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#!/bin/sh

#Check the Drive Space Used by Cached Files
du -sh /var/cache/apt/archives

#Clean all the log file
#for logs in `find /var/log -type f`;  do > $logs; done

logs=`find /var/log -type f`
for i in $logs

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Converting MS Office files to PDF

(Description of the different solutions / alternatives)

1. Microsoft Windows based solutions

1.1 Microsoft Graph API (Office 365)

This is the current, official, Microsoft endorsed/supported solution ("cloud based")
(2017 - present)

1. The user uploads their MS Office document (source.doc in our example snippet bellow) to their Microsoft OneDrive
2. The user then uses the Microsoft Graph REST API to send a HTTP GET Request to the Convert content endpoint:

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from https://stackoverflow.com/questions/39609189/how-to-list-images-in-docker-registry-being-on-registry-server

The docker CLI doesn't have functionality to search a registry, but you can use the registry's REST API. Assuming you're using the registry:2 image, then you can list all the repositories using the catalog endpoint:

$ curl https://my-registry:5000/v2/_catalog
{"repositories":["busybox","redis","ubuntu"]}

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Adjusting child processes for PHP-FPM (Nginx)

When setting these options consider the following:

• How long is your average request?
• What is the maximum number of simultaneous visitors the site(s) get?
• How much memory on average does each child process consume?

Determine if the max_children limit has been reached.

• sudo grep max_children /var/log/php?.?-fpm.log.1 /var/log/php?.?-fpm.log

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Codeigniter 3 server configuration for Nginx & Apache

Web Server Site Configuration

Recommended Apache Configuration

Use the following configuration in Apache's httpd.conf file or within a virtual host configuration. Note that you should set DocumentRoot and ServerName fit to your environment:

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Custom format for displaying bytes as kb, mb, gb or tb.

Response to a few places on the internet: https://productforums.google.com/forum/#!topic/docs/x_T_N-yRUYg And here: https://stackoverflow.com/questions/1533811/how-can-i-format-bytes-a-cell-in-excel-as-kb-mb-gb-etc

Here is one that I have been using:

[<1000000]0.00," KB";[<1000000000]0.00,," MB";0.00,,," GB"

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local 192.168.2.0 # SWAP THIS NUMBER WITH YOUR RASPBERRY PI IP ADDRESS
dev tun 
proto udp #Some people prefer to use tcp. Don't change it if you don't know.
port 1194 
ca /etc/openvpn/easy-rsa/keys/ca.crt 
cert /etc/openvpn/easy-rsa/keys/Server.crt # SWAP WITH YOUR CRT NAME
key /etc/openvpn/easy-rsa/keys/Server.key # SWAP WITH YOUR KEY NAME
dh /etc/openvpn/easy-rsa/keys/dh1024.pem # If you changed to 2048, change that here!
server 10.8.0.0 255.255.255.0 
# server and remote endpoints 

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Office Web Apps Viewer

('.ppt' '.pptx' '.doc', '.docx', '.xls', '.xlsx')

http://view.officeapps.live.com/op/view.aspx?src=[OFFICE_FILE_URL]

<iframe src='https://view.officeapps.live.com/op/embed.aspx?src=[OFFICE_FILE_URL]' width='px' height='px' frameborder='0'>
</iframe>

OneDrive Embed Links

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Create a Software RAID 1 setup for your 2-disk server on Ubuntu Server 20.04

Let's start with the basics: the official guide by Ubuntu (https://ubuntu.com/server/docs/installation-advanced) is outdated/wrong.

Now on to the solution:

• Select "Custom storage layout" when you reach the storage step of the installer
• If the disks have existing partitions, click on each disk under AVAILABLE DEVICES and then select REFORMAT. This will (temporarily) wipe out the partitions.
• Now select the 1st disk to add as "boot" disk (same menu that had REFORMAT in).
• Do the same with the 2nd disk.

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Install ghostscript from yout terminal : sudo apt install ghostscript, then create file, for example pdf2gray.sh and copy paste the script bellow. Add execution access using chmod +x pdf2gray.sh

#!/bin/bash

gs \
 -sOutputFile=$2 \
 -sDEVICE=pdfwrite \
 -sColorConversionStrategy=Gray \
 -dProcessColorModel=/DeviceGray \
 -dCompatibilityLevel=1.4 \