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How to force specific language in Jenkins
Ignore the browser’s language preference and set the specific language in Jenkins. At first, install the locale plugin. Open Manage Jenkins, then Configure System to set the default language.
View ArticleHow to display Java settings
Use a dedicated option to display Java settings. Display settings Display the system configuration. $ java -XshowSettings:system -version Operating System Metrics: Provider: cgroupv1 Effective CPU...
View ArticleHow to display ansible configuration settings that have changed from the default
Display Ansible configuration settings that have changed from the default. Display Ansible configuration file. $ ansible-config view -vv ansible-config 2.9.6 config file =...
View ArticleHow to restart service on every configuration change
Monitor file system events to restart service on every configuration change. I will use varnish service and wait for changes to the /etc/varnish/default.vcl configuration file before initiating restart...
View ArticleHow to combine group variables by parsing group configuration files
Group variables are overwritten, not merged, this is an expected behaviour, but can by circumvented by parsing group configuration files. Ansible directory tree used to describe this solution. $ tree...
View ArticleHow to create site-to-site connection using IPsec
Use the native IPsec stack to connect multiple networks over the internet. I will connect three different networks over the internet using IPsec tunnels. HostnameIP...
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How to define build name and description in Jenkins
Define build name and description in Jenkins pipeline. Use currentBuild.displayName and currentBuild.description to define build name and description. pipeline { agent any options {...
View ArticleHow to combine group variables with specific names
I have alreade described how to combine group variables by parsing group configuration files, so today I will describe how to combine group variables with specific names. Ansible directory tree used to...
View ArticleHow to define JAVA_HOME
Determine and set JAVA_HOME to execute Java command-line applications. Determine JAVA_HOME using java binary location. $ readlink -f $(which java) | sed s:bin/java::...
View ArticleHow to trace terraform execution
Use specific environment variables to enable and store detailed terraform execution logs. Define TF_LOG environment variable to TRACE terraform execution. Use DEBUG, INFO, WARN, or ERROR values to...
View ArticleHow to display strace summary
I have already described how to strace PHP-FPM processes, but you can also display a strace summary to get detailed information about count time, calls, and errors for each syscall. Prerequisites...
View ArticleHow to lock specified packages from being updated
Use versionlock plugin to protect packages from being updated on the CentOS operating system. Install Yum versionlock plugin. $ sudo yum install yum-plugin-versionlock List locked packages. $ sudo yum...
View ArticleHow to check the HashiCorp software version
Use Checkpoint service to check the HashiCorp software version. Current version check Check the current Vagrant version. $ curl --silent "https://checkpoint-api.hashicorp.com/v1/check/vagrant" | jq...
View ArticleHow to use templates inside shell scripts
Use templates inside shell scripts by substituting environment variables. I will use envsubst utility, which is a part of the gettext-base package. Create a template file Create a template using...
View ArticleHow do display physical volumes associated with the volume group
Display physical volumes associated with the volume group. Display physical volumes. $ pvdisplay --columns --noheadings --options pv_name | tr -d ' ' /dev/sdb /dev/sdc /dev/sdd /dev/sde /dev/sdf...
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How to install Nexus Repository Manager 3
Install Nexus Repository Manager (NXRM) 3. Prerequisites Install required packages. $ sudo apt-get install curl gnupg apt-transport-https Install Java Import AdoptOpenJDK GPG public key using curl. $...
View ArticleHow to create the simplest possible nftables firewall
Create the simplest possible firewall using nftables framework with relaxed rules that will allow all outgoing traffic, incoming ICMP echo requests, and ssh connections. Default configuration Default...
View ArticleHow to fix device excluded by a filter
Fix “device excluded by a filter” LVM error. Sometimes you can encounter “device excluded by a filter” LVM error. $ sudo pvcreate /dev/sdb Device /dev/sdb excluded by a filter. This error is caused by...
View ArticleHow to edit file in-place
Use sponge utility to read standard input and safely write it out to the same file. Prerequisites Install moreutils package to use sponge utility. $ sudo apt install moreutils Case #1 Inspect fstab...
View ArticleHow to manage systemd services remotely
Manage systemd services remotely over SSH protocol. Create user for systemd manager Create systemd-manager user on remote machine. $ sudo useradd --create-home systemd-manager Prepare the directory and...
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