bash ignorecase match pattern in file and color that line, print all to screen

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1















I want is to cat a log file and highlight certain lines with color based on a pattern match but to ignore case. For example:



  • When the log file has the word success then make that line green.

  • When it finds error make that line red etc.

This is what I have so far. It is based on cat and awk (although when I used man awk I got man for gawk instead). I am using Debian Jessie.



 #!/bin/bash

[ $# -ge 1 -a -f "$1" ] && logfile="$1" || logfile="-"
cat $logfile | awk '
/install/ print "33[32m" $0 "33[39m"
/success/ print "33[32m" $0 "33[39m"
/status/ print "33[33m" $0 "33[39m"
/info/ print "33[33m" $0 "33[39m"
/error/ print "33[31m" $0 "33[39m"
/fail/ print "33[31m" $0 "33[39m"
'


I have used all manner of stuff, but I end up with all my text in 1 colour, no colour, or the case is not being ignored. Things like IGNORECASE=1 don't seem to work.



I am happy to use something else, as I just pinched this script from another question. Below is exactly what I want in case someone wants to suggest a new script.



  1. use a command followed by a filename and print the contents to the terminal (using bash would be ideal)

  2. in my script I would like to add strings to match and make those lines in a log/text file a certain color when printed to the screen. eg. find the word error and make that line red

  3. ignore case for the words I want to match, eg. find the word error, ERROR, or any combination of upper lower case, like Error, or ERRor etc. Then print that line to the screen in a red color.

The idea is to be able to easily spot important parts in some of my backup, and things like apache access logs or whatever. I intend to find the important key words I am after and then simply adding those in my script.



Below is a snippet of the beginning and end of one of log files as an example:



INFO: tar attempt number 0
/home/user/domains/
/home/user/domains/website.com/
/home/user/domains/website.com/logs/
/home/user/domains/website.com/logs/Apr-2015.tar.gz.4
/home/user/domains/website.com/logs/Apr-2015.tar.gz
/home/user/domains/website.com/logs/Apr-2015.tar.gz.1
/home/user/domains/website.com/logs/Apr-2015.tar.gz.3
/home/user/domains/website.com/logs/Apr-2015.tar.gz.2
/home/user/domains/website.com/public_html/
/home/user/domains/website.com/public_html/api.php
/home/user/domains/website.com/public_html/index.html
/home/user/domains/website.com/public_html/favicon.ico
/home/user/domains/website.com/public_html/favicon1.ico
SUCCESS: website tar exists.
INFO: DB backup dump, attempt number 0
SUCCESS: DB backup file created.
/home/user/dakka_backups/user_db-Thu.2015-04-30.sql
INFO: CN Website and DB backed up on Thu.2015-04-30.









share|improve this question
























  • Can you share a snippet of your logfile also ?

    – amisax
    Jul 15 '15 at 4:05











  • I've added an example to the end of my question. I was intending to check out a few logs like apache access logs, ssh logs etc and define a few key words I want to have coloured. So ultimately I wanted to use this against all kinds of log files.

    – dakka
    Jul 15 '15 at 4:52















1















I want is to cat a log file and highlight certain lines with color based on a pattern match but to ignore case. For example:



  • When the log file has the word success then make that line green.

  • When it finds error make that line red etc.

This is what I have so far. It is based on cat and awk (although when I used man awk I got man for gawk instead). I am using Debian Jessie.



 #!/bin/bash

[ $# -ge 1 -a -f "$1" ] && logfile="$1" || logfile="-"
cat $logfile | awk '
/install/ print "33[32m" $0 "33[39m"
/success/ print "33[32m" $0 "33[39m"
/status/ print "33[33m" $0 "33[39m"
/info/ print "33[33m" $0 "33[39m"
/error/ print "33[31m" $0 "33[39m"
/fail/ print "33[31m" $0 "33[39m"
'


I have used all manner of stuff, but I end up with all my text in 1 colour, no colour, or the case is not being ignored. Things like IGNORECASE=1 don't seem to work.



