nixCraft » linux system 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 Preload: How To Speed Up Your Linux Application Loading Timehttp://www.cyberciti.biz/tips/speed-up-your-linux-system.html http://www.cyberciti.biz/tips/speed-up-your-linux-system.html#comments Thu, 28 Feb 2008 17:05:06 +0000 Vivek Gite http://www.cyberciti.biz/tips/speed-up-your-linux-system.html http://www.cyberciti.biz/tips/speed-up-your-linux-system.html/feed 0 Linux Increase Process Identifiers Limit with /proc/sys/kernel/pid_maxhttp://www.cyberciti.biz/tips/howto-linux-increase-pid-limits.html http://www.cyberciti.biz/tips/howto-linux-increase-pid-limits.html#comments Sat, 03 Nov 2007 02:13:09 +0000 Vivek Gite http://www.cyberciti.biz/tips/howto-linux-increase-pid-limits.html http://www.cyberciti.biz/tips/howto-linux-increase-pid-limits.html/feed 0 nixCraft FAQ Roundup May 06, 2007http://www.cyberciti.biz/tips/nixcraft-faq-roundup-17.html http://www.cyberciti.biz/tips/nixcraft-faq-roundup-17.html#comments Sun, 06 May 2007 20:10:17 +0000 Vivek Gite http://www.cyberciti.biz/tips/nixcraft-faq-roundup-17.html http://www.cyberciti.biz/tips/nixcraft-faq-roundup-17.html/feed 0 Download advanced Linux programming book PDF versionhttp://www.cyberciti.biz/tips/advanced-linux-programming-book-howto-pdf.html http://www.cyberciti.biz/tips/advanced-linux-programming-book-howto-pdf.html#comments Tue, 20 Feb 2007 06:01:27 +0000 Vivek Gite http://www.cyberciti.biz/tips/advanced-linux-programming-book-howto-pdf.html http://www.cyberciti.biz/tips/advanced-linux-programming-book-howto-pdf.html/feed 10 What is Umask and How To Setup Default umask Under Linux?http://www.cyberciti.biz/tips/understanding-linux-unix-umask-value-usage.html http://www.cyberciti.biz/tips/understanding-linux-unix-umask-value-usage.html#comments Wed, 31 Jan 2007 20:59:56 +0000 Vivek Gite http://www.cyberciti.biz/tips/understanding-linux-unix-umask-value-usage.html Anil ask a question (via email):
What is umask and how is it determined on a Linux system?
]]> http://www.cyberciti.biz/tips/understanding-linux-unix-umask-value-usage.html/feed 59 Download One page Linux reference (Linux Anatomy)http://www.cyberciti.biz/tips/download-one-page-linux-reference-linux-anatomy.html http://www.cyberciti.biz/tips/download-one-page-linux-reference-linux-anatomy.html#comments Sun, 05 Nov 2006 10:39:25 +0000 Vivek Gite http://www.cyberciti.biz/tips/download-one-page-linux-reference-linux-anatomy.html http://www.cyberciti.biz/tips/download-one-page-linux-reference-linux-anatomy.html/feed 0 Allow A Normal User To Run Commands As root Under Linux / UNIX Operating Systemshttp://www.cyberciti.biz/tips/allow-a-normal-user-to-run-commands-as-root.html http://www.cyberciti.biz/tips/allow-a-normal-user-to-run-commands-as-root.html#comments Sat, 13 May 2006 03:33:33 +0000 Vivek Gite http://www.cyberciti.biz/tips/allow-a-normal-user-to-run-commands-as-root.html From my mail bag:
I would like to run few commands such as stop or start web server as a root user. How do I allow a normal user to run these commands as root?
]]> http://www.cyberciti.biz/tips/allow-a-normal-user-to-run-commands-as-root.html/feed 13 Re-read The Partition Table Without Rebooting Linux Systemhttp://www.cyberciti.biz/tips/re-read-the-partition-table-without-rebooting-linux-system.html http://www.cyberciti.biz/tips/re-read-the-partition-table-without-rebooting-linux-system.html#comments Mon, 08 May 2006 13:35:53 +0000 Vivek Gite http://www.cyberciti.biz/tips/re-read-the-partition-table-without-rebooting-linux-system.html If you are using hot swappable hard disk and created new partition using fdisk then you need to reboot Linux based system to get partition recognized. Without reboot you will NOT able to create filesystem on your newly created or modified partitions with the mke2fs command. However with partprobe command you should able to create a new file system without rebooting the box. It is a program that informs the operating system kernel of partition table changes, by requesting that the operating system re-read the partition table.]]> http://www.cyberciti.biz/tips/re-read-the-partition-table-without-rebooting-linux-system.html/feed 20 How do I find out if my Linux server CPU can run a 64 bit kernel version (apps) or not?http://www.cyberciti.biz/tips/how-do-i-find-out-if-my-server-cpu-can-run-a-64-bit-kernel-version-apps-or-not.html http://www.cyberciti.biz/tips/how-do-i-find-out-if-my-server-cpu-can-run-a-64-bit-kernel-version-apps-or-not.html#comments Fri, 07 Apr 2006 17:06:00 +0000 LinuxTitli http://www.cyberciti.biz/tips/how-do-i-find-out-if-my-server-cpu-can-run-a-64-bit-kernel-version-apps-or-not.html http://www.cyberciti.biz/tips/how-do-i-find-out-if-my-server-cpu-can-run-a-64-bit-kernel-version-apps-or-not.html/feed 16 Read UNIX / Linux System IP Address In a Shell Scripthttp://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 How do I Use Multiple Screens on One Terminal over ssh session?http://www.cyberciti.biz/tips/linux-screen-command-howto.html http://www.cyberciti.biz/tips/linux-screen-command-howto.html#comments Wed, 07 Dec 2005 09:32:00 +0000 Vivek Gite http://www.cyberciti.biz/tips/how-do-i-use-multiple-screens-on-one-terminal-over-ssh-session-part-1.html Most of the time GUI is not available on remote Linux system, you login over ssh and start to work, if you need to run two or three task at a time, you login over ssh two or three times. However, with screen windows manager utility you can run multiple terminals at the same time from single console login over ssh session (UNIX guru uses the term called multiplexing for this concept). Any seasoned Linux admin should be aware of this nifty tool :)]]> http://www.cyberciti.biz/tips/linux-screen-command-howto.html/feed 16 Linux Changing Run Levelshttp://www.cyberciti.biz/tips/linux-changing-run-levels.html http://www.cyberciti.biz/tips/linux-changing-run-levels.html#comments Sun, 16 Oct 2005 17:44:00 +0000 nixcraft http://www.cyberciti.biz/tips/linux-changing-run-levels.html A question from my email bag:
How do changing run levels affect us or our users?
]]> http://www.cyberciti.biz/tips/linux-changing-run-levels.html/feed 4 Howto Reboot or halt Linux system in emergencyhttp://www.cyberciti.biz/tips/reboot-or-halt-linux-system-in-emergency.html http://www.cyberciti.biz/tips/reboot-or-halt-linux-system-in-emergency.html#comments Thu, 25 Aug 2005 23:53:00 +0000 LinuxTitli http://www.cyberciti.biz/tips/reboot-or-halt-linux-system-in-emergency.html http://www.cyberciti.biz/tips/reboot-or-halt-linux-system-in-emergency.html/feed 5