command for dns flush in linux

Is there a trick to show detail description of specific command option in linux [closed]

location: linuxexchange.com - date: September 30, 2013
Is there a trick to show linux command's specific option? Such as I want to know some detail about tar's -z option, and I try this: tar --help | grep '-z' but shows nothing. So is it possible just show details about specific command option? Appreciate first if you can help me.

History command in redhat linux [closed]

location: linuxexchange.com - date: January 1, 1970
Guys please I am new to linux . I want to know the current size of the history ( I am not using bash history ) I google it but I found nothing useful thanks in advance

command line to flush php session on linux box

location: linuxexchange.com - date: January 1, 1970
I have a LAMP stack on AWS centOS linux. After updating my site i would like to force all users to re login by clearing all sessions. What is the best way to do this? Is there a way to flush out all sessions currently in PHP?

Need to access Linux Mint command line through Windows

location: linux.com - date: December 12, 2011
Hello. I made a big mistake. I was compiling Blender on my Linux Mint. Because some packages were not on the normal repositories. I played stupid (mainly because I was being lazy). And I add the debian.org's repository. Which was really really stupid. Because now, by default the repositories were of debian.org . So when an error prompted on the update manager I restart with the command line and I did sudo apt-get update (again I was being an idiot because those were unstable packages) And I basically switched it all to debian's repositories (I am the biggest douche on the world). So long story short I can't even login to the command line on my Mint (11 Katya). So I am on my second partition (with Windows). Posting this. What I need now is a command line on Windows so I can solve my problem. Thank you so much! *facepalm*

Unix vs. Linux shell command

location: linuxquestions.com - date: January 9, 2007
I have a shell script written in Unix using command: set -A envvar1 $envvar2 typeset -l variable1 What is the equivalent command for set -A and typeset -l in Linux? Thanks

Linux Command Line Learning Resources

location: ubuntuforums.com - date: January 14, 2012
The information in this thread has been moved to https://help.ubuntu.com/community/CommandLineResources A thread for discussion of the wiki page only can be found here http://ubuntuforums.org/showthread.php?t=2015424 Thread closed. Thought it'd be handy to compile a thread with online resources for new Linux users who want to learn the command line. I'll link it in my signature. MASTER INDEX: Glance over this briefly before posting, to see if we can avoid duplicates. And if we do get duplicates, no big deal. I'll try and keep this list updated with your new posts. Below are the links, and the number at the end is the post in which the resource was suggested. Sites: Linux Command #4 BashGuide BashPitfalls BashFAQ - Greg's Wiki #4 Using The Terminal #2 Command Line How To #2 Advanced Command Line How To #2 LINUX: Rute User’s Tutorial and Exposition by Paul Sheer #4 The Linux Users' Guide by Larry Greenfield #4 An A-Z Index of the Bash command line #4 Gnu Manuals #4 The Li

new to linux, exhaustive command line exercises

location: linuxquestions.com - date: February 8, 2006
Hello all I am trying to switch to linux, though it seems not so easy. at least as comfortable as with windows for day to day tasks regarding documents, pictures, sounds, videos etc. first i want to get comfortable with commands. i see that general short guidelines found in many sections for configuration with command lines is not good enough for a newcomer. I am looking for exhaustive excercises for checking various configurations to get to know the devices, command prompt better, without risking my system too much. (I installed Ubuntu on AMD Athelon 850MHz) for example, just few lines over 'mount' command are not enough.. any clues?

Linux Command Line Learning Resources

location: ubuntuforums.com - date: July 3, 2012
Please use this thread for discussion regarding https://help.ubuntu.com/community/CommandLineResources The old thread detailing this can be found at http://ubuntuforums.org/showthread.php?t=1909108 Thank you.

How access the command line Terminal in Ubuntu linux?

location: linuxquestions.com - date: April 10, 2008
How access the command line Terminal in Ubuntu 7.10 linux? Thank you for your time! Jason

flush my swap/ram? command?

location: linuxquestions.com - date: April 28, 2005
anyone know of a terminal/run command to clear out my RAM and my swap space? the other OS had a prog called freemem which would clean it out, and older machines would run a bit faster after it. I'd love to flush it out on this work machine I use (pent 2, mepis 3.3) ideas?