Linux process states for each program. you can find it out by running “man ps” and look for PROCESS STATE CODES
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PROCESS STATE CODES Here are the different values that the s, stat and state output specifiers (header "STAT" or "S") will display to describe the state of a process: D uninterruptible sleep (usually IO) R running or runnable (on run queue) S interruptible sleep (waiting for an event to complete) T stopped, either by a job control signal or because it is being traced W paging (not valid since the 2.6.xx kernel) X dead (should never be seen) Z defunct ("zombie") process, terminated but not reaped by its parent For BSD formats and when the stat keyword is used, additional characters may be displayed: < high-priority (not nice to other users) N low-priority (nice to other users) L has pages locked into memory (for real-time and custom IO) s is a session leader l is multi-threaded (using CLONE_THREAD, like NPTL pthreads do) + is in the foreground process group |
Use autossh to reconnect ssh tunnel disconnects automatically, lets say you maintain a ssh tunnel to visit few websites blocked on the firewall using foxyproxy from restricted network.
1. setup an ssh key login from the restricted machine to the home machine.
2. configure foxy proxy and setup a wild card expression. ex: http://*linkedin.com/* to [...]
Set up ssh client configuration file for auto selecting username and port
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mkdir -pv ~/.ssh/connections cat ~/.ssh/config #connect to default port with different user than what you have logged into shell Host host1 host2 host3 User mohanb #use a custom port Host nixgate1.homeip.net User mohan port 443 #set control path to establish second connection immediately Host * Compression yes CompressionLevel 7 Cipher blowfish ControlMaster auto ControlPath ~/.ssh/connections/%r_%h_%p |
Use ethtool to change interface statistics.
Installation
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root@gateway:~# apt-get install ethtool |
Syntax
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root@gateway:~# ethtool -h Usage: ethtool DEVNAME Display standard information about device ethtool [options] devicename ethtool devicename ethtool eth0 |
Mirror a website recursively:
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wget --mirror --no-parent --no-host-directories -erobots=off --cut-dirs=4 http://variyas.com/ |
Download files recursively from a http mirror:
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#Download files recursively: wget --mirror --no-parent --no-host-directories -erobots=off --cut-dirs=4 http://variyas.com/files/ #Delete the html files as part of clean up find . -iname 'index.html*' -print -exec rm -fv {} \; |
Note: we are ignoring the robots.txt file or else the download will fail
Configuring SendMail To Act As A SmartHost
This Tutorial explains how to configure a sendmail server to forward all mails generated from localhost to an another SMTP server for sending mails to remote recipients. Also it explains how to rewrite the from address of [email protected] to the [email protected]
Example Scenario:
You have a production server [...]
Creating Persistent STATIC ROUTES IN SMOOTHWALL Firewall
First login to the system and move to /etc/rc.d folder create a file named: rc.staticroute or any name of your convineince
open the created file
vi /etc/rc.d/staticroute
then go into the append mode and create these entries
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#------------- Starting line------------------# #Author: Mohan #Purpose: static routes created for reason #!/bin/sh route add -net 192.168.10.0 netmask 255.255.255.0 gw 192.168.1.1 route add -host 192.168.8.10 netmask 255.255.255.0 gw 192.168.2.1 #-------------- Ending Line--------------------# |
Add as many routes as you want in that [...]
Access Windows PC Remotely from linux using rdesktop:-
————————————————————–
NOTE: This process applies to Redhat/CentOS/SuSE distributions
First check whether rdesktop package is installed
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linuxidiot@hostbox:# rpm -qa | grep rdesktop rdesktop-1.5.0-79 |
It should show something like rdesktop-1.x.x-xx version if installed else download the rpm from any of the available download locations like http://rpm.pbone.net or http://rpmfind.net download the rdesktop package for your distribution.
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linuxidiot@hostbox:# rpm -ivh rdesktop-1.5.0-79.rpm |
if [...]
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