How to make grep results colored

colorgrep

I have some output of my program:
# php check.php | grep -E "rule_1|rule_4"

I would like results equaling to rule_1 to be red and results equaling to rule_4 to be blue.

Is this possible, because at this moment, everything is colored red.

Best Answer

Try this:

alias egrep="grep -E --color=never"

alias egrep-grey="   GREP_COLOR='1;30' grep -E --color=always"
alias egrep-red="    GREP_COLOR='1;31' grep -E --color=always"
alias egrep-green="  GREP_COLOR='1;32' grep -E --color=always"
alias egrep-yellow=" GREP_COLOR='1;33' grep -E --color=always"
alias egrep-blue="   GREP_COLOR='1;34' grep -E --color=always"
alias egrep-magenta="GREP_COLOR='1;35' grep -E --color=always"
alias egrep-cyan="   GREP_COLOR='1;36' grep -E --color=always"
alias egrep-white="  GREP_COLOR='1;37' grep -E --color=always"

php check.php | egrep "rule_1|rule_4" | egrep-red "rule_1|$" | egrep-blue "rule_4|$"

Related Solutions

How to make (non-gnu-)grep ignore binary files

Building on the previous answer, you can use the "file" command to identify text files, and then limit your grep to only those files. For example:

  find dir -type f -print |
    xargs file |
    grep text |
    cut -f1 -d: |
    xargs grep "expression"

That's:

Find all files in directory "dir"
Pass these as arguments to "file"
Look for output from "file" containing the word "text"
Chop out the first colon-delimited field and use it as a filename
Search these files using grep.

This will fail in the case of filenames containing whitespace or colons, but will otherwise do what you want.

Linux – Send email based on grep results

Take a look to this answer echo based on grep result
It's almost the same, take the answer that better fit your need then suppress the echo No part and remplace the echo yes part by an email command

Regading leading and trailing characters you can use -C options or -A and -B (-C is -A X -B X)

   -A NUM, --after-context=NUM
          Print NUM lines of trailing context after matching lines.  Places a line containing -- between contiguous groups of matches.


   -B NUM, --before-context=NUM
          Print NUM lines of leading context before matching lines.  Places a line containing -- between contiguous groups of matches.

   -C NUM, --context=NUM
          Print NUM lines of output context.  Places a line containing -- between contiguous groups of matches.

if I understand what you want to do, you might like the following exemple

perl webinject.pl > /tmp/webinject_result.txt
if grep --quiet 'TEST CASE FAILED' /tmp/webinject_result.txt;
then
  grep -B 20 -B 2 'TEST CASE FAILED' /tmp/webinject_result.txt | mail someone@domain.tld
fi

Best Answer

Related Solutions

How to make (non-gnu-)grep ignore binary files

Linux – Send email based on grep results

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