double square brackets will evaluate condition, and based on true or false flow will work
Single square brackets requires a value to evaluate for eg. if [ $var -eq 0 ]; then ... fi
Your IF syntax will work fine. You can use following to reduce OR:
hi all,
i am new to UNIX. this is my first time using Ubuntu. i need to do this for my fyp.
i am using an artificial neural network model to predict the yield strength of steel. the shell script used to execute this model is as shown here:
#Thomas Sourmail, Cambridge University /... (4 Replies)
I have this script someone very kindly help me write last year which loops through all files in a folder and does a command.
I need to modify it to loop through all sub-folders of a main folder and only perform the command on files modified after Jan 1st 2008. And I need the command to place the... (3 Replies)
Hi users,
I am on a beginner level and just joined this site.
I have created a simple .ksh file in the following manner
cat <<EOF >mfile
#!/bin/ksh
echo "hello world"
EOF
Request for some help with 2 cases
1. now i would like to add a second line after the first echo command... (4 Replies)
I need to replace the line daemon ntpd $OPTIONS in the following script with daemon ntpd $OPTIONS 2>&1 > /var/log/ntpd.log &
what will happen?
The idea of replacing is to capture the output on the console into ntpd.log file.
Will this work?
... (1 Reply)
Hi freinds
I have a small problem I want u to help me in, I have a syslog server and configured it to send me email automatically, I get a small perl script to help me in, and tested it to send alerts to root and it worked successfully without any problems
Now I want to send it outside, I... (4 Replies)
Hi,
I am new to shell programming, and want to know is it possible to change the contents of file using script?
for example, if want to search 2 words and want to replace these words with 2 new words.
Regards,
Manoj (4 Replies)
Hi,
I have xml documents that I want to change a value in, I can do it using sed in a text document but not the xml document. I have read other posts that allow the change between tags but the part I wish to change is only a small part of data with the tags.
e.g.
<?xml version="1.0"... (2 Replies)
Hello,
I have a shell script which calls for an existing script with appropriate parameters. It looks something like this.
--------------------------------------------------------------------------
#!/bin/bash
sh /root/ams_rc stop_shepherd > /dev/null
sleep 30
sh /root/ams_rc... (9 Replies)
I have the records in the format
one row
0009714494919I MY010727408948010 NNNNNN N PUSAAR727408948010 R007YM08705 9602002 S 111+0360832-0937348
I want to get it int the format
0009714494919I MY010727408948010 NNNNNN N PUSAAR727408948010 R007YM08705 9602002 S ... (2 Replies)
Discussion started by: sonam273
2 Replies
LEARN ABOUT CENTOS
service
service(8) System Manager's Manual service(8)NAME
service - run a System V init script
SYNOPSIS
service SCRIPT COMMAND [OPTIONS]
service --status-all
service --help | -h | --version
DESCRIPTION
service runs a System V init script in as predictable environment as possible, removing most environment variables and with current working
directory set to /.
The SCRIPT parameter specifies a System V init script, located in /etc/init.d/SCRIPT. The supported values of COMMAND depend on the
invoked script, service passes COMMAND and OPTIONS it to the init script unmodified. All scripts should support at least the start and
stop commands. As a special case, if COMMAND is --full-restart, the script is run twice, first with the stop command, then with the start
command.
service --status-all runs all init scripts, in alphabetical order, with the status command.
If the init script file does not exist, the script tries to use legacy actions. If there is no suitable legacy action found and COMMAND is
one of actions specified in LSB Core Specification, input is redirected to the systemctl. Otherwise the command fails with return code 2.
FILES
/etc/init.d
The directory containing System V init scripts.
ENVIRONMENT
LANG, TERM
The only environment variables passed to the init scripts.
SEE ALSO chkconfig(8), ntsysv(8), systemd(1), systemctl(8), systemd.service(5)
Jan 2006 service(8)