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To modify ip-tables directly in ubuntu First save off your current config: $ sudo -s $ iptables-save > /root/working.iptables.rules $ iptables-save > /root/working.iptables.rules.to.modify At this point you can modify the file. Once your are satisfied restore it # iptables-restore < /root/working.iptables.rules.to.modify
Configure postfix with Gmail via Webmin This assumes the user has webmin installed and understands how to log in and use it. (Usually bring it up in a browser at https://localhost:10000 ) Make sure that postfix is installed. In Webmin this is done by going to “System”, “Software Packages” then clicking on “Package from APT” and . . . → Read More: Configure postfix with Gmail via Webmin Scripts to manage Active Directory Users Appending a Multi-Valued Attribute Appending a Phone Number Adding a Route to the Dial-In Properties of a User Account Adding a User to Two Security Groups Appending Address Page Information for a User Account Appending a Home Phone Number to a User Account Assigning a Published Certificate to a . . . → Read More: useful active directory scripts Useful Linux Commands (Red Hat) (http://www.cse.buffalo.edu/~eisner/DLW) Revised 3/1/2000 Getting information man commandname display the manual page for a particular command named commandname man -S sectionnumber commandname display the manual page under a specific section numbered sectionnumber for the command named commandname. Sometimes the same command will exist in more than one section. man alone will . . . → Read More: Red Hat Linux cheat sheet commands examples RHEL Add Public SSH Key to Remote Server in a Single Command From HowToGeek If you want to setup SSH keys to allow logging in without a password, you can do so with a single command. The first thing you’ll need to do is make sure you’ve run the keygen command to generate the keys:
. . . → Read More: Add Public SSH Key to Remote Server in a Single Command How do I use shutdown command? The shutdown command can be used to turn off or reboot a computer. Type the command as follows to shutdown server / computer immediately:
OR
How do I shutdown compute at specific time? To shutdown computer at 6:45pm, enter:
At 6:30pm message will go out to . . . → Read More: shutdown ubuntu linux Having trouble getting x11vnc working? Here’s the error:
You must run this command to figure out the right path for gdm:
output (text in red is the info you need): root 1791 0.0 0.1 3004 748 pts/5 R+ 16:29 0:00 grep auth root 6134 0.0 3.1 37500 12148 tty7 Ss+ 2009 178:10 /usr/bin/X . . . → Read More: x11vnc was unable to open the X DISPLAY How to find files, programs, etc using freebsd The locate command is good for finding files and directories. Enter something similar to:
If that doesn’t work, perhaps try the whereis or find commands:
For variations on these commands, you can type:
(from http://www.us-webmasters.com/FreeBSD/Tips-Hints-Tricks/How-to-Find-Files-and-Directories-on-FreeBSD/) To find the largest ten files on the disk: . . . → Read More: freebsd find A great place to find vmware virtual machines for freebsd, ubuntu, cent os, red hat linux (RHEL), Linux Mint, etc is over at bagside’s virtual appliance repository here’s what they offer: Virtual Appliance Repository.
This site is dedicated to virtual appliances that we build for you to use FREE of charge (except for Windows . . . → Read More: vmware unix |
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