List of useful commands for ubuntu server

UbuntuCommands.md

ADD USER

sudo adduser newuser

sudo adduser newuser root

sudo adduser newuser sudo

sudo usermod -a -G www-data newuser

sudo groupadd {groupname}

sudo adduser {username} {groupname}

SOLVING PERMISSION ISSUES BY MOUNTING A COPY

http://blog.netgusto.com/solving-web-file-permissions-problem-once-and-for-all/

PERMISSIONS FOR WORDPRESS

sudo find . -type f -exec chmod 664 {} +

sudo find . -type d -exec chmod 775 {} +

sudo chmod 660 wp-config.php

DDOS SOLVING

/sbin/iptables -L -v

netstat -ntu | awk '{print $5}' | cut -d: -f1 | sort | uniq -c | sort -n

/sbin/iptables -I INPUT -s XX.XX.XX.XX -j DROP

sudo /sbin/iptables-save

SAMBA

sudo apt-get update

sudo apt-get install samba

sudo smbpasswd -a <user_name>

sudo nano /etc/samba/smb.conf

----- ADD AT THE END -----

[{my-folder}]

path = /var/www/html/{my-folder}

valid users = @{groupname}

read only = no

create mode = 0777

directory mode = 0777

sudo service smbd restart

PHPMYADMINA INSTALLATION

sudo apt-get update

sudo apt-get install phpmyadmin

PUT THE CHECKMARK FROM SPACE TO APACHE2 AND ON dbconfig-common SAY YES

sudo php5enmod mcrypt

sudo service apache2 restart

MYSQL COMMANDS

mysql -u {username} -p

---- in mysql ----

show databases;

select {databasename}

show tables;

mysql query;

ADD AUTH KEYES

nano ~/.ssh/authorized_keys

RANDOM USEFUL COMMANDS

Write full size in MB

ls -l --block-size= M

Empty file

truncate -s 0 {filename}

Process view

htop

Change owner of a directory

sudo chown -r {user}:{group} foldername/

Restart server/mysql service

sudo reboot

sudo service mysql restart

View last X number of lines in a file

tail filename -n X