Convert

MP4 to Webm
ffmpeg -i video.mp4 -c:v libvpx -crf 10 -b:v 1M -c:a libvorbis video.webm
MP4 to Webm
ffmpeg -i input.mp4 -c:v libtheora -q:v 7 -c:a libvorbis -q:a 4 output.ogv

Filter by response code:


#!/usr/bin/node
module.paths.push('/usr/lib/node_modules');
const fs = require('fs');
var data = {};
var params = process.argv[2];
function read(config={}){
  fs.readFile(params,'utf8',function(err,data){
    if(err) throw err;
    data = JSON.parse(data).log.entries;
    if(config.by.length>0){
      if(config.by[0]=='status'){
        data = data.filter(function(v){return v.response.status==config.by[1]}).map(function(v){return v.request.url});
      }
    };
    if(config.save){
      save()
    }else{
      console.log(data)
    }
  })
};
function save(){
  fs.writeFile(params.replace(/(\.har)$/,"-output$1"),JSON.stringify(data),function(err){if(err) throw err})
};
read({
  save:false,
  by:['status',404]
})

Separate string by character length

"This is String".replace(/(.{4})/,"$1\n")
Result:
This
 is 
Stri
ng

Audio

  • audacity apt-get install audacity

Video

Etc

Don't Log :

    
      SetEnvIf Remote_Addr "^((127\.0\.0\.1)|(\:\:1)|(192\.168\.1\.[1-2][0-5]?[0-6]))$" dontlog
      ErrorLog ${APACHE_LOG_DIR}/error.log
      CustomLog ${APACHE_LOG_DIR}/access.log combined env=!dontlog
    
  

After first install:

  • a2enmod rewrite
  • a2ensite default-ssl.conf
  • rm /var/www/html -rf && ln -s /path/to/html /var/www/html
  • Add <Directory ...> to /etc/apache2/sites-available/default-ssl.conf

command using dd:

umount /dev/sd<?><?>
dd bs=4M if=path/to/input.iso of=/dev/sd<?> conv=fdatasync  status=progress

Reference: https://askubuntu.com/questions/372607/how-to-create-a-bootable-ubuntu-usb-flash-drive-from-terminal
Search and replace (RegExp)

sed -i -E "s/<script.*?netbro_cache_analytics.*?<\/script>//" ./documentation.html
composer about
composer self-update
composer require <vendor/packagename>
composer global require <vendor/packagename>

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