I am happy to use something else, as I just pinched this script from another question. Below is exactly what I want in case someone wants to suggest a new script.



  1. use a command followed by a filename and print the contents to the terminal (using bash would be ideal)

  2. in my script I would like to add strings to match and make those lines in a log/text file a certain color when printed to the screen. eg. find the word error and make that line red

  3. ignore case for the words I want to match, eg. find the word error, ERROR, or any combination of upper lower case, like Error, or ERRor etc. Then print that line to the screen in a red color.

The idea is to be able to easily spot important parts in some of my backup, and things like apache access logs or whatever. I intend to find the important key words I am after and then simply adding those in my script.



Below is a snippet of the beginning and end of one of log files as an example:



INFO: tar attempt number 0
/home/user/domains/
/home/user/domains/website.com/
/home/user/domains/website.com/logs/
/home/user/domains/website.com/logs/Apr-2015.tar.gz.4
/home/user/domains/website.com/logs/Apr-2015.tar.gz
/home/user/domains/website.com/logs/Apr-2015.tar.gz.1
/home/user/domains/website.com/logs/Apr-2015.tar.gz.3
/home/user/domains/website.com/logs/Apr-2015.tar.gz.2
/home/user/domains/website.com/public_html/
/home/user/domains/website.com/public_html/api.php
/home/user/domains/website.com/public_html/index.html
/home/user/domains/website.com/public_html/favicon.ico
/home/user/domains/website.com/public_html/favicon1.ico
SUCCESS: website tar exists.
INFO: DB backup dump, attempt number 0
SUCCESS: DB backup file created.
/home/user/dakka_backups/user_db-Thu.2015-04-30.sql
INFO: CN Website and DB backed up on Thu.2015-04-30.









share|improve this question
























  • Can you share a snippet of your logfile also ?

    – amisax
    Jul 15 '15 at 4:05











  • I've added an example to the end of my question. I was intending to check out a few logs like apache access logs, ssh logs etc and define a few key words I want to have coloured. So ultimately I wanted to use this against all kinds of log files.

    – dakka
    Jul 15 '15 at 4:52













1












1








1








I want is to cat a log file and highlight certain lines with color based on a pattern match but to ignore case. For example:



  • When the log file has the word success then make that line green.

  • When it finds error make that line red etc.

This is what I have so far. It is based on cat and awk (although when I used man awk I got man for gawk instead). I am using Debian Jessie.



 #!/bin/bash

[ $# -ge 1 -a -f "$1" ] && logfile="$1" || logfile="-"
cat $logfile | awk '
/install/ print "33[32m" $0 "33[39m"
/success/ print "33[32m" $0 "33[39m"
/status/ print "33[33m" $0 "33[39m"
/info/ print "33[33m" $0 "33[39m"
/error/ print "33[31m" $0 "33[39m"
/fail/ print "33[31m" $0 "33[39m"
'


I have used all manner of stuff, but I end up with all my text in 1 colour, no colour, or the case is not being ignored. Things like IGNORECASE=1 don't seem to work.



I am happy to use something else, as I just pinched this script from another question. Below is exactly what I want in case someone wants to suggest a new script.



  1. use a command followed by a filename and print the contents to the terminal (using bash would be ideal)

  2. in my script I would like to add strings to match and make those lines in a log/text file a certain color when printed to the screen. eg. find the word error and make that line red

  3. ignore case for the words I want to match, eg. find the word error, ERROR, or any combination of upper lower case, like Error, or ERRor etc. Then print that line to the screen in a red color.

The idea is to be able to easily spot important parts in some of my backup, and things like apache access logs or whatever. I intend to find the important key words I am after and then simply adding those in my script.



