if you need to send emails from your Postfix server using MX records instead of local delivery you should leave the following line empty:
mydestination = $myhostname, localhost.$mydomain, localhost
in /etc/postfix/main.cf.
This way:
mydestination =
And restart the server:
/etc/init.d/postfix restart
If for some reasons you need to change a partition name and you don’t neeed to re-format the partiotion you can use e2label :
e2label /dev/sdb1 <LABEL>
And that’s it.
To provide best website performance it makes sense to minify static HTML files. There several ways to do that. One of the most easiest is to use django-htmlmin. To install run:
python-pip install django-htmlmin
To minify run:
pyminify index.html > index_minified.html
It would make sense to tar/zip files before you minify them.
You can also use it as a library for Flask and, obviously, Django. Check the documentation to get the details.
Here’s a problem:
[root@it2 /]# service iptables save iptables: Saving firewall rules to /etc/sysconfig/iptables: /etc/init.d/iptables: line 268: restorecon: command not found [FAILED] [root@it2 /]#
And here’s the solution:
yum install policycoreutils
fail2ban is a simple daemon (written in Python, BTW) which monitors your Linux server logs and is able to prevent bruteforce attacks by adding bad IP addresses to iptables. This is a simple self reminder on how to setup it.
yum install fail2ban
vim /etc/fail2ban/jail.conf
If you want fail2ban to only notify you (and not add them to iptables) modify the configuratio files this way:
action = sendmail-whois[name=SSH, [email protected], [email protected]]
It would be wise to add your IP addresses to be ignored:
ignoreip = 127.0.0.1/8
Start:
service fail2ban start
Enable auto start:
chkconfig fail2ban on
Now if somebody tries to brueforce your SSH you’ll get a mail.