GNU/Linux – Alex Arriaga

How to get the timezone in Ubuntu Linux?

If you are using a GNU/Linux distribution based on Ubuntu the easiest way to get the timezone is by using following command: timedatectl The output should look similar to this: Local time: Tue 2018-07-24 11:27:00 CDT Universal time: Tue 2018-07-24 16:27:00 UTC RTC time: n/a Time zone: America/Mexico_City (CDT, -0500) Network time on: yes NTP […]

By alex-arriaga
July 25, 2018
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Solving Drupal error: PDOException: SQLSTATE[HY000]: General error: 2006 MySQL server has gone away

The problem After downloading a Drupal project I am working on, and importing its database I got this kind of message related with a PDO Exception: Additional uncaught exception thrown while handling exception. PDOException: SQLSTATE[HY000]: General error: 2006 MySQL server has gone away: SELECT s.lid, t.translation, s.version FROM {locales_source} s LEFT JOIN {locales_target} t ON s.lid = t.lid […]

By alex-arriaga
April 10, 2015
0 Comment

SOLVED: Git remote ref does not exist when trying to delete branches

The problem Today, I was updating an old git repository but when I tried to delete some branches in my local environment and in the remote, I received this kind “remote ref does not exist” And that is because some remote branches didn’t exist anymore. Solution In order to update the references in our local […]

By alex-arriaga
April 10, 2015
1 Comment

Cleaning the DNS cache

Sometimes when we are working with web projects, we have re-configure the DNS for any reason, so after that, it couldn’t be possible to connect to our page, so this is set of commands for trying to clean the DNS cache in your computer (thanks to @xmz). For Yosemite, run this command in Terminal: sudo discoveryutil […]

By alex-arriaga
December 10, 2014
2 Comments

Session 4 – grep command (UNIX and Linux commands, in Spanish)

In my life as a front-end and back-end developer, I am searching for very specific strings in thousands of files and directories, so one of my favorite commands in UNIX and Linux is the grep command. This awesome command is able to find complex strings based on patterns. Watch this video and learn how to […]

By alex-arriaga
June 13, 2014
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Session 3 – mkdir command (UNIX and Linux commands, in Spanish)

How many times do you create directories (folder) in your computer? I know for sure this is one of the most frequent operations in daily work, right? What about if I tell you there is a great command for UNIX and Linux for fast creation of any directory or directories you want! Well, watch this […]

By alex-arriaga
June 13, 2014
0 Comment

Session 2 – chmod command (UNIX and Linux commands, in Spanish)

A very common operation in UNIX-like and Linux operating systems is to set permissions to files and directories, I have seen many people suffering because of these permissions, so today I am going to explain you how to use the chmod command, with this command you will be able to modify any permissions in the […]

By alex-arriaga
June 13, 2014
1 Comment

Session 1 – ls command (UNIX and Linux commands, in Spanish)

This is the first video about UNIX and Linux commands, in this session we are going to learn how to use the ls command which allows us to get a list directories and files. Enjoy and share this video, and remember be happy with your code!

By alex-arriaga
June 13, 2014
1 Comment

How to find blank lines in a set of files in GNU/Linux or UNIX-Like Operating Systems

This short script could help you find blank lines at the beginning or the end of a set of files (in this case in the same directory where you run this script). for f in `find . -type f`; do for t in head tail; do $t -1 $f |egrep ‘^[ ]*$’ >/dev/null && echo […]

By alex-arriaga
July 10, 2013
0 Comment

Alex Arriaga

Tag: GNU/Linux