You'll find here various tips and tricks on Networks, GNU/Linux and security

openssl s_client -connect www.somesite:443

• In GRUB, pass the following parameter :

init=bin/sh

• In the shell

mount -o remount,rw /

This will remount the root partition in read write mode

• Change root password

passwd

• Synchronise the disk

 sync

• Logout. The kernel Panic is normal.
• Reboot

• Use the following commands

 GET / HTTP/1.1
 Host: host.domain.tld
 Authorization: BASIC //base 64 password//

• To generate the base 64 password :

php -r "echo base64_encode('login:pass') ."n";"

First you will have to install the GNU/Screen The find out the virtual device to use :

 #dmesg | egrep --color 'serial|ttyS'
serial8250: ttyS0 at I/O 0x3f8 (irq = 4) is a 16550A
00:08: ttyS0 at I/O 0x3f8 (irq = 4) is a 16550A

Then, just launch screen with the following command

 # screen /dev/ttyXXX BaudRate [option]

Example:

screen /dev/ttyS0 19200,cs8

• Text Mode

 #loadkeys fr

• Under X

 #setxkbmap fr 

• Just for the current session

 setenforce 0

• For good

 setenforce 0

Then edit :

/etc/sysconfig/selinux

SELINUX=disabled

ifconfig eth1 down
ifconfig eth1 hw ether AA:BB:CC:11:22:33
ifconfig eth1 up

cp -p /var/log/wtmp  /var/backup/
> /var/log/wtmp 

This allow you to disable a user's password without disabling the account. The user wont be able to login.

passwd -d username

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