Category Archives: Linux

This is where all my linux pages will live.

Delivering root mail locally while relaying others

In order to deliver some accounts locally, you can set up virtual aliases as follows: 1. Add the following line to /etc/postfix/main.cf: virtual_alias_maps = hash:/etc/postfix/virtual mail_spool_directory=/var/spool/mail 2. Create /etc/postfix/virtual as follows: root root@localhost 3. postmap /etc/postfix/virtual 4. Restart postfix Note: … Continue reading

Posted in Linux | Comments Off on Delivering root mail locally while relaying others

strace

strace -s 512 -f lsyncd -pidfile /etc/lsync.lua

Posted in Linux | Comments Off on strace

Checking whether a key and cert match using openssl

openssl rsa -noout -modulus -in server.key | openssl md5 openssl x509 -noout -modulus -in server.crt | openssl md5

Posted in Linux, OPENSSL and TLS | Comments Off on Checking whether a key and cert match using openssl

Using blackbox to change multiple dns records for account

browse to https://clouddns.dcx.rackspace.com/zones/search Enter the account number and click Exact Search copy the lines from the console to a file called domainlist.txt domainlist.txt=================== 1 View accidentlawyerny.net 2 View acnestories.com 3 View acnewonders.com 4 View aromatherapyrecipe.com 5 View attorneyny.us 6 View … Continue reading

Posted in Linux | Comments Off on Using blackbox to change multiple dns records for account

Make fail2ban send emails

Edit /etc/fail2ban/jail.conf as follows: action = %(action_)s gets changed to action = %(action_mw)s which causes fail2ban to execute an action shortcut that sends mail: #########section of jail.conf############################################ # Action shortcuts. To be used to define action parameter # The simplest … Continue reading

Posted in Linux | Comments Off on Make fail2ban send emails

Changing munin password

To change the serverinfo password for munin, htpasswd /etc/munin/munin-htpasswd serverinfo To test, go to http://IP/munin

Posted in Linux | Comments Off on Changing munin password

Adding usb device to qemu in kvm

HOWTO: Use USB devices in Virtual Machine Manager with QEMU

Posted in Linux | Comments Off on Adding usb device to qemu in kvm

Deny POST to a site in .htaccess

 <limit POST OPTIONS>   Order deny,allow   Deny from all  </limit>

Posted in Linux | Comments Off on Deny POST to a site in .htaccess

Useful find Commands

The find command is very verstile, and I use it all the time. Here are the parameters that I use most often:-name <string> Finds files in specified directory whose name matches (case-sensitive) string-iname <string> Finds files in specified directory whose … Continue reading

Posted in Linux | Comments Off on Useful find Commands

Method to keep private libraries private

One method I have seen programmers (including myself) use to keep folks out of private libraries / include modules is to put a check in there. Easiest example: in index.php (or any script with permission to be called directly), this … Continue reading

Posted in Linux | Comments Off on Method to keep private libraries private