#!/bin/bash ps -A -o pid,rss,command | grep nginx | grep -v grep | awk ‘{total+=$2}END{printf(“nginx=%dMb\n”, total/1024)}’ ps -A -o pid,rss,command | grep php-fpm | grep -v grep | awk ‘{total+=$2}END{printf(“php-fpm=%dMb\n”, total/1024)}’ ps -A -o pid,rss,command | grep mysqld | grep -v grep | awk ‘{total+=$2}END{printf(“mysql=%dMb\n”, total/1024)}’ ps -A -o pid,rss,command | grep transmission-da | grep […]

Bash Shell Shortcuts Special Shell Variables

Common environment variables

PATH – Sets the search path for any executable command. Similar to the PATH variable in MSDOS.

HOME – Home directory of the user.

MAIL – Contains the path to the location where mail addressed to the user is stored.

IFS – Contains a string […]

So, let’s consider the following log file:

www.three.com 10.15.101.11 1353280801 TEST 345 www.one.com 10.14.101.11 1353280801 TEST 343 www.three.com 1.10.11.71 1353280801 TEST 323 www.one.com 10.15.11.61 1353280801 TEST 365 www.two.com 10.10.11.51 1353290801 TEST 55 www.two.com 10.20.13.11 1353290801 REST 435 www.one.com 10.20.14.41 1353290801 REST 65 www.two.com 10.10.11.14 1353290801 REST 345 www.three.com 10.10.11.31 1354280801 REST 34 www.one.com 10.10.13.144 1354280801 […]

grep, cat, zgrep and zcat

More on log parsing, I’m taking notes on how to read log files and get the information that I need. On Linux environment, these tools are perfect: grep, cat, zgrep and zcat.

Extracting patterns with grep

We can extract information from a text file using grep. Example, we can extract […]