Issue in shell script

Question

I'm getting below error while running a shell script. Kindly help [intention for the script is to check whether current OS version (RHEL/CentOS) is less that 7 or not]

================================== ERROR ==============================

./test.sh: line 5: 7]: No such file or directory
PHP 5.4 will be installed by default

=======================================================================

#!/bin/bash
# Script Name: test.sh

VERSION=`cat /etc/redhat-release|awk '{print $4}'|cut -d "." -f1`
if [ "$VERSION" < "7" ]
then
echo "PHP 5.4 need to be installed separately"

    else
    echo "PHP 5.4 will be installed by default"

fi`

it is hard to understand your question. please rewrite it so we could see the script properly. — stzahi
– stzahi, Commented Aug 9, 2016 at 7:48
Use -lt instead of <. Also use [[]] instead of [] to prevent the shell from interpreting < and > as file descriptors/operators. — 123
– 123, Commented Aug 9, 2016 at 7:52
@stzahi that was (`) which came by default while pasting the code on forum. — SJP
– SJP, Commented Aug 9, 2016 at 8:29

heemayl · Accepted Answer · 2016-08-09 07:51:58Z

1

The [ (test) builtin (and external one) (and also keyword [[) does not support <, > style arithmetic comparisons. You need the arithmetic comparison operator (( or use -lt (less than):

(( "$VERSION" < 7 ))
[ "$VERSION" -lt 7 ]

answered Aug 9, 2016 at 7:51

heemayl

42.5k10 gold badges86 silver badges87 bronze badges

Sign up to request clarification or add additional context in comments.

1 Comment

SJP Over a year ago

Thank You so much to make me understand where i was wrong. Once again thank you.

P.... · Accepted Answer · 2016-08-09 08:07:41Z

0

#!/bin/bash
# Script Name: test.sh

VERSION=$(awk '{print $7}' /etc/redhat-release|cut -d "." -f1)
if [ "$VERSION" -lt 7 ];then

    echo "PHP 5.4 need to be installed separately"

else
    echo "PHP 5.4 will be installed by default"

fi

Note:

Avoid using backtick. you can use var=$(command)
For integer comparison , use -lt ,-gt,-eq ,-ne for comparison.
Check your code syntax at Shell-check. You could have solved this yourself.

edited Aug 9, 2016 at 8:07

answered Aug 9, 2016 at 7:52

P....

18.6k3 gold badges36 silver badges55 bronze badges

1 Comment

123 Over a year ago

Some explanation would be useful for OP.

Collectives™ on Stack Overflow

Issue in shell script

2 Answers 2

1 Comment

1 Comment

Your Answer

Hot Network Questions

Collectives™ on Stack Overflow

2 Answers 2

1 Comment

1 Comment

Your Answer

Sign up or log in

Post as a guest

Related