How to search for multiple domain names availability using bash? - linux

Question

I'm trying to search for multiple domain names availability with this script but it doesn't work, where's the mistake? thanks
#!/bin/bash
WEB=('madmane1' 'madmane2' 'madmane3' 'madmane4' 'madmane5' 'madmane6' 'madmane7' 'madmane8' 'madmane9')
ELEMENTS=${#WEB[#]}
for (( i=0;i<$ELEMENTS;i++)); do
whois ${WEB[${i}]}$'.com' | egrep -q \
'^No match|^NOT FOUND|^Not fo|AVAILABLE|^No Data Fou|has not been regi|No entri'
if [ $? -eq 0 ]; then
echo "${WEB[${i}]}$'.com' : available"
fi
done
here's the error:
line 9: ^No match|^NOT FOUND|^Not fo|AVAILABLE|^No Data Fou|has not been regi|No entri: command not found

Answer 1

Assigning stuff to an array and then wrecking it by assigning it to a string without quoting seems like the main mistake here, though it's not the reason you are getting a syntax error.
You also want to avoid testing ”$?” to see if a command succeeded or not, an anti-pattern
See also Correct Bash and shell script variable capitalization
The reason for the error message seems to be a space after the backslash, so you are escaping the space instead of the newline, and thus the shell (in some sense correctly) parses the next line as a new command.
#!/bin/bash
web=('madmane1' 'madmane2' 'madmane3' 'madmane4' 'madmane5' 'madmane6' 'madmane7' 'madmane8' 'madmane9')
for domain in "${web[#]}"; do
if whois "$domain.com" |
grep -Eq '^No match|^NOT FOUND|^Not fo|AVAILABLE|^No Data Fou|has not been regi|No entri'
then
echo "$domain.com: available"
fi
done
Going forward, probably try http://shellcheck.net/ before asking for human assistance.

Answer 2

I think I fixed the problem with https://www.shellcheck.net/
here it is now:
#!/bin/bash
WEB=('madmane1' 'madmane2' 'madmane3' 'madmane4' 'madmane5' 'madmane6' 'madmane7' 'madmane8' 'madmane9')
ELEMENTS=${#WEB[#]}
for (( i=0;i<$ELEMENTS;i++)); do
whois "${WEB[${i}]}"$'.com' | grep -E \
'^No match|^NOT FOUND|^Not fo|AVAILABLE|^No Data Fou|has not been regi|No entri'
if [ $? -eq 0 ]; then
echo "${WEB[${i}]}$'.com' : available"
fi
done