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Latest Posts
- Install newest gcc on CentOS 7
- How to disable IPv6 on CentOS 7
- How to connect a Windows Machine with Ansible via Winrm
- How to Stop/Start Tomcat with Ansible
- Installing Docker and Docker-Compose on CentOS with Ansible
- SSH Login Without Password
- Configure Tomcat as a System Service in CentOS
- How to install Tomcat 11 in CentOS 7/8
- Installing ansible with pip
- Installing python3.9 and pip on CentOS 7
- How to install Oracle Database 23c Developer Edition on Docker
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Monthly Archives: December 2023
Install newest gcc on CentOS 7
Enable repository and install newest gcc with following commands. yum install centos-release-scl yum install devtoolset-9-gcc devtoolset-9-gcc-c++ devtoolset-9-binutils Activate it and check version. scl enable devtoolset-9 bash gcc –version For make activation permanent add “scl enable devtoolset-9 bash” to end of the the /etc/profile file. Ok.That’s it!
How to disable IPv6 on CentOS 7
We will be disabling IPv6 in kernel module. First, check IPv6 is enabled or not ifconfig -a | grep inet6 if you see inet6 in the output, you have IPv6. Let’s disable it. Edit /etc/default/grub file and add ” ipv6.disable=1″ to GRUB_CMDLINE_LINUX GRUB_TIMEOUT=5 GRUB_DISTRIBUTOR=”$(sed ‘s, release .*$,,g’ /etc/system-release)” GRUB_DEFAULT=saved GRUB_DISABLE_SUBMENU=true GRUB_TERMINAL_OUTPUT=”console” GRUB_CMDLINE_LINUX=”crashkernel=auto rd.lvm.lv=centos/root rd.lvm.lv=centos/swap rhgb Read More
How to connect a Windows Machine with Ansible via Winrm
I assume that you have already installed ansible. If not, please check my blog. We have a couple of things to do on both the ansible server site and the remote Windows machine. Let’s start with Windows machine. With most version of Windows, Winrm ships in the box but not turned on by default. There Read More
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Tagged ansible, credentials, disk usage ansible, urllib3, windows management with ansible, windows winrm, winrm
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How to Stop/Start Tomcat with Ansible
, I assume that you have already installed Tomcat, Tomcat System Service, and Ansible. If you have not, please check my blog for instructions. First we need a inventory file. Let’s create /etc/ansible/hosts file copying foloowing lines. You need to use your tomcat sever ip and user information. [tomcat] 192.168.1.160 ansible_connection=ssh ansible_ssh_user=tomcat ansible_ssh_pass=tomcat Now we Read More
Installing Docker and Docker-Compose on CentOS with Ansible
Here is the fresh installation of docker on CentOS. You can change the docker-compose verison to the latest. Just create a yml file with following lines. – name: install docker on fresh server hosts: localhost gather_facts: false tasks: – name: Get some utils installed and repo added shell: yum install -y yum-utils; yum-config-manager –add-repo https://download.docker.com/linux/centos/docker-ce.repo Read More
SSH Login Without Password
You can login to a remote Linux machine without entering a password. First, we need to create public and private keys using ssh-key-gen on the localhost. ssh-keygen Now, we have two files in the .ssh directory “id_rsa” as private key file and “id_rsa.pub” as public key file.
Configure Tomcat as a System Service in CentOS
If you want to start Tomcat automatically when system boots up, you need to configure it as a system service. Let’s create a new file tomcat11.service in /etc/systemd/system [Unit] Description=Apache Tomcat11 After=network.target [Service] Type=forking Environment=”JAVA_HOME=/home/tomcat/jdk-21.0.1″ Environment=”CATALINA_PID=/home/tomcat/apache-tomcat-11.0.0-M14/temp/tomcat.pid” Environment=”CATALINA_HOME=/home/tomcat/apache-tomcat-11.0.0-M14″ Environment=”CATALINA_BASE=/home/tomcat/apache-tomcat-11.0.0-M14″ Environment=”CATALINA_OPTS=-Xms512M -Xmx1024M -server -XX:+UseG1GC” Environment=”JAVA_OPTS=-Djava.awt.headless=true -Djava.security.egd=file:/dev/./urandom” ExecStart=/home/tomcat/apache-tomcat-11.0.0-M14/bin/startup.sh ExecStop=/home/tomcat/apache-tomcat-11.0.0-M14/bin/shutdown.sh User=tomcat Group=tomcat UMask=0007 RestartSec=10 Restart=always [Install] WantedBy=multi-user.target you need Read More
How to install Tomcat 11 in CentOS 7/8
First we need java. Tomcat11 requires Java Development Kit(JDK) 21 or later versions. You can download and install with following link https://www.oracle.com/java/technologies/downloads After the installaton you can check version. java -version Please note that, if you have multiple java installed in your sever. You need to set JAVA_HOME environment parameter to set correct version. Read More
Installing ansible with pip
First, we need to ensure that python3.9 and pip are available. if not available, please read my install pyhon3.9 post below. if so, pip is available proceed installation step but please note that do not install ansible on root user. pip3.9 install ansible Verifying ansible installation. ansible –version As you can see, the Read More
Installing python3.9 and pip on CentOS 7
Firstly, install the requsite packages. sudo yum install gcc openssl-devel bzip2-devel libffi-devel zlib-devel Once that is done, download python3.9 or newer version. wget https://www.python.org/ftp/python/3.9.6/Python-3.9.6.tgz Extract it. tar -xvf Python-3.9.6.tgz Move into the directory and configure with following command.