Difference between revisions of "Ubuntu Tips"
From wikidb
(→ssh using on Mac) |
(→ssh) |
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* [https://help.ubuntu.com/12.04/serverguide/openssh-server.html OpenSSH Server] set up | * [https://help.ubuntu.com/12.04/serverguide/openssh-server.html OpenSSH Server] set up | ||
+ | |||
+ | Two ways to start service | ||
sudo /etc/init.d/ssh start | sudo /etc/init.d/ssh start | ||
sudo service ssh start | sudo service ssh start | ||
+ | |||
+ | Two was to stop service | ||
sudo /etc/init.d/ssh stop | sudo /etc/init.d/ssh stop |
Revision as of 10:52, 8 September 2015
Contents
Run Levels
runlevel telinit 3
Install
- Package search
sudo aptitude search phidget
Each search result is listed on a separate line.
- The first character of each line indicates the current state of the package:
- p, no trace of the package exists on the system,
- c, the package was deleted but its configuration files remain on the system,
- i, the package is installed, and
- v, the package is virtual.
- The second character indicates the stored action (if any; otherwise a blank space is displayed) to be performed on the package,
- i, the package will be installed,
- d, the package will be deleted, and
- p, the package and its configuration files will be removed.
- If the third character is
- A, the package was automatically installed.
The follow provides some of the above info
apt-cache search opencv
- Detailed description of a package
apt-cache show opencv-do
- List the files in a package
dpkg -L opencv-doc
- Find the package a file is in
dpkg -S highgui.h
- Remove unneeded packages
apt-get auto remove
- Get source
apt-get source phidget
Text Mode
Reference: Modify Ubuntu for text mode
root@tabor:init# diff rc-sysinit.conf rc-sysinit.conf.org 14c14 < env DEFAULT_RUNLEVEL=3 --- > env DEFAULT_RUNLEVEL=2
root@tabor:init# diff gdm.conf gdm.conf.org 13d12 < and runlevel[!3]
The result in gdm.conf should be:
start on (filesystem and started dbus and (drm-device-added card0 PRIMARY_DEVICE_FOR_DISPLAY=1 or stopped udevtrigger)) and runlevel[!3] stop on runlevel [016]
Warning: Don't have an SD card connected to the USB port - maybe it tried to boot from it?
To get it going in X.
startx
Won't Boot
Boot from the 10.04 Install CD.
sudo mkdir /media/tmp mount /dev/sda1 /media/tmp cd /media/tmp/etc fix things
ssh
- OpenSSH Server set up
Two ways to start service
sudo /etc/init.d/ssh start sudo service ssh start
Two was to stop service
sudo /etc/init.d/ssh stop sudo service ssh stop
ssh using on Mac
ssh -X eepp@10.0.0.122
system load
uptime top dstat cat /proc/loadavg
load from wikipedia
change hostname
- Edit /etc/hostname , make the name change, save the file.
- You should also make the same changes in /etc/hosts file.
- Run sudo /etc/init.d/hostname restart or sudo service hostname restart. (There is no hostname init script so I rebooted.)
- change name
Printing
Something like:
- Preferences -> Printers
- Add
- Device first expand Network Printer
- Device choose Network Printer
- Enter 10.0.0.3 as Host and press find
Also install ascii 2 ps
sudo apt-get install a2ps
find
find /opt/ros/jade/ -name *.so -exec grep CamShift "{}" ";"