Linux sense is dedicated zone for linux/unix/bsd operating system and opensource softwares, web address : linux sense
Thursday, April 1, 2021
Thursday, January 7, 2021
How to install YuranPad editor in AntiX Linux
YuranPad is a free text editor for Windows and Linux.
1. Download the last version from YuranPad Home page :
https://sourceforge.net/projects/yuranpad/files/
2. Lunch this command in Terminal :
sudo apt install /home/brahim/Downloads\yuranpad_2.3_i386.deb
Wednesday, May 25, 2016
Mitigating DDoS Attacks : configure nginx to filter Http Flood
Try add like the following directives to your nginx webserver configuration to prevent from HTTP flooding attacks by limiting the rate of requests and limiting the number of connections for unique ip address (user) :
1. Edit your naginx config file
nano /etc/nginx/nginx.conf
and search for "http" tag :
http {
##
# Basic Settings
##
2. After "##"add the following directives :
#Limiting the Number of Connections for unique IP
limit_conn_zone $binary_remote_addr zone=limit_per_ip:10m;
limit_conn limit_per_ip 20;
#Limiting the Rate of Requests/s for unique IP
limit_req_zone $binary_remote_addr zone=allips:10m rate=60r/s;
limit_req zone=allips burst=60 nodelay;
3. now should your nginx config file looks like this :
http {
##
# Basic Settings
##
#Limiting the Number of Connections for unique IP
limit_conn_zone $binary_remote_addr zone=limit_per_ip:10m;
limit_conn limit_per_ip 20;
#Limiting the Rate of Requests/s for unique IP
limit_req_zone $binary_remote_addr zone=allips:10m rate=60r/s;
limit_req zone=allips burst=60 nodelay;
. . .
4. Save & exit
CTRL+X then y
5. restart your nginx webserver
service nginx restart
or use :
/etc/init.d/nginx restart
*** The best way to protect your website and server from common DDos attacks is to use incapsula solution : https://www.incapsula.com
1. Edit your naginx config file
nano /etc/nginx/nginx.conf
and search for "http" tag :
http {
##
# Basic Settings
##
2. After "##"add the following directives :
#Limiting the Number of Connections for unique IP
limit_conn_zone $binary_remote_addr zone=limit_per_ip:10m;
limit_conn limit_per_ip 20;
#Limiting the Rate of Requests/s for unique IP
limit_req_zone $binary_remote_addr zone=allips:10m rate=60r/s;
limit_req zone=allips burst=60 nodelay;
3. now should your nginx config file looks like this :
http {
##
# Basic Settings
##
#Limiting the Number of Connections for unique IP
limit_conn_zone $binary_remote_addr zone=limit_per_ip:10m;
limit_conn limit_per_ip 20;
#Limiting the Rate of Requests/s for unique IP
limit_req_zone $binary_remote_addr zone=allips:10m rate=60r/s;
limit_req zone=allips burst=60 nodelay;
. . .
4. Save & exit
CTRL+X then y
5. restart your nginx webserver
service nginx restart
or use :
/etc/init.d/nginx restart
*** The best way to protect your website and server from common DDos attacks is to use incapsula solution : https://www.incapsula.com
Monday, May 16, 2016
How to fix sudo command not found debian 8
This tutorial let you to fix : sudo after debian installation is missed.
-bash: sudo: command not found
1. Start debian in recovery mode (in Grub boot menu choose : Advanced options for Debian GNU/Linux)
2. Activate or reset root password with this command :
passwd root
and then enter your new root password
after that reboot recovery mode with this command :
reboot
3. After reboot, in Grub menu : choose Debian GNU/Linux with normal mode (NOT rescue mode)
4. in gnome desktop open terminal and enter this command line to login with root
su
5. Install sudo :
apt-get install sudo
6. Add your username to sudo group :
adduser yourusername sudo
now add your username to this file :
nano /etc/sudoers
then search for line with "%sudo ALL=(ALL:ALL) ALL" after this line put :
yourusername ALL=(ALL:ALL) ALL
exit file & save (ctrl+x then y)
7. now enter in terminal :
exit
to exit root to your defaut username
8. test with any command with sudo like : sudo apt-get install htop and enter your password now should sudo works
:-)
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