Linux, programming and more
Quick and easy – generate self-signed certificate in one line:
1 | openssl req -new -newkey rsa:4096 -days 365 -nodes -x509 -keyout ipv6.mysql.idrobot.net.key -out ipv6.mysql.idrobot.net.crt |
Country Name (2 letter code) [AU]:DE
State or Province Name (full name) [Some-State]:Niedersachsen
Locality Name (eg, city) []:Hannover
[Internet Widgits Pty Ltd]:ipv6.mysql.idrobot.net
Organizational Unit Name (eg, section) []:
Common Name (eg, YOUR name) []:Igor Drobot
Email Address []:id@drobot.de
Parsing kernel orgs changelogs can be a pain.
Here’s a handy one-liner to make it easier to read:
1 | wget --quiet -O - http://www.kernel.org/pub/linux/kernel/v2.6/ChangeLog-2.6.37 | grep -A 4 ^commit | grep -B 1 "^--" | grep -v "^--" |
You should become human readable output like this one:
1 2 3 4 5 6 7 | perf: Remove unused variable
x86, bios: By default, reserve the low 64K for all BIOSes
mlx4_en: Fix build warning in mlx4_en_create_rx_ring.
mlx4_en: updated driver version
mlx4_en: Moving to work with GRO
mlx4_en: UDP RSS support
mlx4_en: reconfiguring mac address. |
The best uses I’ve found for the SIGSTOP and SIGCONT signals are times when a process goes haywire, or when a script spawns too many processes at once.
Usage Examples for both signals:
1 2 | kill -SIGSTOP [pid] kill -SIGCONT [pid] |
Etckeeper is a useful tool to store /etc in a version control system. It allows you to read the changes that have been made to the files in /etc, document these changes and recover a previous version of a modified file in case we made some changes that we don’t want to keep. It’ s a great system to control your server and find very quickly solutions.
Its installation is very trivial:
1 | aptitude install etckeeper |
SSH is an acronym which stands for Secure SHell, which provides a secure shell access to a remote machine.
This brut force tool is great to test some security stuff like iptables or sshguard.
You are able to see the proceeder of real hacking attempt.
Like most brute forcing tools, you’ll first need a pretty big passlist. You can get one from here:
1 | wget https://zeldor.biz/other/bruteforce/passlist.txt |