Category: OS

Apache Bench – 5 Minutes for realistic test – 1/10/50/100/200/300/400/500/800/1000 Concurrent Users – latency, error rate, success rate, response time # CORRECT – this does 1000 requests to the URL. No problems here. ab -n 1000 http://my-test-service.com # WRONG – this always does requests to the URL for 60 seconds. ab -t 60 http://my-test-service.com #…

Here are a couple of commands to help find top memory wasters Process – Sorted by occupied memory(2 column) ps -e -orss=,pid=,args= | sort -nr | head|awk ‘{print $2″\t”$1/1024″\tMB\t”$3;}’ Method 2 cat /proc/meminfo |grep MemTotal echo ‘ ‘ | awk ‘{ system(“cat /proc/meminfo |grep MemTotal”) }’ totalmem=$(cat /proc/meminfo |grep MemTotal | awk ‘{print $2}’); ps…

#sudo netstat -lnptu|grep : #check what is running on port 80 sudo netstat -lnptu|grep :80

VMSTAT vmstat 1 htop sudo apt-get install -y htop sudo htop atop sudo apt-get install atop -y sudo atop How to Find the Most Memory taking process in Ubuntu Linux Some Times system administrators need to kill the memory eater process. When your system become slower, check the following command and find the memory eater.…

The Fix sudo apt-get purge -y firefox firefox-* cd ~ sudo rm -rf .mozilla/firefox/ .macromedia/ /etc/firefox/ /usr/lib/firefox/ /usr/lib/firefox-addons/ sudo apt-get purge -y firefox firefox-* sudo apt-get install -y firefox Also don’t delete cookies after the re-installation, if you imported data on the first run from Chrome or Opera. https://support.mozilla.org/sv/questions/938531

Generate new Locales perl: warning: Please check that your locale settings: LANGUAGE = (unset), LC_ALL = (unset), LC_PAPER = “de_DE.UTF-8”, LC_ADDRESS = “de_DE.UTF-8”, LC_MONETARY = “de_DE.UTF-8”, LC_NUMERIC = “de_DE.UTF-8”, LC_TELEPHONE = “de_DE.UTF-8”, LC_IDENTIFICATION = “de_DE.UTF-8”, LC_MEASUREMENT = “de_DE.UTF-8”, LC_CTYPE = “UTF-8”, LC_TIME = “de_DE.UTF-8”, LC_NAME = “de_DE.UTF-8”, LANG = “en_US.UTF-8” are supported and installed on…

Extraction Script #!/bin/bash fullfilepath=$1 filename=”${fullfilepath%.*}” echo $filename #determine file extension extension=$(ffmpeg -i “$fullfilepath” 2>&1 | grep Audio|sed ‘s/.*Audio: \([a-z0-9]\+\).*/\1/ig’) echo $extension audiofilename=”$filename.$extension” echo $audiofilename ffmpeg -i “$fullfilepath” -vn -acodec copy “$audiofilename” #ffmpeg -i “$fullfilepath” -vn -ab 160k -ac 2 -ar 44100 “$filename.mp3” Extract Audio in Video as MP3 find . -name “*.flv” -type f -exec…