Bash Scripting for Beginners: Complete Guide to Getting Started - Universal Update Script (Part 8)

The word "Universal" can refer to good or a bad thing. Universal is working on another Jurassic Park sequel? Probably a bad thing. A universal script to help you consolidate tasks on the Linux commandline? Definitely a GOOD thing! In this video, you'll see an example of creating a "universal update script" to help you deal with using multiple distributions.

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*⏰ TIME CODES*
00:00 - Pre-Intro
00:48 - Intro
01:23 - Explanation of the "Universal Update Script"
08:06 - Using the /etc/os-release file to our advantage in a Bash Script

*OTHER BASH SCRIPTING SERIES EPISODES*

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#commandline #bash #terminal

[ericablack]

You are a very good teacher !
I like the way you explain
You are awesome
Thank you
I will recommend your channel in Moldova

[Mugen_FB]

Before watching this video, I created my own update and upgrade bash script when I started watching your channel. I never used the directory path to update a particular application, so now I will start doing some experiments. Thank you again for another great video!!!!

[jojobobbubble]

I've been wanting to make a script for auto update for awhile. This is a huge step in the direction I want to go with my script. Trying to find a way to have it auto reboot if the upgrade command actually upgrades

[damianpodgorski]

It was really fun for me, I also added a line for CentOS as I am running this OS on my virtual machine with RPM package

[MiBaLinuxTech]

You give me great inspiration for my work. Many thanks.

[zeppelinmexicano]

Semi useful is a necessary step for newbies. Several intrinsic "tricks" of the trade in that script, things to own on the automatic level.

[ChristopherJamesCalo]

instead of checking for "Arch", "Ubuntu", etc, why not just check for the existence of the update commands "pacman", "apt", etc? 🤔

[BLT]

Just curious, when you ran the grep -q “Ubuntu” your U was capitalized, but is evident that in the ID_LIKE section of the /etc/os-release file it’s there but lowercase. Had you searched for “ubuntu” instead of “Ubuntu” I believe it may have run the way it was intended. If I’m not mistaken? 8:48

[younesstouzani]

Men the word thanks it's not enough for you <3 👌

[jnaslarssn]

Great tutorial serie on bash! I have some questions. Wouldn't changing "Debian" to lower case "debian" grep all in os-release file on any system downstream from Debian (i.e Ubuntu, Mint, PopOS etc )work grepping from the ID_LIKE row, thus all deb-depending systems/OS'?
I added below to the script but with the first method, I couldn't find what to grep saying flatpak is/isn't installed (maybe you'll come to that later on).

If anyone is interested...
# If flatpak is installed on this system this should update flatpak apps
# add this variable on top:
if [ -d $extra_repos ]
then
# Additional repositories using flatpak
echo "Flatpak installed on system"
flatpak update
fi

[RECURSIVE_MEMORY_LOGIC]

Do all distribution /etc/os-release files consistently contain the parameter ID_LIKE as operating system identifier?
I am using Zorin OS, and the os-release file contains:
ID=zorin
ID_LIKE=ubuntu

[GrindAlchemyTech]

Why does a script fail even if the example is followed to the detail... for instance a basic ldd lookup & grab dependencies script for bash in Context of creating a chroot environment

[pepe-perez]

you can write this line like this:
if grep -q "Pop\|Ubuntu" $release_file
etc...

[markjones]

Would which apt, which pacman, which dnf work as a test case?

[brojam]

I have tried to write the following simple script:

#!/bin/bash

echo "What is your favorite color?"
read color

select_color () {
echo "What is your favorite color?"
read color
}

x=1


while [ $x -lt 10 ]
do
if [ "$color" = "red" ]
then

echo "Nice

x=20

elif [ "$color" \= "red" ]
then
echo "Pick another
select_color

fi
done


I cannot get it to run on my linux. I intentionally pick a color other than red, but tt stops at the while loop but never runs the procedure on how to pick another color. I also tried red and same thing, it does not tell me nice one. Could you show me where I am going wrong?

Thanks

[robinedminson]

Great series but I ran into a snag with this one. I'm running Raspian Bookworm where ID_LIKE=debian - all lower case. Found that grep -iq "Debian" ran the script correctly

[jackelofnar]

I may be missing something but why wouldn't you use if else or case statement? Say your on a Arch system the following if statements will be executed witch is wasting resources.

[LearnerHarshalRajeshJain]

Note it doesnt ignore 1st line #!/bin/bash rest treated as comment who start with #

[fictitiousnightmares]

9:58 It should work fine if you didn't capitalize the U in Ubuntu right? Since the word ubuntu IS in the os-release for your system. 15:09 That wouldn't have fixed it either since you have a capital D in Debian. By changing it to Pop you are just cheating as far as I'm concerned. :P

[Kwazzaaap]

Keeping everything up to date is not as fun when nvidia ships a driver that segfaults your desktop