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Shell Programming and Scripting
Need to understand how the line in perl program works as shell commend
Post 302997197 by digioleg54 on Tuesday 9th of May 2017 01:18:05 PM
05-09-2017
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10 More Discussions You Might Find Interesting
1. Shell Programming and Scripting
Now I am just getting frustrated and confused... if anyone has some advice on how this anomoly is occurring I would greatly appreciate it.
cat helpme.txt | awk 'NR<5{printf("%-20s %-20d %-20d %-20.1f\n","hello",$1,$2,$3)}' | sort -rk4
This line works fine in solo - reads the three fields from... (4 Replies)
Discussion started by: nortypig
4 Replies
2. Shell Programming and Scripting
Hello ,
I want to run some shell scripts in my perl script. I need to read the script's name from a file ( this file includes the name of all the scripts) and run the script one by one.. Please let me know how to go ..
Thanks in advance,
Radha (5 Replies)
Discussion started by: s123.radha
5 Replies
3. Shell Programming and Scripting
How to call a perl script in shell program / shell scripting.
PLS HELP ME (2 Replies)
Discussion started by: hravisankar
2 Replies
4. Shell Programming and Scripting
so in unix this command works works and shows me a list of directories
find . -name \*.xls -exec dirname {} \; | sort -u | > list.txt
but when i try running a perl script to run this command
my $query = 'find . -name \*.xls -exec dirname {} \; | sort -u | > list.txt';... (2 Replies)
Discussion started by: kpddong
2 Replies
5. Shell Programming and Scripting
Hi is there a way that i can convert this simple perl program into shell script
#!usr/bin/perl -w
use strict;
use warnings;
open INPUTFILE, "uniqprobecoordinates.out" || die "canot open the file $!";
open OUTPUTFILE, ">", "1_4reads.out";
while(<INPUTFILE>)
{
chomp;
... (3 Replies)
Discussion started by: bhargavpbk88
3 Replies
6. Shell Programming and Scripting
Hi, the following command works in the terminal no problem.
samtools view -h rawlib.bam | perl -ne '{ @line = split( /\s+/ ); $match = 0; while( $line =~ /(\d+)M/g ) { $match = $match + $1 } if( $match >= 80 || $_ =~ /^\@/ ) { print $_ } }' | java -Xmx12G -jar... (8 Replies)
Discussion started by: jdilts
8 Replies
7. Shell Programming and Scripting
Please help me understand how sort -k3,3 -k 4,4 short* works , is it sorting 3 and 4 th field ? what is the use of specifying 3,3 and 4,4 in sort and what is actually does and i see sort -k3 short* and sort -k3,3 -k 4,4 short* giving the same output.
Sort output attached
Please help (2 Replies)
Discussion started by: Antony Ankrose
2 Replies
8. Programming
co
#! /usr/bin/perl
use strict;
use warnings;
use diagnostics;
my $amount=""; my $bain; ; my $code="";
my $date;my $day;my $line; my $mo; my $LNUM = 0;
my $xyz=""; my $yr;
$yr = 2015;
my $F; my @F;
while (<>) {
chop;
++$LNUM;
@F = split(';');
if ( $F eq "Date" )... (1 Reply)
Discussion started by: hpk
1 Replies
9. Shell Programming and Scripting
I wish to replace "\\n" with a single white space.
