Thursday, May 28, 2015

How to test the network bandwidth between two machines on Linux

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1. Install iperf on Ubuntu: sudo apt-get install iperf on Centos: sudo yum install -y iperf 2.On one machine (haha.google.com) iper...
Monday, April 27, 2015

How to figure out segmentation fault (segfault)

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Well, sometime we do meet segfaults on Linux/Unix systems. We definitely do not like them, as they are hard to debug. (1) What is segfault...
Tuesday, April 21, 2015

How to monitor network traffics on Ubuntu

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(1) Wireshark: shows network packages sudo apt-get install wireshark sudo wireshark (2) tcptrack: shows traffic per IP and port numb...
Monday, February 9, 2015

How to use Junos Pulse VPN client on Ubuntu 12.04

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Junos Pulse is a VPN client made by Juniper. It is widely used in companies. However, as far as I know, there is no released versions for Ub...
6 comments:
Tuesday, October 7, 2014

How to add default network search domain on Ubuntu 12.04

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Why? you can use ping p1.google.com if you added google.com to the default search domain, you only need to do ping p1. This is especially...
Thursday, April 24, 2014

VIM useful commands

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:sort to sort all the lines in the current file :sort u to sort and then unique all the lines in the current file :%!sort -R to shuff...
Friday, March 7, 2014

How to combine combine images/pdfs on Ubuntu?

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1. Ubuntu 12.04 pdf printer sudo apt-get install cups-pdf 2. Combine images into a pdf file imagemagick is a command line toolkit to mod...