Brain's Workbench
First, it is recommended to update your system packages to the latest version. You can do it with the following command:
apt-get update -y
After updating all packages, install all the dependencies required for LibreNMS with the following command:
apt-get install rrdtool whois fping imagemagick graphviz mtr-tiny nmap python3-mysqldb snmp snmpd python3-pip python3-memcache mtr-tiny acl unzip git curl wget -y
Once all the dependencies are installed, you can proceed to the next step.
Installing packages
Step 1 » Assign hostname for the server using the below command.
[root@krizna ~]# hostnamectl set-hostname mail.krizna.com
Step 2 » Make a host entry with your IP in /etc/hosts file.
172.27.0.51 mail.krizna.com
Step 3 » Now start installing packages.
[root@krizna ~]# yum -y install postfix dovecot
After package installation continue with postfix configuration.
1. Login to your Zimbra Admin Console using a browser.
2. In the left navigation pane under Home click Configure. Click Certificate.
3. On the right of the Zimbra Admin console click on the settings icon and select Install Certificate.
4. The Certificate Installation Wizard will pop up.
5. Under Server Name Select the Target server you are going to install the certificate for. Click Next
Step 1 – Setup Yum Repository
In the first step install all the required yum repositories in your system used in the remaining tutorial for various installations. You are adding REMI, EPEL, Webtatic & MySQL community server repositories in your system.
CentOS / RHEL 7
yum install epel-release rpm -Uvh http://rpms.famillecollet.com/enterprise/remi-release-7.rpm rpm -Uvh http://repo.mysql.com/mysql-community-release-el7-7.noarch.rpm
Step 2 – Install PHP 7.4
Now install php 7 packages from webtatic rpm repository using following command.
yum --enablerepo=remi-php74 install php
Now install required php modules. Use following command to list available modules in yum repositories.
yum --enablerepo=remi-php74 search php
Now check all listed modules in above command and install required modules like below.
yum --enablerepo=remi-php74 install php-mysql php-xml php-soap php-xmlrpc php-mbstring php-json php-gd php-mcrypt
For additonal php function to install use the command syntax below-
yum --enablerepo=remi-php74 install <your-php-funciton>
This can be easily achieved with yum config file “/etc/yum.conf“. Under main section define the proxy settings like below:
……………… proxy=http://<Proxy-Server-IP-Address>:<Proxy_Port> proxy_username=<Proxy-User-Name> proxy_password=<Proxy-Password> ………………
Save and exit the file and start using the yum command. Sample yum Config file with proxy settings is shown below :
You can use utility httping for that. It sends a HEAD request (by default) to a web server and measures the time it took to get a response.
The utility is available through a number of repositories for different OS’es and Linux distros:
Ubuntu:
sudo apt install httping
Alpine:
sudo apk add httping
macOS with Homebrew:
brew install httping
How to use it:
httping -x 192.68.1.12:1080 -g http://google.com
First aid: check which indices are present:
curl http://localhost:9200/_cat/indices
Then delete the oldest indices (you should not delete all)
curl -XDELETE http://localhost:9200/graylog_1 curl -XDELETE http://localhost:9200/graylog_2 curl -XDELETE http://localhost:9200/graylog_3
Fix: You can then reduce the parameter elasticsearch_max_number_of_indices in /etc/graylog/server/server.conf to a value that fits your disk.
Src: https://stackoverflow.com/questions/39502069/how-to-manually-purge-data-from-graylog-2-1
Step-1: Install LAMP on Debian
I’ve used a bash script to install LAMP. You may find it useful.
#!/bin/bash
########################################################
### This script is created by Hasn T. Emdad Rumi <h.t.emdad@gmail.com>.
### Released under GPL 2.0 licensing
### Date: 12-Aug-2016
########################################################
echo "Updating Debian Repository..."
apt-get install debian-keyring debian-archive-keyring -y
apt-get update
echo "Installing mysql serve & client..."
apt-get install mysql-server mysql-client -y
echo "Installing Apache2 and PHP5..."
apt-get install apache2 php5 libapache2-mod-php5 libapache2-mod-auth-mysql libmysqlclient15-dev php5-mysql php5-mysql php5-curl php5-gd php5-intl php-pear php5-imagick php5-imap php5-mcrypt php5-memcache php5-pspell php5-recode php5-snmp php5-sqlite php5-tidy php5-xmlrpc php5-xsl php-xml pcre php-common curl phpmyadmin -y
echo "Now rebooting services..."
/etc/init.d/apache2 restart
clear
ip_add=`ifconfig | grep -Eo 'inet (addr:)?([0-9]*\.){3}[0-9]*' | grep -Eo '([0-9]*\.){3}[0-9]*' | grep -v '127.0.0.1'`
l1=" _____ _ _ _ _ _ "
l2=" |_ _| | | | | | | | |"
l3=" | | _ __ ___| |_ __ _| | | ___ __| | |"
l4=" | | | '_ \/ __| __/ _ | | |/ _ \/ _ | |"
l5=" _| |_| | | \__ \ || (_| | | | __/ (_| |_|"
l6=" |_____|_| |_|___/\__\__,_|_|_|\___|\__,_(_)"
echo "$l1"
echo "$l2"
echo "$l3"
echo "$l4"
echo "$l5"
echo "$l6"
echo "=============================================="
echo "Phpmyadmin is available at http://$ip_add/phpmyadmin/"
echo "=============================================="
echo "username: root"
echo "password: (mysql root password)"
echo "Update: innodb_file_per_table=1"
Wheezy and jessie both has gone EOL and repos too. archive repo doesn’t seem to usually work either. So here’s a little trick that worked for me. Below is my repo.list file-
deb http://archive.debian.org/debian jessie main deb http://archive.debian.org/debian-archive/debian-security/ jessie updates/ma$ #deb http://security.debian.org/ jessie/updates non-free contrib main #deb http://mirrors.ocf.berkeley.edu/debian/ jessie-updates main contrib non-fr$ deb http://security.debian.org/ jessie/updates main deb http://ftp.fr.debian.org/debian jessie-updates main
Nowupdate apt as below-
On a default installation, your Webmin login page looks like below:
To suppress both the Webmin logo and the “Webmin” text from the login page, add below to
Webmin > Webmin Configuration > Webmin Themes > Theme Extensions: