How to search for multiple domain names availability using bash?

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

score 1 · Accepted Answer · answered Mar 01 '21 at 20:05

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.

score 0 · Answer 2 · answered Mar 01 '21 at 20:01

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

You dropped the `-q` option to `grep` so this will be rather noisy. — tripleee, Mar 01 '21 at 20:07

How to search for multiple domain names availability using bash?

2 Answers2