Linux moving or deleting large files getting Argument List Too Long

When you try to move or delete a lot of files in linux cli and getting Argument List Too Long, you can try to filter it by
find . -type f -name "*.xml" | xargs -i mv {}

Mysql Export and Import from select statement

To export into a csv file from a select statement in mysql, the command is

SELECT * INTO OUTFILE 'data.txt'
FIELDS TERMINATED BY ','
FROM table2;

To read the comma-delimited file back in, the correct statement would be:

LOAD DATA INFILE 'data.txt' INTO TABLE table2
FIELDS TERMINATED BY ',';

Moodle sort courses by name did not work

When you try to sort courses in Moodle and the order is not really working, it means that your sortorder has reach the max number.

To fix it, simply go to the mysql and apply this command to the database
mysql> UPDATE mdl_course SET sortorder = 1000;

This will reset all courses sortorder and simply run it again to resort your courses.

Moodle backup error with fatal memory issue

To avoid this memory issue, increase the memory site on the config.php
Add this line
$CFG->extramemorylimit = '4096M';

Log out from the moodle and close the browser. Then open the page again and log in.
If you still run into the issue, increase the memory limit to bigger value. Once you are done, be sure to remove the line.

Import csv into mysql direct

load data local infile 'uniq.csv' into table tblUniq
fields terminated by ','
enclosed by '"'
lines terminated by '\n'
(uniqName, uniqCity, uniqComments)

How to use screen in cli

To start a new screen session, simply type the word "screen" and hit enter. It is preferred that you name your screen session, by instead using "screen -t name".

To "detach" from a screen session, type "Control+A", then "D".

To terminate a screen session, type "exit" and hit enter.

To list currently running screen sessions, type "screen -ls" and hit enter.

To "reattach" a screen session, type "screen -r [name of socket]" and hit enter.
"[name of socket]" is one of the sockets listed from the "screen -ls" command.

To scroll back through console output within a screen session: ctrl-a (release) then type [ Use the up and down arrows. To escape this mode (copy mode) hit esc

Showing tables only in mysql

To show only tables and dump to a txt, use the command
# mysqlshow database_name > export.txt