My grep commands

When I search for things in my codebase I find that using the terminal and grep is usually the best option. Here is what I usually run:

# find meng in all files under a specific directory

# switches i - case insensitive, r - recurrsive, H - show file and path, n - line number
grep -irHn 'meng' current/

# you can count using c
grep -irc 'meng' current/

# you can use regex
grep -ire ^d current/
# search files in current direct for any line that starts with d or D
# make sure e is an the end for example I want line numbers
grep -irne ^d current/

# to skip binary files use I (uppercase i)
grep -iIHrn 'meng' current/

 

Learn how to use top command in linux

I find myself using this often while debugging errors or trying to figure why a server is slow or unresponsive.

# show all processes
top

# to quit top type q
# to sort press Shift+O
# K for cpu % or use Shift+P

# show all processes from a specific user
top -u username

# example for me using deployer as the user to run web processes
top -u deployer

# highlight working process
z

# show path for process
c

# kill pid
k

# get help
h

 

Vagrant Boxes / VMWare Fusion / CentOS 7

Use one found here: http://www.vagrantbox.es you can use one of those to build upon or you can create one.

These steps are if you want to to create a fresh box.
Grab the latest CentOS image here:
http://www.centos.org/download/

I use the minimal image http://ftp.usf.edu/pub/centos/7.0.1406/isos/x86_64/CentOS-7.0-1406-x86_64-Minimal.iso

First you need to create a VM using Fusion.

  1. Select “Install from disc or image” >> Continue
  2. “Use another disc or disc image” >> Find your iso >> Continue
  3. Uncheck “Use Easy Install” make sure “Make your home folder accessible to the virtual machine is unchecked. >> Continue
  4. Click “Customize Settings” >> Rename your vm and place it somewhere safe.

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