Step 1:
Install mysql on master 1 (slave 2) and slave 1 (master2).
#yum install mysql-server mysql

Master 1 (slave 2) ip: 10.0.0.1
Slave 1 (master 2) ip: 10.0.0.2

Step 2:
On Master 1, change /etc/my.cnf as follow:

[mysqld]
datadir=/var/lib/mysql
socket=/var/lib/mysql/mysql.sock
old_passwords=1
user=mysql
log-bin=mysql-bin
server-id=1

[mysqld_safe]
log-error=/var/log/mysqld.log
pid-file=/var/run/mysqld/mysqld.pid

Step 3:
Logon to mysql on master 1 (in our case the server with ip 10.0.0.1):
mysql> grant replication slave on *.* to ‘repl‘@’%’ identified by ‘WhatYouwant‘;

After this restart the mysql on master 1

We used the % but you can set here also 10.0.0.2 for a more secure server!

Step 4:
On slave 1 (in our case the server with ip 10.0.0.2) edit /etc/my.cnf as follow:

[mysqld]
datadir=/var/lib/mysql
socket=/var/lib/mysql/mysql.sock
user=mysql
old_passwords=1
server-id=2

[mysqld_safe]
log-error=/var/log/mysqld.log
pid-file=/var/run/mysqld/mysqld.pid

Step 5:
Logon to mysql master 1:
mysql> show master status;
+——————+———-+————–+——————+
| File             | Position | Binlog_Do_DB | Binlog_Ignore_DB |
+——————+———-+————–+——————+
| mysql-bin.000007 |     2013 |              |                  |
+——————+———-+————–+——————+
1 row in set (0.00 sec)

Step 6:

Logon to mysql on slave 1 and use the infomation from step 5:
mysql>CHANGE MASTER TO MASTER_HOST=’10.0.0.1′, MASTER_USER=’repl‘, MASTER_PASSWORD=’WhatYouWant‘, MASTER_LOG_FILE=’mysql-bin.000007‘, MASTER_LOG_POS=2013;
mysql>start slave;
mysql>show slave status\G

*************************** 1. row ***************************
Slave_IO_State: Waiting for master to send event
Master_Host: 10.0.0.1
Master_User: repl
Master_Port: 3306
Connect_Retry: 60
Master_Log_File: mysql-bin.000007
Read_Master_Log_Pos: 2013
Relay_Log_File: mysqld-relay-bin.000003
Relay_Log_Pos: 2150
Relay_Master_Log_File: mysql-bin.000007
Slave_IO_Running: Yes
Slave_SQL_Running: Yes
Replicate_Do_DB:
Replicate_Ignore_DB:
Replicate_Do_Table:
Replicate_Ignore_Table:
Replicate_Wild_Do_Table:
Replicate_Wild_Ignore_Table:
Last_Errno: 0
Last_Error:
Skip_Counter: 0
Exec_Master_Log_Pos: 2013
Relay_Log_Space: 2150
Until_Condition: None
Until_Log_File:
Until_Log_Pos: 0
Master_SSL_Allowed: No
Master_SSL_CA_File:
Master_SSL_CA_Path:
Master_SSL_Cert:
Master_SSL_Cipher:
Master_SSL_Key:
Seconds_Behind_Master: 0
1 row in set (0.00 sec)


Step 7:
Now we going to make slave 1 -> master 2 and master 1 -> slave 2 so the master-master replication will work!
On slave 1 (ip 10.0.0.2) we add a rule to /etc/my.cnf:
[mysqld]
datadir=/var/lib/mysql
socket=/var/lib/mysql/mysql.sock
user=mysql
old_passwords=1
server-id=2
log-bin

[mysqld_safe]
log-error=/var/log/mysqld.log
pid-file=/var/run/mysqld/mysqld.pid

Step 8:
On slave 1 (ip 10.0.0.2 in our example) create the replication in mysql:
mysql> grant replication slave on *.* to ‘repl’@'%’ identified by ‘WhatYouWant‘;

You can change the % to be more safe in 10.0.0.1!

mysql> show master status;
+——————-+———-+————–+——————+
| File              | Position | Binlog_Do_DB | Binlog_Ignore_DB |
+——————-+———-+————–+——————+
| mysqld-bin.000005 |      314 |              |                  |
+——————-+———-+————–+——————+
1 row in set (0.00 sec)

Step 9:
On master 1 (ip 10.0.0.1 in our example) add the user to mysql (use information from step 8):

mysql>CHANGE MASTER TO MASTER_HOST=’10.0.0.2′, MASTER_USER=’repl’, MASTER_PASSWORD=’WhatYouWant‘, MASTER_LOG_FILE=’mysqld-bin.000005‘, MASTER_LOG_POS=314;

Step 10:
Restart both mysql services on master 1 (slave 2) and slave 1 (master 2).

On master 1:
mysql> start slave;

On slave 1:
mysql> show master status;

On master 1:
mysql> show slave status\G

So now you can test on both servers if your config works! Hope you enjoy the tutorial and have a safe configuration! If you want safe hosting with this solution you can also take hosting by Netdistri bvba

#yum install postfix smtpd

edit /etc/postfix/main.cf

myhostname = your.domain.tld

virtual_alias_domains = redirectdomain1.tld, redirectdomain2.tld
virtual_alias_maps = hash:/etc/postfix/virtual

edit /etc/postfix/virtual

address@redirectdomain1.tld   addresto@domainto.tld

@redirectdomain2.tld  addresstocatchall@domaintoxx.tld

After this run the following commands:

# postalias /etc/aliases
# postmap /etc/postfix/access
# postmap /etc/postfix/virtual
# postmap /etc/postfix/transport
# cp /etc/aliases /etc/postfix/
# newaliases
# postfix reload

Now the server is ready to forward your mails!!!

/usr/share/tomcat5/psa-users/

to {domain}.xml where {domain} is the full domain name to be removed.

pidnr vervangen door de nr van het process

http://kb.swsoft.com/en/2169

echo 1 >/proc/sys/net/ipv4/icmp_echo_ignore_all

Only one thing left to do, you also want to get this after a reboot, so put in /etc/sysctl.conf.:

net.ipv4.conf.icmp_echo_ignore_all = 1

[updates-released]
name=Fedora Core $releasever – $basearch – Released Updates
baseurl=ftp://alviss.et.tudelft.nl/pub/fedora/core/updates/$releasever/$basearch
#baseurl=http://download.fedora.redhat.com/pub/fedora/linux/core/updates/$releasever/$basearch/
Hopefull someone could use this!

1) use the option –skip-lock-tables in mysqldump

2) edit /etc/my.cfg and add following line under category [mysqld]: open_files_limit=16384

After 2 restart mysql!

#fuser 443/tcp
443/tcp: xxxx yyyy zzzz <- proceses using 443

#kill -9 xxxx yyyy xxxx
#service httpd start

Now installing quota and ftp so the system could work as meant!