VirtualTam's bookmarks

21. ALSA: multiple USB sound cards 2015-01-12

    tags: audio, card, device, linux, linux/alsa, sound

    [ permalink ]

    # /etc/modprobe.d/snd_usb_audio.conf
    options snd_usb_audio vid=<vid1>,<vid2> pid=<pid1>,<pid2> index=<index1>,<index2> enable=1,1
    

    example:

    # 5: M-Audio Fast Track Pro 
    # 6: Focusrite Scarlett 6i6
    options snd_usb_audio vid=0x763,0x1235 pid=0x2012,0x8012 index=5,6 enable=1,1
    

    See also: http://alsa.opensrc.org/MultipleCards

22. Starting and Accessing Jenkins 2015-01-09

    tags: continuous-integration, continuous-integration/jenkins, memory, performance, programming/java, service, virtual

    [ permalink ]

    To increase the memory allocated and available:

    1# /etc/default/jenkins
    2JAVA_ARGS='Xms4G -Xmx16G -Djava.awt.headless=true'
    

    See also

    • Jenkins performance hints: http://soldering-iron.blogspot.com/2014/01/jenkins-performance-hints.html
    • Java commandline options: http://docs.oracle.com/javase/7/docs/technotes/tools/windows/java.html
23. grep options 2014-06-21

    tags: development, find, grep, linux, programming/shell, terminal

    [ permalink ]

    export GREP_OPTIONS='-nRI --color=always --exclude-dir=pycache --exclude-dir=.nodeproject --exclude-dir=CVS --exclude-dir=SVN --exclude-dir=.git --exclude-dir=.hg'