devops

JSON Basics

2022-04-26 · 1 min read · json ·

JSON or JavaScript Object Notation is a data representation standard shown in a key:value pair, just like a traditional JavaScript object. Here's the key info you need to know about it: All the data in the file must be surrounded by curly braces if you're representing it as an object, and in square brackets if it is …

Git Latest Hash

2022-03-27 · 1 min read · git ·

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Sometimes, for automation purposes, you would like to get the latest commit in a working copy. Below is how you do it. 1~$ git rev-parse --short HEAD Remove the --short HEAD if you need the longer version.

Remove Large Files Committed in Git

2021-03-21 · 3 min read · git filter-branch ·

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It's quite annoying when you committed large files to git specially if it's something that's something confidential. We'll relatively easy to do that. Just use the 'filter-branch' command in git as follows: 1git filter-branch --force --index-filter \ 2> 'git rm --cached --ignore-unmatch …

Pull Request via Github API

2020-09-08 · 1 min read · git github pull-request github-api ·

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From the example in https://docs.github.com/en/rest/reference/pulls#create-a-pull-request, it seems quite easy: 1curl \ 2-X POST \ 3-H "Accept: application/vnd.github.v3+json" \ 4https://api.github.com/repos/octocat/hello-world/pulls \ 5-d …

Add Linux Swap File

2020-07-12 · 1 min read · swap ·

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1sudo dd if=/dev/zero of=/mnt/file.swap bs=1M count=512 2sudo mkswap /mnt/file.swap 3sudo chmod 0600 /mnt/file.swap 4sudo swapon /mnt/file.swap 5echo "/mnt/file.swap none swap sw 0 0" >> /etc/fstab See details in https://www.garron.me/en/linux/increase-swap-memory-linux.html

Removing Group Sticky Bit

2020-07-12 · 1 min read · permission sticky-bit ·

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1chmod g-s <dirname_here> More details in https://serverfault.com/questions/238962/how-do-i-clear-the-s-permission-on-a-directory-in-linux

Security Updates on CentOS

2020-07-12 · 1 min read · centos security updates ·

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Is best done manually: 1sudo yum -y update --security 1The problem is that CentOS does not supply the necessary metadata in its yum repositories such that yum-plugin-security can function. In other words, yum-plugin-security does nothing, and the automation of security updates is a lost cause in CentOS. In fact, the …

Upgrade php 5.4 to php 5.6 in CentOS

2020-07-12 · 1 min read · centos upgrade ·

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NOTE: php5.4 and php5.6 is no longer supported. https://www.mojowill.com/geek/howto-install-php-5-4-5-5-or-5-6-on-centos-6-and-centos-7/

Upgrade php 5.6 to php 7.0 in CentOS7

2020-07-12 · 1 min read · centos upgrade ·

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NOTE: php5.6 and php7.0 is no longer supported. 1wget https://dl.fedoraproject.org/pub/epel/epel-release-latest-7.noarch.rpm 2wget http://rpms.remirepo.net/enterprise/remi-release-7.rpm 3rpm -Uvh remi-release-7.rpm epel-release-latest-7.noarch.rpm Then, enable "remi-php70" in /etc/yum.repos.d/remi-php70.repo …