http://www.cyberciti.biz/tips This is a Linux sys admin journal by Vivek about sys admin work, Linux tips & tricks, hacks, news and more. Fri, 03 Feb 2012 22:45:35 +0000 en hourly 1 http://wordpress.org/?v=3.3.1 http://www.cyberciti.biz/tips/spice-up-your-unix-linux-shell-scripts.html http://www.cyberciti.biz/tips/spice-up-your-unix-linux-shell-scripts.html#comments Mon, 19 Apr 2010 20:47:43 +0000 Vivek Gite http://www.cyberciti.biz/tips/?p=6787 There are some misconceptions that shell scripts are only for a CLI environment. You can easily use various tools to write GUI and/or network (socket) scripts under KDE or Gnome desktops. Shell scripts can make use of some of the GUI widget (menus, warning boxs, progress bars etc). You can always control the final output, cursor position on screen, various output effects, and so on. With the following tools you can build powerful, interactive, user friendly UNIX / Linux bash shell scripts.]]> http://www.cyberciti.biz/tips/spice-up-your-unix-linux-shell-scripts.html/feed 83 http://www.cyberciti.biz/tips/faq-updates-nov132010.html http://www.cyberciti.biz/tips/faq-updates-nov132010.html#comments Fri, 13 Nov 2009 12:58:17 +0000 Vivek Gite http://www.cyberciti.biz/tips/?p=7436

Linux Network IP Accounting - I need to know how much data are transmitted on my ppp0 network or eth0 Internet links? How do I set IP accounting by address such as 123.1.2.3 and 123.1.2.4? How do I set IP accounting per Apache virtual domain? How do I set accounting by service port (http, smtp) and protocol (tcp, udp, icmp)? How do I record how much traffic each of the clients computer is using?

Linux / UNIX: DNS Lookup Command - How do I perform dns lookup under Linux or UNIX or OS X operating systems without using 3rd party web sites for troubleshooting DNS usage?

Linux: Find Out Which Process Is Listening Upon a Port - How do I find out running processes were associated with each open port? How do I find out what process has open tcp port 111 or udp port 7000 under Linux?

Google Apps Domain Create SPF Records For BIND or Djbdns - I work for a small business and outsourced our email hosting to Google. However, I noticed that spammers are using our From: First Last to send their spam messages. All bounced messages come to our catch only account. How do I stop this? How do I validate our domain using SPF? How do I configure a SPF for Google Apps domain using BIND 9 or djbdns? Mac Os X: Mount NFS Share / Set an NFS Client - How do I access my enterprise NAS server by mounting NFS filesystem onto my Mac OS X based system using GUI and command line based tools?

Explains: echo Command (echo $”string”) Double-quoted String Preceded By a Dollar Sign - I noticed that many shell scripts in /etc/init.d/ directory use the following syntax - echo $"Usage $prog start|stop|reload|restart". Why a double-quoted string preceded by a dollar sign ($”string”) using the echo command under Linux / UNIX bash scripts?

Get intimated about our new howtos / faqs as soon as it is released via RSS feed.

]]> http://www.cyberciti.biz/tips/faq-updates-nov132010.html/feed 0 http://www.cyberciti.biz/tips/squirrel-portable-shell-and-scripting-language.html http://www.cyberciti.biz/tips/squirrel-portable-shell-and-scripting-language.html#comments Mon, 19 Jan 2009 06:42:27 +0000 Vivek Gite http://www.cyberciti.biz/tips/?p=4559 This may come handy while writing cross-platform scripts.

If you don't want to commit to the idiosyncrasies of a specific shell running on a particular platform, try the Squirrel Shell. The Squirrel Shell provides an advanced, object-oriented scripting language that works equally well on UNIX, Linux, Mac OS X, and Windows systems. Write a script once, and run it anywhere.

Squirrel is a high level imperative/OO programming language, designed to be a light-weight scripting language that fits in the size, memory bandwidth, and real-time requirements of applications like video games.

