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 FREEBSD
atf-sh
ATF-SH(1) BSD General Commands Manual ATF-SH(1)NAME
atf-sh [-s shell] -- interpreter for shell-based test programs
SYNOPSIS
atf-sh script
DESCRIPTION
atf-sh is an interpreter that runs the test program given in script after loading the atf-sh(3) library.
atf-sh is not a real interpreter though: it is just a wrapper around the system-wide shell defined by ATF_SHELL. atf-sh executes the inter-
preter, loads the atf-sh(3) library and then runs the script. You must consider atf-sh to be a POSIX shell by default and thus should not
use any non-standard extensions.
The following options are available:
-s shell Specifies the shell to use instead of the value provided by ATF_SHELL.
ENVIRONMENT
ATF_LIBEXECDIR Overrides the builtin directory where atf-sh is located. Should not be overridden other than for testing purposes.
ATF_PKGDATADIR Overrides the builtin directory where libatf-sh.subr is located. Should not be overridden other than for testing purposes.
ATF_SHELL Path to the system shell to be used in the generated scripts. Scripts must not rely on this variable being set to select a
specific interpreter.
EXAMPLES
Scripts using atf-sh(3) should start with:
#! /usr/bin/env atf-sh
Alternatively, if you want to explicitly choose a shell interpreter, you cannot rely on env(1) to find atf-sh. Instead, you have to hardcode
the path to atf-sh in the script and then use the -s option afterwards as a single parameter:
#! /path/to/bin/atf-sh -s/bin/bash
ENVIRONMENT
ATF_SHELL Path to the system shell to be used in the generated scripts.
SEE ALSO atf-sh(3)BSD September 27, 2014 BSD