For some reason vim on Debian went crazy and stopped worked as vim. This is how to make it work like vim instead of vi.
cp /usr/share/vim/vim74/vimrc_example.vim ~/.vimrc
and change
" In many terminal emulators the mouse works just fine, thus enable it.
if has('mouse')
set mouse=a
endif
to
" In many terminal emulators the mouse works just fine, thus enable it.
if has('mouse')
set mouse=r
endif
Hooray.
This is how you can use traceroute for a specific port:
traceroute -T -p 3306 10.20.41.1
or the same:
traceroute --tcp -p 3306 10.20.41.1
ln -sf /usr/share/zoneinfo/UTC /etc/localtime
There’s a bug in rpm package: https://bugzilla.redhat.com/show_bug.cgi?id=304121
It causes the following error while building rpm packages:
/usr/lib/rpm/debugedit: canonicalization unexpectedly shrank by one character
As a workaround you can use this command:
rpmbuild -bb rpmbuild/SPECS/package.spec -D 'debug_package %{nil}'
It will disable building of debug package and that’s it.
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.