To add spaces in awk.
Add the below ” ” to your command, example is added below.
date | awk {'print $2," " $3'}
awk
Top 10 largest files and directories
To get the top 10 largest files and directories on linux..
Run the below.
du -a /var | sort -n -r | head -n 10
Also to find the largest files
find /logs/ -type f -size +1000000k -exec ls -lh {} \; | awk '{ print $9 ": " $5 }'
List directories that contain numbers only
Needed to list directories which only contained numbers.
Just run the below.
ls -l | egrep "^d" | awk {'print $9'} | sort | sort -nr | egrep "[0-9]{1,}" -o
Kill all java threads
Quick way to kill all java threads quickly if you cant get them to stop using conventional means.
sudo kill -9 `ps -ef|grep java|grep -v grep|awk {'print $2'}`
Use AWK for sum and average
Found a handy snippet for getting the sum and average of some data in a text file using AWK.
Just run the below query on your data
awk '{ s += $1 } END { print "sum: ", s, " average: ", s/NR, " samples: ", NR }'
Awk and more awk..
The logs they never end…More logs and more logs and more problems with more logs…Needed to look at some apache access logs today. Handy to be able to use awk to filter the data to make it a bit more visible to whats going on. Using the below we can count the number of occurances for the specified part of the line. In the below example its getting the number of occurances for the IP’s in the access log but you can amend this to see the request headers or status codes depending on their location on the line using awk.
Example
Access Log
132.17.14.252 - - [09/Sep/2011:04:16:41 +0100] "GET /something.html HTTP/1.1" 200 7031 46785 "-" "-" blah.something.net
Awk
zcat apache.access.log.1.gz | awk {'print $1'} | sort | uniq -c | sort -nr | head -10
Result
485487 175.12.15.200
557 216.151.121.50
506 80.141.40.132
486 218.156.138.239
475 79.142.40.105
452 79.142.40.115
450 79.142.41.118
444 218.156.138.238
441 87.134.71.123
436 218.156.138.211
thebashline 