[SOLVED] Bash Install Errors

TBotNik · 09-20-2018, 12:36 PM

All,

Due to all the issues I've encountered with MySQL at:

https://www.linuxquestions.org/quest...ms-4175637410/

I've downloaded all the tar and deb files from 5.5 to 8.0, so have been writing a BASH script to install each version to find where it actually breaks.

Problem is I'm getting errors from my script at this section:

Code:

ver=$1;
echo "Ver=> $ver";
if [ $ver >= "5.5" ] && [ $ver < "6" ]; then 
	src_dir='/home/path/MySQL/5.5+/';
elif [[ $ver >= "6" ] && [ $ver < "7" ]]; then 
	src_dir='/home/path/MySQL/6.0/';
elif [[ $ver -ge "7" && $ver -lt "8" ]]; then 
	src_dir='/home/path/MySQL/7.0/';
elif [ $ver -ge "8" ]; then 
	src_dir='/home/path/MySQL/8.0/';
else
	echo "No correct version entered!";
	exit;
fi

You can see I've tried double brackets and the "-ge", "-lt" vs ">=", "<" the other and always get errors, so need some help on the syntax here, cause not figuring it out.

Output & Errors are:

Quote:

bash /Scripts/MySQL/mysql_ins.sh 5.5
Ver=> 5.5
/Scripts/MySQL/mysql_ins.sh: line 8: [: 5.5: unary operator expected
/Scripts/MySQL/mysql_ins.sh: line 10: [: missing `]'
/Scripts/MySQL/mysql_ins.sh: line 12: [: missing `]'
/Scripts/MySQL/mysql_ins.sh: line 14: [: 5.5: integer expression expected
No correct version entered!

Cheers!
TBNK

scasey · 09-20-2018, 01:10 PM

According to the results of a web search for "unary operator expected", the variable should be quoted in line 8 (guessing at line numbers here)...and probably always.

Can you not see the missing ]'s in lines 10 and 12? We can.

You can't compare a non-integer value to an integer on line 14

Try using a case instead of attempting ranges of numbers, given that there are only four correct input values.

and add set -x to the beginning of your script to see what bash sees.

BW-userx · 09-20-2018, 01:28 PM

yes, your if statements are not even constant. use [[ ]] or [ ] and if spliting them between and && they stay constant

Code:

if [[ $var1 -eq '4' ]] && [[ $var2 == 'yo' ]] ; then ...

for binary, string comparisons, and single and double brackets
http://tldp.org/LDP/abs/html/comparison-ops.html

TBotNik · 04-03-2020, 03:10 PM

Thanks all marking solved