sbt‘s log level can be set by execute set logLevel := Level.Error inside sbt.
How to set the sbt log level at the command line?
Add --error to sbt for specify the logLevel to error:
sbt --error "your command"
Two notices: 1, a process has only one main thread which is itself. 2, a process has many threads. Solution 1: Please use taskstats [1] related interfaces, and send TASKSTATS_TYPE_PID and TASKSTATS_TYPE_TGID commands to kernel to get a process’s ‘blkio_delay_total’ parameter for a process with one main thread and a process with threads separately. Solution…
How to capture camera photo/video using MPlayer on Linux? You can watch the video from the camera by MPlayer: # mplayer tv:// Note that you need the root privilege to play the tv://. You can use mplayer to capture photos by: # mplayer -vo png -frames 3 tv:// If will store files 0000000{1..3}.png in the…
Update on Nov. 18, 2012: ATI fglrx driver works well on Fedora 17 with GNOME 3 Shell. Should work well with later releases. Great driver, ATI! Update on Nov. 29, 2011: ATI fglrx driver works on Fedora 16 with GNOME 3 Shell with Catalyst driver 11.11 (xorg-x11-drv-catalyst-11.11). Update on Oct. 9, 2011: GNOME 3 shell…
How to split a string by string in PHP? For example, “a string separated by space” => [“a”, “string”, “separated”, “by”, “space”] and “a,string,separated,by,comma” => [“a”, “string”, “separated”, “by”, “comma”] The commonly used `explode()` is not enough here because multiple delimiters should be consider as one (such as ” “, 3 spaces together, is consider…
How to test whether a string $str contains another string $needle in Bash? You can use this piece of Bash script: [[ “$str” == *”$needle”* ]] A usage example: $ str=”abcde hello” $ needle1=”deh” $ needle2=”de hello” $ [[ “$str” == *”$needle1″* ]] && echo “matched” $ [[ “$str” == *”$needle2″* ]] && echo “matched”…
It is continuously discussed that some Fedora users do not like the font rendering in Fedora Linux and there are solutions to improve the font rendering with potentially non-free or non-licensed software/fonts. However, with only the open source fonts and software and little tricks, the font rendering on Fedora can be quite good. In this…