=> Speaking UNIX: The Squirrel portable shell and scripting language]]> http://www.cyberciti.biz/tips/squirrel-portable-shell-and-scripting-language.html/feed 0 http://www.cyberciti.biz/tips/cvlc-console-vlc-player.html http://www.cyberciti.biz/tips/cvlc-console-vlc-player.html#comments Wed, 28 May 2008 10:28:26 +0000 Vivek Gite http://www.cyberciti.biz/tips/?p=4162 http://www.cyberciti.biz/tips/cvlc-console-vlc-player.html/feed 1 http://www.cyberciti.biz/tips/troubleshooting-debian-ubuntu-package-upgrades-removals.html http://www.cyberciti.biz/tips/troubleshooting-debian-ubuntu-package-upgrades-removals.html#comments Sun, 11 May 2008 19:47:29 +0000 Vivek Gite http://www.cyberciti.biz/tips/?p=2280 http://www.cyberciti.biz/tips/troubleshooting-debian-ubuntu-package-upgrades-removals.html/feed 21 http://www.cyberciti.biz/tips/linux-unix-shell-batch-copy.html http://www.cyberciti.biz/tips/linux-unix-shell-batch-copy.html#comments Thu, 03 Jan 2008 14:49:41 +0000 Vivek Gite http://www.cyberciti.biz/tips/linux-unix-shell-batch-copy.html If you would like to copy a set of files for all existing users, use the following scripting trick. It will save lots of manual work.]]> http://www.cyberciti.biz/tips/linux-unix-shell-batch-copy.html/feed 9 http://www.cyberciti.biz/tips/running-all-unix-linux-scripts-in-directory.html http://www.cyberciti.biz/tips/running-all-unix-linux-scripts-in-directory.html#comments Fri, 12 Oct 2007 07:35:17 +0000 Vivek Gite http://www.cyberciti.biz/tips/running-all-unix-linux-scripts-in-directory.html http://www.cyberciti.biz/tips/running-all-unix-linux-scripts-in-directory.html/feed 2 http://www.cyberciti.biz/tips/linux-unix-python-tutorial.html http://www.cyberciti.biz/tips/linux-unix-python-tutorial.html#comments Thu, 06 Sep 2007 13:14:17 +0000 Vivek Gite http://www.cyberciti.biz/tips/linux-unix-python-tutorial.html http://www.cyberciti.biz/tips/linux-unix-python-tutorial.html/feed 0 http://www.cyberciti.biz/tips/linux-unix-get-yesterdays-tomorrows-date.html http://www.cyberciti.biz/tips/linux-unix-get-yesterdays-tomorrows-date.html#comments Sun, 17 Jun 2007 18:28:04 +0000 Vivek Gite http://www.cyberciti.biz/tips/getting-yesterdays-or-tomorrows-day-with-shell-date-command.html When invoked without arguments, the date command displays the current date and time. Depending on the options specified, date will set the date and time or print it in a user defined way. I've seen many sysadmin writing perl scripts for calculating relative date such as yesterdays or tomorrows day. You can use GNU date command, which is designed to handle relative date calculation such as:

• 1 Year
• 2 Days
• 2 Days ago
• 5 Years

]]> http://www.cyberciti.biz/tips/linux-unix-get-yesterdays-tomorrows-date.html/feed 42 http://www.cyberciti.biz/tips/read-unixlinux-system-ip-address-in-a-shell-script.html http://www.cyberciti.biz/tips/read-unixlinux-system-ip-address-in-a-shell-script.html#comments Mon, 16 Jan 2006 22:27:00 +0000 Vivek Gite http://www.cyberciti.biz/tips/read-unixlinux-system-ip-address-in-a-shell-script.html

Reading an IP address in shell script required many time. However, different Linux distribution stores IP address in different files. If you are looking to run script under different UNIX like OSes such as Solaris or FreeBSD then you need to use the ifconfig command. The ifconfig command is not just used to configure a network interface, but it can be use to obtained information such as network IP, netmask and much more. ]]> http://www.cyberciti.biz/tips/read-unixlinux-system-ip-address-in-a-shell-script.html/feed 25