DevOps tools
Tools in release:
Jenkins: Jenkins official website, Jenkins Tutorial, Jenkins Docker container
Travis: Trivis official documents
TeamCity: TeamCity official website
Using AWK
~~~shell
//print the first column
Linux Job Interview Questions
- How can you see which kernel version a system is currently running?
How to block IPs on Windows Server 2012
Open Windows Firewall with Advanced Security
Rename a computer name in a domain and run into exists error
Rename a computer name as old computer name in a domain. There is an error “The account already exists”. Check the following records to make sure there is no record of the old computer name.
Open range ports via ufw or iptables
For UFW
SMTP setting for Drupal, Django, and WordPress
Drupal, Django, and WordPress are using localhost as SMTP server by default. But there is a way to use another SMTP server to send email.
Correct way to move kvm vm
I have a problem to do live migration between two host computers via virt manager. It is a permission issue but I don’t have time to fig it out. It is not a big deal. It is ok to move KVM vms offline.
MariaDB/Mysql Timezone
By default, mysql timezone value is system. It causes Python application error. After changed timezone to UTC, problem is solved.
Using docker and zfs to create limited size mysql database
Idea: Docker is run mysql server. Mysql data is stored on zfs volume and set the quota by zfs utility. Assume zpool name is zpool-mysql and mount point is /mysqldata