06-20-2011
The best way to optimize this would be to only run it once, and just use the result as many times as you want... but makefiles make this difficult with their recursive variables that re-re-re-evaluate every single time no matter what. Supposedly "simple variables" don't, but I haven't had any luck convincing a simple variable to be a simple variable and not re-re-re-evaluate n times.
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Hi,
I have this following script below. Its searching a log file for 2 string and if found then write the strings to success.txt and If not found write strings to failed.txt . if one found and not other...then write found to success.txt and not found to failed.txt.
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can we optimize this command ?
sed 's#AAAA##g' /study/i.txt | sed '1,2d' | tr -d '\n\' > /study/i1.txt;
as here i am using two files ...its overhead..can we optimise to use only 1 file
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Hi,
I have to assign a value for a varaiable based on a Input. I have written the below code:
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then
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Here is my code. What it does is it reads an input file (input.txt which contains roughly 2,000 search phrases) and searches a directory for files that contains the search phrase. The directory contains roughly 1900 files and 84 subdirectories. The output is a file (output.txt) that shows only the... (23 Replies)
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6. Shell Programming and Scripting
WARNING=${1}
CRITICAL=${2}
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sample data.file:
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LEARN ABOUT OSF1
pam_env.conf
PAM_ENV.CONF(5) Linux-PAM Manual PAM_ENV.CONF(5)
NAME
pam_env.conf - the environment variables config file
DESCRIPTION
The /etc/security/pam_env.conf file specifies the environment variables to be set, unset or modified by pam_env(8). When someone logs in,
this file is read and the environment variables are set according.
Each line starts with the variable name, there are then two possible options for each variable DEFAULT and OVERRIDE. DEFAULT allows and
administrator to set the value of the variable to some default value, if none is supplied then the empty string is assumed. The OVERRIDE
option tells pam_env that it should enter in its value (overriding the default value) if there is one to use. OVERRIDE is not used, "" is
assumed and no override will be done.
VARIABLE [DEFAULT=[value]] [OVERRIDE=[value]]
(Possibly non-existent) environment variables may be used in values using the ${string} syntax and (possibly non-existent) PAM_ITEMs may be
used in values using the @{string} syntax. Both the $ and @ characters can be backslash escaped to be used as literal values values can be
delimited with "", escaped " not supported. Note that many environment variables that you would like to use may not be set by the time the
module is called. For example, HOME is used below several times, but many PAM applications don't make it available by the time you need it.
The "#" character at start of line (no space at front) can be used to mark this line as a comment line.
EXAMPLES
These are some example lines which might be specified in /etc/security/pam_env.conf.
Set the REMOTEHOST variable for any hosts that are remote, default to "localhost" rather than not being set at all
REMOTEHOST DEFAULT=localhost OVERRIDE=@{PAM_RHOST}
Set the DISPLAY variable if it seems reasonable
DISPLAY DEFAULT=${REMOTEHOST}:0.0 OVERRIDE=${DISPLAY}
Now some simple variables
PAGER DEFAULT=less
MANPAGER DEFAULT=less
LESS DEFAULT="M q e h15 z23 b80"
NNTPSERVER DEFAULT=localhost
PATH DEFAULT=${HOME}/bin:/usr/local/bin:/bin
:/usr/bin:/usr/local/bin/X11:/usr/bin/X11
Silly examples of escaped variables, just to show how they work.
DOLLAR DEFAULT=$
DOLLARDOLLAR DEFAULT= OVERRIDE=$${DOLLAR}
DOLLARPLUS DEFAULT=${REMOTEHOST}${REMOTEHOST}
ATSIGN DEFAULT="" OVERRIDE=@
SEE ALSO
pam_env(8), pam.d(5), pam(7)
AUTHOR
pam_env was written by Dave Kinchlea <kinch@kinch.ark.com>.
Linux-PAM Manual 09/19/2013 PAM_ENV.CONF(5)