Below is a snippet of the beginning and end of one of log files as an example:



INFO: tar attempt number 0
/home/user/domains/
/home/user/domains/website.com/
/home/user/domains/website.com/logs/
/home/user/domains/website.com/logs/Apr-2015.tar.gz.4
/home/user/domains/website.com/logs/Apr-2015.tar.gz
/home/user/domains/website.com/logs/Apr-2015.tar.gz.1
/home/user/domains/website.com/logs/Apr-2015.tar.gz.3
/home/user/domains/website.com/logs/Apr-2015.tar.gz.2
/home/user/domains/website.com/public_html/
/home/user/domains/website.com/public_html/api.php
/home/user/domains/website.com/public_html/index.html
/home/user/domains/website.com/public_html/favicon.ico
/home/user/domains/website.com/public_html/favicon1.ico
SUCCESS: website tar exists.
INFO: DB backup dump, attempt number 0
SUCCESS: DB backup file created.
/home/user/dakka_backups/user_db-Thu.2015-04-30.sql
INFO: CN Website and DB backed up on Thu.2015-04-30.









share|improve this question
















I want is to cat a log file and highlight certain lines with color based on a pattern match but to ignore case. For example:



  • When the log file has the word success then make that line green.

  • When it finds error make that line red etc.

This is what I have so far. It is based on cat and awk (although when I used man awk I got man for gawk instead). I am using Debian Jessie.



 #!/bin/bash

[ $# -ge 1 -a -f "$1" ] && logfile="$1" || logfile="-"
cat $logfile | awk '
/install/ print "33[32m" $0 "33[39m"
/success/ print "33[32m" $0 "33[39m"
/status/ print "33[33m" $0 "33[39m"
/info/ print "33[33m" $0 "33[39m"
/error/ print "33[31m" $0 "33[39m"
/fail/ print "33[31m" $0 "33[39m"
'


I have used all manner of stuff, but I end up with all my text in 1 colour, no colour, or the case is not being ignored. Things like IGNORECASE=1 don't seem to work.



I am happy to use something else, as I just pinched this script from another question. Below is exactly what I want in case someone wants to suggest a new script.



  1. use a command followed by a filename and print the contents to the terminal (using bash would be ideal)

  2. in my script I would like to add strings to match and make those lines in a log/text file a certain color when printed to the screen. eg. find the word error and make that line red

  3. ignore case for the words I want to match, eg. find the word error, ERROR, or any combination of upper lower case, like Error, or ERRor etc. Then print that line to the screen in a red color.

The idea is to be able to easily spot important parts in some of my backup, and things like apache access logs or whatever. I intend to find the important key words I am after and then simply adding those in my script.



Below is a snippet of the beginning and end of one of log files as an example:



INFO: tar attempt number 0
/home/user/domains/
/home/user/domains/website.com/
/home/user/domains/website.com/logs/
/home/user/domains/website.com/logs/Apr-2015.tar.gz.4
/home/user/domains/website.com/logs/Apr-2015.tar.gz
/home/user/domains/website.com/logs/Apr-2015.tar.gz.1
/home/user/domains/website.com/logs/Apr-2015.tar.gz.3
/home/user/domains/website.com/logs/Apr-2015.tar.gz.2
/home/user/domains/website.com/public_html/
/home/user/domains/website.com/public_html/api.php
/home/user/domains/website.com/public_html/index.html
/home/user/domains/website.com/public_html/favicon.ico
/home/user/domains/website.com/public_html/favicon1.ico
SUCCESS: website tar exists.
INFO: DB backup dump, attempt number 0
SUCCESS: DB backup file created.
/home/user/dakka_backups/user_db-Thu.2015-04-30.sql
INFO: CN Website and DB backed up on Thu.2015-04-30.






shell-script text-processing awk logs






share|improve this question















share|improve this question













share|improve this question




share|improve this question








edited Jan 13 at 22:14









Rui F Ribeiro

39.7k1479132




39.7k1479132










asked Jul 15 '15 at 1:39









dakkadakka

646411




646411












  • Can you share a snippet of your logfile also ?

    – amisax
    Jul 15 '15 at 4:05











  • I've added an example to the end of my question. I was intending to check out a few logs like apache access logs, ssh logs etc and define a few key words I want to have coloured. So ultimately I wanted to use this against all kinds of log files.

