Its easy to create a bcrypt hash on commandline with this command: $> htpasswd -nbBC 10 USER PASSWORD Just replace the Placeholder USER and PASSWORD with the corresponding values. The Result should be something like that: USER:$2y$10$gfPbhclOrdjmMLEXSc5CTOWP5aBfjl59hhGvjp/qWXf1FfbQKb5ca The part before “:” is the username. The rest is the bcrypt password hash. The -C parameter specifies […]
Sometimes you need to encode a string with a base64 encoding. For example when trying to send a HTTP request with a Basic Authentication header like that: ### own controller: POST http://thedomain.com/webhook/post?XDEBUG_SESSION_START=11931 Content-Type: application/json Authorization: Basic c25zOlVzZVRoZWZvcmNlCg== { “uuid”: “08e9a8d3-9279-4af5-88ff-ebe42359f0e0”, “eventname”: “peng.page.publish”, “data”: { “sitemap_id”: “1234”, “locale”: “de_DE”, “path”: “unigue/page/path”, “title”: “Testpage over API”, “meta_title”: […]
This is how to wipe a disk via Linux shell: $> sudo shred -v -n2 -z /dev/sdc The command above erases all data on the device /dev/sdc and overrides the data 2Â times. Finally every bit is overridden by zeros. So in sum it takes 3 iterations to wipe a disk via Linux shell. n specifies […]
Today I wanted to setup monit behind Apache proxy on my webserver, which runs ISPConfig (https://www.ispconfig.org/) under Debian. Monit is a OpenSource monitoring tool for Linux (see https://mmonit.com/monit/). Requirements I had the following requirements on the solution: monit should only be accessible from the server itself (localhost) monit should run under a special SSL-secured URL (not IP:PORT as […]
Today I had the challenge, that I wanted to copy a DVD and  play it with the VLC media player (http://www.videolan.org/vlc/index.html). Therefore I had to learn how to mount iso file(s) under Linux. In my case it was Ubuntu 16.04.1. (see also my article about how to get your Linux distribution and version). How to […]
Lets imagine you want to search for a term in a file and you want to know, how often it can be found in the file. With this command combination you can count search results on bash: $> less xmlfile.xml | grep SearchmeIfYouCan | wc -l This is how this way to count search results […]
If you are working in teams using different operating systems, it could happen, that you get files with unsuitable linefeeds in it. For me as a Linux user the bad guys are normally CRLF’s (Carriage Return and Line Feed @see https://en.wikipedia.org/wiki/Newline). To just convert the CRLF’s in a single file to LF you can use the […]
You can connect to an SFTPÂ server via keyfile like that: $> sftp -v -o IdentityFile=”/PATH/TO/PUBLICKEYFILE(id_rsa)” -o Port=”10022″ user@host
This simple bash script is able to backup all given files and folders to a backup destination. I use it to backup all my Raspberry Pis, Banana Pis and also my notebook to my Synology NAS. Example call: If you want to run it as a crontab, you can use key based authentication (see SSH key […]
A very nice and really working recovery tool is  PhotoRec. It’s a very cool commandline tool for Linux which is able to recover all images on a SD or MMC card that have been deleted accidentally. In my case my fingers where faster than my brain and so I had kicked three rally awesome images :-/. […]
