Kai Mai's Blog - Take Back the Web - Nodes for utility

How to Check Disk Space and Directory Space in Linux

Thu, 26 Mar 2009 10:21:50 -0700

Surprisingly, I often run into the problem of running out of disk space in Linux.

Here are some simple commands to check what consumes the most space:

"df -k" shows the percentage of disk consumption for each partition
"du --max-depth 1 -h /" shows how much space each directory under "/" consumes in megabytes
"du -sm * | sort -n" does the same thing as the previous command

stackoverflow has a good discussion as well.

Tags: linux utility disk

Get Rid of Duplicated Entries/Processes in htop Display

Wed, 18 Feb 2009 23:28:50 -0800

htop is a "top" on steroid Linux utility for interactively viewing processes.

What puzzled me was that some of the process counts seem to be doubled.

I know for a fact that I run two Thin servers(BTW, Thin seems to use less memory than Mongrel). But htop shows 4 processes


3895 root      20   0  187M 95484  3732 S  0.0  9.1  0:55.42 thin server (/tmp/site.1.sock)                                                                               
3899 root      20   0  187M 95484  3732 S  0.0  9.1  0:03.26 thin server (/tmp/site.1.sock)

Tags: linux utility htop

Linux/Unix Console Tricks: Multiple Screens within One Console, Tailling Multiple Files with multitail

Tue, 23 Sep 2008 23:46:50 -0700

I find the following Linux/Unix console tricks really handy:

Multiple screens within one console

You need to SSH into a Linux server and work with multiple screens(eg: tailing a log, vi a source file, etc). Instead of opening multiple SSH sessions(multiple putty in Windows, or terminal windows in Mac), you can open multiple screens within one console window by using "screen" command.


yum install screen
screen

Here are the shortcuts:

ctrl+a + ctrl+c to add a new screens
ctrl+a + ctrl+a to switch between screens
ctrl+a + " to see a list of screens
ctrl+a + (a number) to switch to the "numbered" screen

Tags: linux console utility screen trick logging shell command