    – dakka
    Jul 15 '15 at 4:52

















  • Can you share a snippet of your logfile also ?

    – amisax
    Jul 15 '15 at 4:05











  • I've added an example to the end of my question. I was intending to check out a few logs like apache access logs, ssh logs etc and define a few key words I want to have coloured. So ultimately I wanted to use this against all kinds of log files.

    – dakka
    Jul 15 '15 at 4:52
















Can you share a snippet of your logfile also ?

– amisax
Jul 15 '15 at 4:05





Can you share a snippet of your logfile also ?

– amisax
Jul 15 '15 at 4:05













I've added an example to the end of my question. I was intending to check out a few logs like apache access logs, ssh logs etc and define a few key words I want to have coloured. So ultimately I wanted to use this against all kinds of log files.

– dakka
Jul 15 '15 at 4:52





I've added an example to the end of my question. I was intending to check out a few logs like apache access logs, ssh logs etc and define a few key words I want to have coloured. So ultimately I wanted to use this against all kinds of log files.

– dakka
Jul 15 '15 at 4:52










1 Answer
1






active

oldest

votes


















3














Awk has a function called 'tolower':



cat $logfile | awk '
tolower($0) ~ /install/ print "33[32m" $0 "33[39m"; next;
tolower($0) ~ /success/ print "33[32m" $0 "33[39m"; next;
tolower($0) ~ /status/ print "33[33m" $0 "33[39m"; next;
tolower($0) ~ /info/ print "33[33m" $0 "33[39m"; next;
tolower($0) ~ /error/ print "33[31m" $0 "33[39m"; next;
tolower($0) ~ /fail/ print "33[31m" $0 "33[39m"; next;
print;
'


With Bash, you can use shopt -s nocasematch for case insensitive pattern matching. eg.



mystring="AbCdEfG"
shopt -s nocasematch
if [[ $mystring == abcdefg ]] ; then
echo "is a match!!"
fi





share|improve this answer

























  • Almost! That displays only what I am matching, is there a way to match everything else without changing the colours? I want the log to print out normally like when you use cat filename except what my script matches should be in different colours...hope that made sense?

    – dakka
    Jul 15 '15 at 4:46











  • @dakka - I've updated the answer.

    – LukeM
    Jul 15 '15 at 4:53











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1 Answer
1






active

oldest

votes








1 Answer
1






active

oldest

votes









active

oldest

votes






active

oldest

votes









3














Awk has a function called 'tolower':



cat $logfile | awk '
tolower($0) ~ /install/ print "33[32m" $0 "33[39m"; next;
tolower($0) ~ /success/ print "33[32m" $0 "33[39m"; next;
tolower($0) ~ /status/ print "33[33m" $0 "33[39m"; next;
tolower($0) ~ /info/ print "33[33m" $0 "33[39m"; next;
tolower($0) ~ /error/ print "33[31m" $0 "33[39m"; next;
tolower($0) ~ /fail/ print "33[31m" $0 "33[39m"; next;
print;
'


With Bash, you can use shopt -s nocasematch for case insensitive pattern matching. eg.



mystring="AbCdEfG"
shopt -s nocasematch
if [[ $mystring == abcdefg ]] ; then
echo "is a match!!"
fi





share|improve this answer

























  • Almost! That displays only what I am matching, is there a way to match everything else without changing the colours? I want the log to print out normally like when you use cat filename except what my script matches should be in different colours...hope that made sense?

    – dakka
    Jul 15 '15 at 4:46











  • @dakka - I've updated the answer.

