This page is intended to help keep track of the linux commands and ERSP commands frequently used while working on [wiki:robotmobility]

= Packages = 

`apt-get -f install` - Repairs broken dependencies

`dpkg --list |grep something` - Search for something in installed packages

= ERSP =
== Navigation Tool ==
`run_client_gui` - Opens the navigation tool. This tool includes the ''vSlam'' and ''teleoperation'' applets.

`run_slam_explore` - Runs the vSlam server. To use the vSlam applet, first run ''run_slam_explore'', then run ''run_client_gui'' in a seperate terminal. If done properly, the ''Camera Local'' field in navtool will be blank.

`run_teleop` - Runs the teloperations server.

== Hardware tests ==
''In general, if the first three of these tests work, run_client_gui should work as well.''

`test_battery`

`test_range_sensor`

`test_camera`

= Jobs and Processes =
''In general, ctrl+z suspends a job, and ctrl+c kills one''

`lsof` - Lists open files

== Suspended jobs ==

`bg` - Continue running job in background

`fg` - Resume job in foreground

`jobs` - List suspended jobs and their numbers

`kill %#` - Kill job #

`ps -ef|grep something` - List processes that are running and grep for something

`kill -9 something` - Brute force way to kill a process.

= Wifi = 
''unless `/sbin` as been added to the PATH variable, many of these commands require root priveleges''

`iwconfig ath0 essid WINMAIN` - Establishes WINMAIN as network we wish to connect to.

`ifconfig ath0 up` - Brings up the wireless interface

`iwconfig ath0` - Displays information about wireless connection. If "Access Point" reads "Not Associated," Execute this command repeatedly until an access point is associated.

`dhclient ath0` - Uses DHCP to obtain an IP address

`ifconfig ath0 up` - Brings up the wireless interface. Often this command needs to be executed again after an IP address has been obtained.

`iwlist ath0 scan` - Displays a list of wifi networks in the area.

= Remote Control =

`ssh -XC 192.168.xxx.xxx` - Connect to a computer with X11 forwarding and compression enabled

`xtightvncviewer -compression #` - Connect to a vnc server. # is a scale (0-9) with 0 being uncompressed and 9 being maximum compression. Max compression does not mean fastest since compression takes time.

= Files and the filesystem =

`updatedb` - Builds a database so the locate command can work

`locate something` - Finds files named something in the filesystem.