SSHD not restarting ?
below is the fix
cd /dev/
./MAKEDEV generic
Now try restarting SSH
Converting a database containing tables to utf8
mysqldump -uusername -ppassword -c -e –default-character-set=utf8 –single-transaction –skip-set-charset –add-drop-database -B dbname > dump.sql cp dump.sql dump-fixed.sql vim dump-fixed.sql :%s/DEFAULT CHARACTER SET latin1/DEFAULT CHARACTER SET utf8 COLLATE utf8_general_ci/ :%s/DEFAULT CHARSET=latin1/DEFAULT CHARSET=utf8/ :wq mysql -uusername -ppassword < dump-fixed.sql
Converting an empty database to utf8
use the below command in Mysql ALTER DATABASE mydatabasename charset=utf8;
SERVICE CURRENTLY NOT AVAILABLE! Error No. [500]
How to fix the 500 error on roundcube
/usr/local/cpanel/bin/update-roundcube –force
Postix on ubuntu
How to install postfix on Ubuntu
sudo apt-get install postfix sudo dpkg-reconfigure postfix sudo postconf -e 'home_mailbox = Maildir/' sudo /etc/init.d/postfix restart sudo apt-get install dovecot-common sudo apt-get install dovecot-imapd
sudo apt-get install dovecot-pop3d
sudo useradd -d /home/testuser -m testuser sudo passwd testuser
Increase phpmyadmin upload size in cPanel
How to increase the memory for PHPmyadmin in cPanel server
vi /usr/local/cpanel/3rdparty/etc/php.ini
and change
upload_max_filesize = 150M
post_max_size = 150M
then run in SSH
/usr/local/cpanel/bin/install_php_inis
service cpanel restart
iptables v1.3.5: Couldn’t load match `statistic’
Getting error in iptables ?
use below steps to get it resolved
yum -y update
iptables -m statistic -h
modprobe -l |grep statistic
rpm -q iptables
wget http://pkgs.org/centos-5-rhel-5/centalt-x86_64/ipt_statistic-0.1-1.el5.x86_64.rpm.html
wget http://pkgs.org/centos-5-rhel-5/centalt-x86_64/ipt_statistic-0.1-1.el5.x86_64.rpm
wget http://centos.alt.ru/repository/centos/5/x86_64/centalt-release-5-3.noarch.rpm
rpm -Uvh centalt-release*rpm
How to mitigate DDOS ?
Getting DDOS from rival companies ?
Even we had but we do have a tachnique to mitigate its impact
Use the below IPTABLES rule on your server and it should get mitigated
A INPUT -p tcp –dport 80 -i eth0 -m state –state NEW -m recent –set
/sbin/iptables -A INPUT -p tcp –dport 80 -i eth0 -m state –state NEW -m recent –update –seconds 8 –hitcount 13 -j DROP
You can contact us for any assistance for any issues related to Linux.
vzquota on failed [3]
“vzquota on failed [3]”
vzquota : (error) Quota on syscall for id 8001: No such file or directory
vzquota on failed [3]
Getting above error in openvz vps ?
This is due to disk quota being on in config file.
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Login to main hardware node
open below config file associated with VPS whre my VPSID is 8001
vi /etc/sysconfig/vz-scripts/8001.conf
Add below line in config file
DISK_QUOTA=no Now restart vps and all should work as charm
Limit connection on port 80 using IPTABLES
iptables -I INPUT -p tcp –dport 80 -i eth0 -m state –state NEW -m recent –update –seconds 60 –hitcount 5 -j DROP
This will allow only 5 connection simultanously from per IP.
This can also be to stop ddos attack on webserver.