    – LukeM
    Jul 15 '15 at 4:53
















3














Awk has a function called 'tolower':



cat $logfile | awk '
tolower($0) ~ /install/ print "33[32m" $0 "33[39m"; next;
tolower($0) ~ /success/ print "33[32m" $0 "33[39m"; next;
tolower($0) ~ /status/ print "33[33m" $0 "33[39m"; next;
tolower($0) ~ /info/ print "33[33m" $0 "33[39m"; next;
tolower($0) ~ /error/ print "33[31m" $0 "33[39m"; next;
tolower($0) ~ /fail/ print "33[31m" $0 "33[39m"; next;
print;
'


With Bash, you can use shopt -s nocasematch for case insensitive pattern matching. eg.



mystring="AbCdEfG"
shopt -s nocasematch
if [[ $mystring == abcdefg ]] ; then
echo "is a match!!"
fi





share|improve this answer

























  • Almost! That displays only what I am matching, is there a way to match everything else without changing the colours? I want the log to print out normally like when you use cat filename except what my script matches should be in different colours...hope that made sense?

    – dakka
    Jul 15 '15 at 4:46











  • @dakka - I've updated the answer.

    – LukeM
    Jul 15 '15 at 4:53














3












3








3







Awk has a function called 'tolower':



cat $logfile | awk '
tolower($0) ~ /install/ print "33[32m" $0 "33[39m"; next;
tolower($0) ~ /success/ print "33[32m" $0 "33[39m"; next;
tolower($0) ~ /status/ print "33[33m" $0 "33[39m"; next;
tolower($0) ~ /info/ print "33[33m" $0 "33[39m"; next;
tolower($0) ~ /error/ print "33[31m" $0 "33[39m"; next;
tolower($0) ~ /fail/ print "33[31m" $0 "33[39m"; next;
print;
'


With Bash, you can use shopt -s nocasematch for case insensitive pattern matching. eg.



mystring="AbCdEfG"
shopt -s nocasematch
if [[ $mystring == abcdefg ]] ; then
echo "is a match!!"
fi





share|improve this answer















Awk has a function called 'tolower':



cat $logfile | awk '
tolower($0) ~ /install/ print "33[32m" $0 "33[39m"; next;
tolower($0) ~ /success/ print "33[32m" $0 "33[39m"; next;
tolower($0) ~ /status/ print "33[33m" $0 "33[39m"; next;
tolower($0) ~ /info/ print "33[33m" $0 "33[39m"; next;
tolower($0) ~ /error/ print "33[31m" $0 "33[39m"; next;
tolower($0) ~ /fail/ print "33[31m" $0 "33[39m"; next;
print;
'


With Bash, you can use shopt -s nocasematch for case insensitive pattern matching. eg.



mystring="AbCdEfG"
shopt -s nocasematch
if [[ $mystring == abcdefg ]] ; then
echo "is a match!!"
fi






share|improve this answer














share|improve this answer



share|improve this answer








edited Jul 15 '15 at 6:03

























answered Jul 15 '15 at 4:35









LukeMLukeM

3,44932340




3,44932340












  • Almost! That displays only what I am matching, is there a way to match everything else without changing the colours? I want the log to print out normally like when you use cat filename except what my script matches should be in different colours...hope that made sense?

    – dakka
    Jul 15 '15 at 4:46











  • @dakka - I've updated the answer.

    – LukeM
    Jul 15 '15 at 4:53


















  • Almost! That displays only what I am matching, is there a way to match everything else without changing the colours? I want the log to print out normally like when you use cat filename except what my script matches should be in different colours...hope that made sense?

    – dakka
    Jul 15 '15 at 4:46











  • @dakka - I've updated the answer.

    – LukeM
    Jul 15 '15 at 4:53

















Almost! That displays only what I am matching, is there a way to match everything else without changing the colours? I want the log to print out normally like when you use cat filename except what my script matches should be in different colours...hope that made sense?

– dakka
Jul 15 '15 at 4:46





Almost! That displays only what I am matching, is there a way to match everything else without changing the colours? I want the log to print out normally like when you use cat filename except what my script matches should be in different colours...hope that made sense?

– dakka
Jul 15 '15 at 4:46













@dakka - I've updated the answer.

– LukeM
Jul 15 '15 at 4:53






@dakka - I've updated the answer.

– LukeM
Jul 15 '15 at 4:53


















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