Category Archives: Servers

Ham Radio, Servers

Allstar Functions

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Defining Functions in Allstar

 

Define these functions in /etc/asterisk/rpt.conf in the functions section.

 

1=ilink,1 ; disconnect link = *1<node>
2=ilink,2 ; monitor link = *2<node>
3=ilink,3 ; connect link transceive = *3<node>
4=ilink,4 ; remote command = *4<node>
5=macro,1 ; execute macro = *5<macro#>
70=ilink,5 ; system status
71=ilink,11 ; disconnect permanently connected link = *71<node>
72=ilink,12 ; connect link permanent monitor = *72<node>
73=ilink,13 ; connect link permanent transceive = *73<node>
75=ilink,15 ; play full system status
76=ilink,6 ; disconnect all links
77=ilink,16 ; reconnect previously disconnected links Continue reading Allstar Functions →

Servers, Uncategorized, Work

Remove Old Kernels Ubuntu

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Try to do a release upgrade I ran into the issue of /boot not having enough free space.  Here is how to resolve that.

 

Check which kernel you are actively using. DO NOT REMOVE THIS ONE!

uname -r

View all kernels installed on your system.

dpkg --list | grep linux-image

Remove the kernels not in use

apt-get purge linux-image-x.x.x.x-generic

Update grub

update-grub2

Reboot

 

Servers, Web Sites, Work

Run Vhosts Under Separate UIDs/GIDs Apache2

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To run vhosts under separate UIDs/GIDs in apache is very easy with mpm-itk.  This will help secure your sites on your shared server.

First install apache2-mpm-itk

apt-get install apache2-mpm-itk

Next add a group and user

groupadd web1
useradd -s /bin/false -d /home/web1_admin -m -g web1 web1_admin

Now add this to the end of your vhost for your site. Be sure to place this inside the </virtualhost> tag and not outside of it.

AssignUserId web1_admin web1

For each of your sites you will user a different username and group. Now be sure to set your web directory to the correct user and group.

Example:

chown -R web1_admin:web1 /var/www/website
Servers, Work

Add User to Nagios

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It is not exactly easy to add a new user to Nagios but this is how it can be done.

 

If using ubuntu you will need to modify /usr/local/nagios/etc/cgi.cfg

The important one to view the information on the web interface is “authorized_for_system_information”.  It should look like this if you are adding multiple users.

authorized_for_system_information=nagiosadmin,cbrown,jcutright

There are more fields that you can use.  These are all the categories that nagiosadmin (the default account) is in.

authorized_for_configuration_information
authorized_for_system_commands
authorized_for_all_services
authorized_for_all_hosts
authorized_for_all_service_commands

Continue reading Add User to Nagios →

Servers

Restart Networking Ubuntu 14.04

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Of  course they had to change the way you restart interfaces in Ubuntu 14.04.  Here is how to restart your interface.  Make sure you select the correct interface, the example below is for eth0.  You can check you interface name in ifconfig.

ifdown eth0 && ifup eth0

To add DNS after adding a static IP you will need to set your name servers in /etc/resolvconf/resolv.conf.d/base

Example:

nameserver 8.8.8.8
nameserver 8.8.4.4

Update resolvconf

resolvconf -u

Then restart resolvconf for shits and giggles

service resolvconf restart
OSX, Servers, Web Sites

Compare Directories and Files with Diff

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Sometimes working with a directory full of subdirectories and files you need to compare the directories and files to another version of the files.  This comes in extremely useful when restoring a hacked website.  To do this you need to have the old copy and the current copy in two different directories on your system.  Then run the command below replacing DIR1 and DIR2 with the directoires you would like to compare.  This works through the entire directory because of the -r option which stand for recursive.  The -q option suppresses the entire output and only outputs the files the differ.

Continue reading Compare Directories and Files with Diff →

Servers, Work

Fix FreeNAS Crash 8.0.1RC2

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We have had an issue with our FreeNAS server kernel panicing when doing multiple large file transfers.  We are running 64-bit machine with 24TB of available space.

First you will need to set the FreeNAS filesystem to writeable so you can make the changes to system files.

mount -o rw /dev/ufs/FreeNASs1a /

Now that your filesystem is writeable you will need to modify the /boot/loader.conf file to include the following.

vm.kmem_size_max="1024M"
vm.kmem_size="1024M"
vfs.zfs.arc_max="100M"

This seems to have fixed the issue with kernel panics for now.