Url always ends with 8 random characters.
I can easily grep https://websitef.com/ with
grep https://websitef.com/ test.txt
but cant figure out how to get those 8 random characters that come after
This is what it looks like in file:
..."num_comments": 16, "url": "https://websitef.com/vkl6owav", "_has_fetched": true.....
If your input is JSON, you may want to consider using a JSON-specific tool.
Let' consider your test file:
$ cat file ..."num_comments": 16, "url": "https://websitef.com/vkl6owav", "_has_fetched": true.....
To grep the string that you want:
$ grep -Po '(?<=https://websitef.com/)\w+' file vkl6owav
\w+ matches a string of word characters.
(?<=https://websitef.com/) is a look-behind that restricts the match to characters that follow the string
https://websitef.com/. This requires GNU grep.
If GNU grep is not available,
sed can be used:
$ sed -En 's|.*https://websitef.com/([[:alnum:]]+).*|\1|p' file vkl6owav
If you wanted the whole URL, not just the random string:
$ grep -o 'https://websitef.com/[[:alnum:]]*' file https://websitef.com/vkl6owav