Currently viewing the tag: "linux"

real time traffic analysis in Linux

by shing fai it consult on May 27, 2011 · No Comments

tools: ibmonitor for real-time traffic consumed: http://ibmonitor.sourceforge.net/ jnettop for real-time traffic visual analysis : http://download.fedora.redhat.com/pub/epel/4/i386/repoview/jnettop.html tcpdump for real-time packet capture iptables for block unwanted traffic tcpdump howto: 1. dump traffic without port 22 and write it to file log.cap tcpdump -i eth0 not port 22 -n -w log.cap 2. tcpdump for dummies: http://www.alexonlinux.com/tcpdump-for-dummies iptables in [...]

useful commands

by shing fai it consult on March 11, 2011 · No Comments

To perform groupinstall: # yum groupinstall ‘KDE’ To get the available and installed groups: # yum grouplist Multi -boot for Windows and Linux 1.In Linux, dd if=/dev/hda2 of=/linux.bin bs=512 count=1 2. copy the linux.bin file to Windows c:\ 3. In Windows, add following in the boot.ini c:\linux.bin=”Linux”

compare 2 files under Linux

by shing fai it consult on December 8, 2010 · No Comments

Method 1 : use command comm to compare two sorted files line by line. Usage: comm [OPTION]… FILE1 FILE2  With no options, produce three-column output. Column one contains lines unique to FILE1, column two contains lines unique to FILE2, and column three contains lines common to both files. -1 suppress lines unique to FILE1 -2 [...]