iteration ..but i got this problem "
syntax error near unexpected token `('... (1 Reply)
Hello i have question that i want check syntax from my script shell with sh -n filename
but it's not show something even i have wrong syntax in my file. why can this happened or any other way to check it?
i use on header of file :
#!/bin/sh
thx before :) (7 Replies)
#!/bin/bash
if ; then
echo "Lipsa IP";
exit;
fi
i=1
ip=$1
while ; do
if ; then
rand=`head -$i pass_file | tail -1`
user=`echo $rand | awk '{print $1}'`
pass=`echo $rand | awk '{print $2}'`
CMD=`ps -eaf | grep -c mysql`
if ; then
./mysql $ip $user $pass &
else
sleep 15... (6 Replies)
Discussion started by: galford
6 Replies
LEARN ABOUT DEBIAN
pam-script
PAM-SCRIPT(7) Miscellaneous Information Manual PAM-SCRIPT(7)NAME
pam-script - a PAM module that can invoke scripts within the PAM stack.
SYNOPSIS
pam-script.so [onerr=(success|fail)][dir=/some/path/]
DESCRIPTION
pam-script allows you to execute scripts during authorization, passwd changes, and on session opening or closing.
Such scripts can perform necessary tasks or influence the outcome of the PAM stack. For example, if the following entry was included in
pam.conf
sshd auth required pam_script
then if the script, pam_script_auth, exits with a non-zero value this would cause the user to be denied SSH access to the machine.
OPTIONS
A summary of options is included below.
onerr=(success|fail)
the default behavior if the module can not find or execute the script. The default is to fail if the option is not given.
dir=/some/path/
where to find the pam-scripts to invoke for each of the various module-types as described below. The default is dir=/usr/share/lib-
pam-script if not given.
List of scripts
pam_script_auth
Executed under auth which handles the authentication stage of establishing the user via some challenge-response (i.e. username/pass-
word)
pam_script_acct
invoked under account module-type for non-authentication based account management.
pam_script_passwd
invoked under passwd for changing the password tokens.
pam_script_ses_open
invoked when a session is first opened.
pam_script_ses_close
run after a session is first closed.
All the scripts will be passed several environment variables: PAM_USER, PAM_RUSER, PAM_RHOST, PAM_SERVICE, PAM_AUTHTOK, PAM_TTY, and
PAM_TYPE referring to the module-type. The pam_script.so arguments in the pam.conf will be passed on the command line, which can be
used to modify the script behavior.
FILES
/lib/security/pam_script.so - the PAM module
/usr/share/libpam-script - where the scripts should be placed by default
VERSION
pam-script 1.1.5
SEE ALSO PAM(7) and the PAM "The System Administrators' Guide"
AUTHOR
pam-script was written by Jeroen Nijhof <jeroen@jeroennijhof.nl>
with some additions and modifications by R.K. Owen, Ph.D. <rkowen@nersc.gov>.
This manual page was written by R.K. Owen <rkowen@nersc.gov>,
for the Debian project (but may be used by others).
August 22, 2007 PAM-SCRIPT(7)