The below does the job on command-line:
$ echo '/fin/app/scripts\\n/fin/app/01/sql' | sed -e 's#\\\\n# #g';
/fin/app/scripts /fin/app/01/sql
However, when i have the same code to a shell script it is not able to get me the same output:... (8 Replies)
Discussion started by: mohtashims
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10. Shell Programming and Scripting
I am still learning shell scripting. Recently I see a function for read configuration. But some of special character make me confused. I checked online to find answer. It was not successful. I post the code here to consult with expert or guru to get better understanding on these special characters... (3 Replies)
Discussion started by: duke0001
3 Replies
LEARN ABOUT LINUX
chkconfig
CHKCONFIG(8) System Manager's Manual CHKCONFIG(8) NAME
chkconfig - enable or disable system services SYNOPSIS
chkconfig -t|--terse [names] chkconfig -s|--set [name state] chkconfig -e|--edit [names] chkconfig -c|--check name [state] chkconfig -l|--list [--deps] [names] chkconfig -A|--allservices chkconfig -a|--add [names] chkconfig -d|--del [names] DESCRIPTION
chkconfig is used to manipulate the runlevel links at boot time (see init.d(7)). It can be thought of as a frontend to insserv(8). Chk- config can run in six different modes: terse list mode, set mode, edit mode, list mode, add mode and delete mode. The last three modes were added for compatiblity reasons. TERSE LIST MODE
This mode lists the state of the specified services, or all known services if no service name was provided. Every printed line consists of the name of the service and the runlevels the service is configured for at the moment. If it is configured in no runlevel, off is used instead, if it is configured in the runlevels defined as a default by the start script, on is used. If the service is an enabled inetd or xinetd service, inetd and xinetd are used. Inetd/xinetd services are configured in /etc/inetd.d and /etc/xinetd.d, respectively. You can use the -A or --allservices parameter to get all services (even the boot.*-services) listed. If chkconfig is called without arguments, all services are listed in terse mode. SET MODE
Set mode is used to configure at which runlevel a service should be started. The arguments must be specified as pairs of service name and new state. You can use on and off as special states to select the default set of runlevels or to disable a service completely. You can use inetd or xinetd to configure a service managed by the inetd/xinetd daemons. Insserv can calculate dependencies for only one service at the same time. To work around this limitation imposed by insserv, chkconfig uses the '-f' option of insserv when it reads the list of services from standard input. Note that --force switches off all dependency checks and could lead to depending services no longer working, use with care. If no services are specified, chkconfig reads lines from standard input. Each line must consist of a service/state pair. As this is exactly the output of the terse list mode, this can be used to reconfigure a service specification saved by a former run. If the option -f or --force is also given, insserv is called with a '-f' option. EDIT MODE
This mode is a combination of the terse list mode and set mode. It writes the state of all specified services (or all known services, if no service was provided) into a temporary file, starts an editor and re-configures all services to reflect the states of the changed tempo- rary file. CHECK MODE
This mode can be used to check the state of a service. chkconfig exits with a return code of '0' if the service is enabled in all of the specified runlevels, otherwise the exit status is '1'. If chkconfig is called with only a service name the current runlevel of the system is used for checking. LIST MODE
List mode prints for each specified service a line that consists of the service name and for runlevels zero to six on or off depending if the service will be started or not. on will be printed in bright green if the output is written to a terminal. If the --deps option is given, the names of the services that must be started before this service is appended to each line. The inetd/xinetd services are listed in extra sections. You can use the -A or --allservices parameter to get all services (even the boot.*-services) listed. ADD MODE
Calls insserv to enable a service and uses list mode to display the new setting afterwards. DEL MODE
Same as add mode, but disable the service. OTHER OPTIONS
When no service names are given on the command line, chkconfig defaults to all known services excluding those that are not enabled in run- levels 1 to 6 and start with 'boot.'. Use the --allservices or -A option if you want to see such services as well. EXAMPLES
chkconfig list the runlevel configuration of all known services chkconfig apache list the runlevel configuration of the apache web server chkconfig -t apache xntpd list the runlevel configuration of the apache web server and the network time protocol daemon. chkconfig apache on configure the apache web server to be started on next boot time. chkconfig apache 5 configure the apache web server to be started only if the system reaches runlevel 5. chkconfig apache 35 configure the apache web server for runlevel 3 and 5. chkconfig apache on xntpd off configure two services chkconfig finger xinetd configure a xinetd service chkconfig -A >~root/chkconfig.save backup the current configuration chkconfig -s <~root/chkconfig.save restore the configuration chkconfig -e apache xntpd change the runlevel configuration interactively chkconfig -e change the runlevel configuration of all services interactively FILES
/etc/init.d/ path to the boot script base directory as required by the Linux Standard Base Specification (LSB). /etc/inetd.d/ path to the inetd services. See the inetd manpage to find out how to enable this feature. /etc/xinetd.d/ path to the xinetd services. SEE ALSO
init.d(7), init(7), inetd(8) xinetd(8) insserv(8) COPYRIGHT
2003 SuSE Linux AG, Nuernberg, Germany. AUTHOR
Michael Schroeder <mls@suse.de> Oct 2006 CHKCONFIG(8)