I was watching a video last night that had good content but before it was done the looping background music caused me to stop it. Half the comments were a complaint about the music too. So it wasn't just me. I'm not saying background music is always bad, but it is not easy to get it right.

'Hello my name is XXXX XXXX welcome to my channel. Today I'm going to show you show to XXXX. I hope you like the video. If you do, click the Like and Subscribe button. Well, enough talk, lets dive into it!! *** 10 secs of intro music *** Do you also have the problem that XXXX? Sometimes you think XXXX and you dont know what to do? There is a way out of this problem! *** Actual video content *** More or less like that, every damn youtube video.

Amen!

This right here is very underrated. Assholes forcing 10 minute videos for ads and just fills them with useless thoughts no one wants to hear or care about.

You guys must be fun at parties :P

Most of the "x things you didn't know" videos are shit. Regarding Linux, I know that there way waaaaay more things than 8-9, that I know, so it's safe to check it out. I ended up knowing 1.

I use most of those daily. I must be a super hero then...

@@dingdong2103 Lol...sure, whatever makes you feel good about yourself!

gem

Thanks for the kind words, glad I was able to provide some inspiration :)

tobortine same here

and here...

Same here.

I do alot of linux. I am certified in linix and even these commands escaped me. The one that will be most likely used the most would be sudo !!

and disown that command with an added sleep so the chaos begins an hour after you leave the laptop

You could use awk and create the folders plus put a locked file in each one. :)

A crontab that runs every second? How does that work?

@@DaVince21 */1 * * * * ( /get/fucked/noob.sh) */1 * * * * ( sleep 1 ; /get/fucked/noob.sh) */1 * * * * ( sleep 2 ; /get/fucked/noob.sh) */1 * * * * ( sleep 3 ; /get/fucked/noob.sh) */1 * * * * ( sleep 59 ; /get/fucked/noob.sh) sure you'd be executing 60 jobs every minute, but hey it's not your pc :)

After seeing all these comments Satan: Just wanna say, huge fan.

I guess he did it in no time!

better even, tmux

when you know before that you'll be gone until it finishes - yes. But normally you don't work *always* in screen and friends - then disown is perfect when boss wants unscheduled meeting right now and you need your laptop in the meeting room, i.e. disconnect - but that build is running, having spawned subprocesses ....

@@armynyus9123 unreliable connections, not unreliable bosses :)

@@farazsaidan you can upgrade to byobu

I use tmux on commonly used systems, but there have been times where I touch systems I don't own/maintain and I think this command could be useful (just found out about it).

I have been using Linux for about 5 years and I know most of them, what have you been using Linux for? :)

@@sysstemlord There was no KZfaq or even web sites when I started to show you tips. 🤷

I wanted to give the same comment. Tmux is very useful.

lol

​@@james_gemma​ Is that a command to make a man bash something?

feminist flavor of *nix

@@MrFace Feminist only use SystemVag or SystemV for short. Others use SystemDick or SystemD

man mount... If you're into that sort of thing 😁

bro how it works for arch?

@@patrickFREE. The same thing why? And this is. Bash variable you may used zsh in arch

I was looking for this comment. I got an error saying, "emacs: command not found", and assumed there was a default editor set. (I'm a vi user). $ EDITOR=vim did the trick.

exact same for me

Bang батя в здании

HOLD FAST he shot me down, sudo bang bang - my terminal shot me - down. 😂

Bad system call

I was Linux, he a -nix We root systems made of X He wore Spark, and I wore ARM He would always win the stack Bang bang I shut him down Bang bang He bit the Grub Bang bang Systemd shut us down

sudo gang bang. Oops I made a typo

Video ends at 8:37 Fuck me later

Hahaha

HA

this is very helpful... i will thank you right away

Kai West don’t thank me but my video starts at 0:31 and the previous video ends at 0:00, leaving 0:30 for a commercial.

True 👏🏼👏🏼👏🏼

Does it just run the previous line with whatever is typed before !! ?

Also saves in bash history in expanded form so when you use the up arrow for recent commands it doesn’t say “Sudo !!” like you actually typed it it shows the whole effective command.

@@cartersherman925 !! just basically replaces itself with previous command. Example if you typed ls as first command, then you can do the following: sudo !! -al to do sudo ls -al

!-1 !-2

If you want to not show your ascii art in the history, vi :sh

Thanks for that! You shouldn't rely on the "leading space" method tho, if you want to guarantee commands don't make it into history you can always ' unset HISTFILE '

[YT Comment Linter v3.4] ERROR 23, Line #6: Too many colons. [YT Comment Linter v3.4] WARN 12, Line #6: Too much gibberish.

