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sometimes, grep alone is enough to do the task

2 votos Vota!!

April 14th, 2009 mysurface

One thing that makes UNIXes command line so powerful is because of pipelines. Pipelines is a set of processes chained by their standard streams, so that the output of each process (stdout) feeds directly as input (stdin) of the next one. Simple words, pipelines pass the outcomes of a particular command as input to another [...]

Posted in Text Manipulation, grep | Hits: 143602 | 1 Comment »

Syslog: Sending log from remote servers to syslog daemon

2 votos Vota!!

July 23rd, 2008 mysurface

syslog is a standard for logging service in Linux, it usually run as daemon like syslogd or rsyslogd. Syslog daemon will be forward and store logs in /var/log directory, you may configure it to store at separate location if you want. (we will look into it later). And there is a major file that store [...]

Posted in Admin, logger, nc, rsyslogd, syslogd, tail | Hits: 89527 | No Comments »

Top Ten Processes Watcher

1 votos Vota!!

July 13th, 2008 mysurface

top command provides a dynamic real-time view of a running system. It can display system summary information as well as a list of tasks currently being managed by the Linux kernel. But if you want get something more specific, you must play some tricks on it. For example, I want a clean view of top [...]

Posted in head, tail, top, watch | Hits: 75593 | No Comments »

vim taglist plugin for developers

3 votos Vota!!

June 1st, 2008 mysurface

Taglist plugin provides vim to support source code browsing capabilities at sidebar. When you enable taglist, sidebar windows will be listing functions, classes, structures, enumerations, macro definitions and other parts of a source code file as shortcut. Shortcut will jump you to the particular portion of codes within a single page.

The taglist may [...]

Posted in vi, vim | Hits: 35945 | 3 Comments »

Discover user guides and manuals within your linux system

0 votos Vota!!

May 9th, 2008 mysurface

Do you realized that we can obtain a lots of user manuals and guideline documents from our system? There is a folder /usr/share/doc, you may find some useful docs already preinstalled by your distro. Those docs are in pdf or html format. I manage to find user manuals for valgrind, ipython, systemtap, boost etc.
I believes [...]

Posted in Common, echo, find | Hits: 32849 | 2 Comments »

vim with ctags for multi-level directory hierarchy

0 votos Vota!!

April 24th, 2008 mysurface

I have wrote a post regarding vim with ctags, introduces how ctags allows you to travel across source codes, searching for function, objects, variables definition. To jump from function call to function definition, I usually do ctrl+] in vim. It should works fine as it should have already configured by default from most of the [...]

Posted in Developer, Text Manipulation, ctags, vi, vim | Hits: 27990 | 5 Comments »

rpm and yum rescue tips on Fedora

1 votos Vota!!

April 22nd, 2008 mysurface

You have to be careful when you run yum update and yum install, DON’T force kill it, kill -9 or pkill -9. Those action are consider very dangerous, may lead you to losing certain files. Seriously, I hate yum, when I really wanna cancel the process in the middle, by hitting ctrl+c doesn’t really work! [...]

Posted in Admin, awk, rpm, which, yum | Hits: 29778 | No Comments »

Obtain some system statistics from vmstat

1 votos Vota!!

December 8th, 2007 mysurface

vmstat know as virtual memory statistics reporter, but it gives more information the just only virtual memory.
Besides memory, it covers overall CPU usage, IO, Swap, Proc, System interupts and context switching. vmstat is pretty easy to use, ignores all other options, the normal usage will be looks like this:
vmstat [delay] [counts]
Let say, you want to [...]

Posted in Admin, date, tail, vmstat | Hits: 49198 | 4 Comments »

How to redirect output to a file as well as display it out

4 votos Vota!!

December 6th, 2007 mysurface

To redirect standard output to a file is easy, you just need to use the redirection symbol, for example:
echo “hello world” > test.txt
But what if I want to display it out as well as store into a file?
Answer: tee
echo “hello world” | tee test.txt
Okay it seems very easy, how about append?
Related PostsDisplay & log command [...]

Posted in Text Manipulation, pipeline, python, tee | Hits: 67782 | 12 Comments »

write a online manga downloader using bash

0 votos Vota!!

November 29th, 2007 mysurface

There are plenty of site that allows you to read manga online, but you have to tolerate for the slow access and ton’s of heavy loaded ads. You can’t download the manga directly using batch download provided by wget or any download manager. but if you know how to do bash script, you could somehow [...]

Posted in Bash, Text Manipulation, seq, wget | Hits: 36459 | 4 Comments »

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