Ubuntu
Aus Programmers Guide
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| - | == Performance on Startup == | + | == Prozessortakt / CPU Performance on Startup == |
To start up Ubuntu in "performance" and not in the "ondemand" mode, you have to run the following "script" as root on startup | To start up Ubuntu in "performance" and not in the "ondemand" mode, you have to run the following "script" as root on startup | ||
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== SCP == | == SCP == | ||
Version vom 16:00, 14. Apr. 2011
Inhaltsverzeichnis |
Ist ein Neustart nötig / Reboot required
if [ -f /var/run/reboot-required ]; then echo "jepp"; fi
Installierte Pakete anzeigen
dpkg --get-selections
Prozessortakt / CPU Performance on Startup
To start up Ubuntu in "performance" and not in the "ondemand" mode, you have to run the following "script" as root on startup
#write the script echo '#!/bin/bash echo "performance" | tee /sys/devices/system/cpu/cpu0/cpufreq/scaling_governor echo "performance" | tee /sys/devices/system/cpu/cpu1/cpufreq/scaling_governor exit 0' > /etc/init.d/poweron #make it executable chmod +x /etc/init.d/poweron #add to autostart update-rc.d poweron defaults 99 01
SCP
Datei kopieren
#Kopiert die test.txt zum 2.Rechner scp -r /home/<user>/test.txt username@192.168.0.1:/home/<user>/
VMWare-Tools
#Header und den gcc Compiler installieren sudo apt-get install linux-headers-`uname -r` build-essential psmisc #evtl bei nem VMX: sudo mount /dev/cdrom /media/cdrom0/ #kopieren und entpacken der Dateien cp /media/cdrom0/VMwareTools-4.0.0-193498.tar.gz /tmp/ cd /tmp/ tar xvf VMwareTools-4.0.0-193498.tar.gz cd vmware-tools-distrib/ sudo ./vmware-install.pl #What is the location of the directory of C header files that match your running kernel? /lib/modules/2.6.28-18-server/build/include/
SSH
Siehe dazu: SSH
DNS
"server" is the real domain xxx.dyndns.orgroy@machine:~$ ssh user@server ssh: Could not resolve hostname roy@machine:~$ ping server PING server (xx.xx.xx.xx) 56(84) bytes of data. 64 bytes from port-xxx-xxx-xxx-xxx.dynamic.qsc.de (xx.xx.xx.xx): icmp_seq=1 ttl=56 time=93.6 ms 64 bytes from port-xxx-xxx-xxx-xxx.dynamic.qsc.de (xx.xx.xx.xx): icmp_seq=1 ttl=56 time=91.9 ms 64 bytes from port-xxx-xxx-xxx-xxx.dynamic.qsc.de (xx.xx.xx.xx): icmp_seq=1 ttl=56 time=90.0 ms 64 bytes from port-xxx-xxx-xxx-xxx.dynamic.qsc.de (xx.xx.xx.xx): icmp_seq=1 ttl=56 time=89.3 ms ^C --- server ping statistics --- 4 packets transmitted, 4 received, 0% packet loss, time 3004ms rtt min/avg/max/mdev = 89.391/91.242/93.623/1.697 ms #seems okay sudo vim /etc/nsswitch.conf #remove the NOTFOUND clause roy@machine:~$ ssh user@server Warning: Permanently added the RSA host key for IP address 'xx.xx.xx.xx' to the list of known hosts. user@servers password: xxx Linux server2.6.32-25-generic #44-Ubuntu SMP Fri Sep 17 20:26:08 UTC 2010 i686 GNU/Linux Ubuntu 10.04.1 LTS ... #allright :-)
to setup a own DNS see DNS-Server
Multimedia
Rip VCD or SVCD to MPG-File
vcdxrip #copy the VCD into the current folder and name it "avseq01.mpg" vcdxrip -p #same but show the progressbar #if these examples wouldn't work vcdxrip -i /dev/sr0 -p
Merge two or more Video-Files
#first way: sudo apt-get install mencoder mplayer cat video1.mpg video2.mpg > compiled.mpg #Repair... mencoder -forceidx -oac copy -ovc copy compiled.mpg -o final.mpg # #OR # #second way sudo apt-get install mpgtx mpgtx -j video1.mpg video2.mpg -o final.mpg # #an avi Example mencoder -oac copy -ovc copy 1.avi 2.avi -o 1and2.avi
convert and burn these file
My favorite way to convert the MPG-File to DVD-Standard is the graphical Coding Program "DeVeDe". Once created the Image burn it with a Standard-Tool in your Distribution.
Ubuntu von einer CF-Card laufen lassen
Mein Ubuntu-Server läuft mit einer CF-Karte sehr stabil, ich habe allerdings diese 8GB-Karte auch nich vom billigsten Hersteller gekauft und auf die Übertragungsgeschwindigkeiten (Lese-/Schreibgeschwindigkeit) geachtet.
roy@server:/s$ sudo hdparm -Tt /dev/sda [sudo] password for roy: /dev/sda: Timing cached reads: 396 MB in 2.00 seconds = 197.51 MB/sec Timing buffered disk reads: 68 MB in 3.08 seconds = 22.04 MB/sec