Just edit the comment, dude!

Give it up : )

I use Byobu. Makes maintaining my servers a dream.

Ramdisks can be useful in some (but not very frequent) workflows. Example: ETL Extract Transform Load. Extract to Ramdisk, do whatever you must do, load from ramdisk. If the transformation part is long you'll start loving Ramdisks .

When I did some data manipulation for deep learning, I had to transform my data set into something more sensible to be used for training, did a small python script for it, but due to the amount of data, it took a few minutes to run, this could have helped me reduce the time by a lot.. I could also have reduced the complexity of the script but not without a few hours of work, so not worth it

screen is very useful. It is also what I would probably use to perform multiple tasks or time-consuming tasks on a remote machine.

Lawrence D’Oliveiro I don’t use it a lot since I don’t work that much with remote machines and I got I3... I know there are some other features that screen has but i3 doesn’t but I still prefer using i3 over screen for tiling terminals...

you lost me. does the folder /dev/shm automatically run on ram or something?

@@MichaelMantion Yes. SHM stands for SHared Memory. www.cyberciti.biz/tips/what-is-devshm-and-its-practical-usage.html THO! Unlike on that page, i don't think you need to mount it specifically, i cannot recall ever doing that.

@@MichaelMantion Checked, Ubuntu based distros auto mount it by default, but i recall years ago using on Debian we didn't even mount it and it was available as it is a device. Might be that the mounting thing is more of convenience type of thing (easy clearing and assurance to end user)

@@skaltura kernel configurable. You're eating your system semiconductor ram to use it, so if you're on a low memory system compared to useage needs - you might consider a disk based option ...

This is true for linux, but what abut Solaris, or HP(s)UX (do hey still exist) or any of the other unixen out there? Do the embedded unixen all have /dev/shm? It's worth understanding what's going on. Besides I believe the /dev/shm is often just the result of an fstab entry, so it's really just the same thing as what the presenter said.

Welcome! Glad you enjoyed the video!

I add this alias to my bashrc alias pls='sudo $(fc -ln -1)' Then when I need to re-run a command as root I just need to ask nicely ;)

Yeah, Thats Korn Shell syntax, adapted by Bash. I Think the variable LINENO -eq the number of last command executed.

In Linux sure. On other unixen too? Anyhow, I'm also wary that I will fill up /dev/shm and forget, thus causing the machine to start to thrash. SSD are a better answer -- and not that expensive.

Cool, that's a good one, thanks!

Jesus thank you.

Ah, Vim :-). Attempting to understand your example: User finds ':w' won't work. Permission denied. Instead pipe all the editor's content into 'sudo tee %' (the '!' executes a shell command). That will overwrite the currently open file since '%' in that command line context will be replaced by the current file name. At least this feels sensible.

People who use _real_ editors tend to be _real_ arrogant jackasses.

@@kevinbillingsley8256 , vim has a certain learning curve. Once a certain point is passed it proves to become quite the swiss army knife and very versatile. Myself, I am using it for about 20 years now virtually every day at work, am happy, and sometimes enjoying the text-adventure that also is vim. Recommend vim to fellow nerds (e.g., people watching videos like this one). Just do not badger the non-IT people and you are socially fine. Btw. nothing against nano. IMHO any Linux fanboy ought to bring nano basics if only for the fact that it seems to replace vim as the default onboard command line editor. Meaning, a fresh Linux will probably already have nano available where vim still would need being installed.

Zapy i recommend you tmux or screen or byobu... to rule them all

yeah, This is the most useful command I learned by watching this video.

It it then necessary to share the rest of the useful commands: - suspend the current process (I use this to suspend Vim to run tests in the same window): ctrl+z - list processes: jobs - foreground one of the options listed in jobs: % - foreground the most recently suspended process: fg EDIT: 12/23/18 - change background to suspend

you can also put a & at the end of the line to place the command in the background and not use ctrl Z ie sleep 120 &

@@wulymammoth You don't :put it in the background", you suspend it with Ctrl+Z. To put it in the background, that's what bg is for.

@@SeverityOne you're right! Gotta use bg for that. corrected :)

I agree. I tried it on Centos7 and it didn't work.

try HISTCONTROL="ignorespace" and then a command with a space

I tried it on Mint 19 without changing any settings and it works

there is a specific word that needs to be added to your .bashrc only then it would work ---- never by default.

@@KanishkkaKeshav I've found it - HISTCONTROL=ignoreboth. However, it was this way by default.

maybe it was nodes, like server nodes :DD not nudes :DDD

Thank you! So many commenters here need to learn how to use their keyboard first, apparently. It's also safer because you always know what you're running as root instead "what ever the last thing I said because there are no consequences to my commands." Might as well use "sudo -s".

You have to strike 7 keys, sudo!! Only 6 :-P

except my laptop doesn't have a dedicated home key so i have to do a FN home.. Easier to just do sudo !!.

@SaltyBrains Using Putty (Windows), when I CTRL+A I get ^A. When I try the home key, it capitalizes the previous character. This is using the bash shell in Fedora 27. sudo !! works without dealing with this crap and I'm not a fish -- I can remember the last command I just typed.

@SaltyBrains get on that tmux game and embrace ctrl+b

Most, if not all of the commands will work on Mac OSX because it uses the same shells that you can run on Linux. It‘s bash by default.

!! is a bash operator. I believe bash is the default shell on macos.

@@flanadu It is, it's just that I didn't find out about these commands before, and some commands require installing packages on macOS using brew, which is why things like this surprise me since I didn't need to install anything beforehand. I've changed my default shell to zsh, no difference in commands whatsoever, I just like the sub string search functionality :)

@@handsomepixel5193 I also use zsh as my shell on both macos and linux. You should checkout oh-my-zsh if you're a zsh fan. github.com/robbyrussell/oh-my-zsh

@@flanadu I've used oh-my-zsh before, but it was too much "zsh power" for me too handle. The plugins were nice, but I wanted a simpler and faster setup, so I instead downloaded the individual plugins myself and auto-source them through my .zshrc I use zsh-syntax-highlighting and zsh-async-git-prompt, and I consider that enough for now.

Balazs Rau there’s a bash variable called HISTIGNORE that has to be set properly for that trick to work.

This is correct. if you did blah and then did mkdir !! it would give you mkdir blah, it works with any text

cd - is one of my favorites. followed closely by reverse search ctrl + r

@@seanshuping rm basename and rm dirname destroyed my distro... i want to replace with zenity xdg-open.

Yes, I too like tmux.

Oh yeah, love tab when typing long file names or can’t remember how to spell something. Works at a CMD prompt on that other OS that should not be named. Lol. Slightly different though, sequences through all files that match. Use tab in vi on command line as well to fill out a file name.

@@johnwythe1409 right!? Oh and the other OS’s name is Linux’s challenged stepbrother 😂

@@Uneke I meant love it on Linux. Just happened to note what it does under the cmd prompt. I thought since this seems to be a Linux video, I thought I would make a joke vis a vie Voldemort/ Windows.

It is not -p, it is the curly braces wildcard/expansion/comprehension thing, i think.

@@AlexanderBukh Yes. The -p makes the parent directory structures needed if they don't exist... the curly brace stuff was the number magic work ;)

@@AlexanderBukh -- The braces use recursion to create multiple folders (first brace are the parents, next brace is the child folders to be created in the parents, etc...). The -p creates parent folders if they don't exist. mkdir -p not_a_folder/not_a_subfolder/another_not_a_folder will create all three where if you don't include the -p it will fail because not_a_folder doesn't exist.

@@AlexanderBukh dude I meant.... That command

Damn furries everywhere

​@@rosangelaserra4552 In hindsight, perhaps I should have phrased that differently. 🙂

Either it's an in-joke for the "useless use of cat" crowd, or maybe it's because it's just a demonstration you silly pedant. 🐱

The entire command is weird ... why would someone TEE a static file ? Either something other is going on, or it is a very bad example

@@monday6740 the static input seems like an example to me, guess examples are fine. Personally I find | cat > /dev/null much worse. 😱

The security nazis are just protecting the company from users like you.

And evidently not quite well enough.

@@TechnoTinker Well that depends on how how you look at it. At a recent job, I created a virtual P2P link over ssh from my home to my desktop at work, so that I would have normal network access to work, so long as I initiated the connection from my home. Since I used ssh(1) with the key they provided, it was technically legal even though it wasn't quite what they expected. It let me get a lot more done because I had certain network-based facilities (like new-email notifications) working for me when I was home and I could check on servers and what not all using the normal commands. I think our security guys must have noticed it, but they didn't mind because, to repeat one last time, the transport was ssh(1).