My 5 Favorite Linux Shell Tricks for SPEEEEEED (and efficiency)
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- Опубліковано 2 чер 2018
- My favorite tricks for becoming a Linux Shell Speed Demon (this assumes Bash/readline)
1:04 - sudo !! - re-run previous command with 'sudo' prepended
1:53 - ctrl-k, ctrl-u, ctrl-w, ctrl-y - cutting and pasting text in the command line
3:24 - practical kill/yank example
4:04 - use 'less +F' to view logfiles, instead of 'tail' (ctrl-c, shift-f, q to quit)
6:25 - ctrl-x-e - continue editing your current shell line in a text editor (uses $EDITOR)
7:54 - alt-. - paste previous command's argument (useful for running multiple commands on the same resource)
9:18 - reset - resets/unborks your terminal
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~~~ Timestamps to specific sections are in the description! ~~~
ctrl+a and ctrl +e goes to the start and last, I find myself using this most
Thanks for tips! Few more useful commands. The easiest way to create empty file is typing >filename
I also often need to convert unix timestamp to hooman readable form, "date --date=@your_date_in_unix_format" does the job.
i literally screamed when i learned the kill / yank
Becoming proficient in emacs makes the editing commands second nature. 🙂
@@planktonfun1 but why? your keyboard also doesn't have home and end keys? much easier than some ctrl combinations.
> Bang bang
> password shot me down
> Sudo .. BANG BANG
"Torvald Sinatra"
BANG BANG rather reminds me of "Rammstein - Feuer Frei"
@@karlheinzneugebauer hey thanks thats a great way to remember that!
Nancy Sinatra :) ?
@@hayksk Had to google who that is. Appears to be the daughter of Frank. Interesting.
@@karlheinzneugebauer Yes, she is.
i really love the fact that you wrote exactly what you are going to explain in the description with timestamps!
Yeh, same, I was prompted to subscribe as my patience run out not because I should definitely learn the rest of the content but because,"ADHD," 🤣, prompted straight to subbing and turning notification on, lamo.
"Alt + backspace" is more useful than "ctrl + w" in my oppinion. While the latter only stops at whitespaces, the former also stops at special characters, e.g. slashes, so you can edit your way to parent directories much faster.
Solid advice! Will try to re-wire my brain to try it out.
Both are useful but for different cases. Clear entire arg or go word by word. Personally I use both depending on the case.
I use a Mac terminal and there is no Alt key, but ^w works just fine enough for me
@@richardcampbell2438 On the Mac I think you need to use Escape instead of Alt
@@richardcampbell2438 dump Ur mac if ur using Linux !
Actually anything is fine ...depends on the person !!!
Instead of you can also just use !$ the same way you used !! in the first tip. There's actually a lot of notation for this which is terminal agnostic and supported in zsh as well as bash and probably others. For instance !-2 gives you the command before last, !-3 the one before that etc. $ on the end gives you the last argument of that command. !^ gives you the first argument, !:2 or !* gives the second argument. All of these things can be combined too, for instance !-3:2-$, which gives the second to last argument of the third-last command or !-3:2-3 which gives the second and third arguments to the third last command. Hard to keep straight at first but a very powerful way of getting around once you jam it into your head.
i could definitely have a beer with this guy.
Yeah, he seems like a cool guy
I've been programming professionally for 40 years, most of that in the Linux world, and it's amazing the learning process never ends.
Yeah, I’ve used less a ton but not with other flags. I tried less +F but didn’t work.
Do you still love programming ?
@@allen_joji Yeah, I do. I'll eventually retire, but it's unlikely I'll ever stop programming. I'll do my own projects is all.
My opinion about careers: you should find something you can be passionate about, that you want to do even if you weren't being paid. We spent far too much of our lives at our jobs, and do you want it to be soul-sucking?
The last people I want to work with: the ones who see it as a job. They're only there for the paycheck. Yeah, if I won the lottery, I'd quit the day job. But I'd still program. I'd just get to pick what I work on.
you had me at `sudo !! `
shaking my head at the amount of time i've wasted not knowing about this...
VERY useful tips here, I plan to start using them regularly. You’re proving to be my most useful resource on YT in my Linux journey. Also enjoying your sysadmin series.
Sudo!!
I hit the ground
Sudo!!
That awful sound
Sudo!!
My baby shot me down
11 minutes later and I don't know how I survived without these tricks for so long. Great stuff man
Huge Thanks for the 2 shell videos you've made. Been using CLI over a decade but did not know any of these tricks and have always found it slow and clunky when compared to the gui. Well no more, not after these massive quality of life improvements... Been 6 months since I watched these videos but I still think of you and smile the endless times a day I use these tricks!
Another nice trick worth mentioning is reverse search (Ctrl + r), where you can type a part of your command and it'll bring on the last command entered with the expression in it. You can see older/newer commands by pressing Ctrl+r and Ctrl+R respectively.
It's a bit more common so maybe not really a trick, but still some people might not know about it.
How did I not know about less +F? This literally changes everything in my job!
Maybe it's overkill, but I always just use vim. It loads very quickly and gives me the ability to search all around any log, jump to the bottom, etc. vim logfile, shift-g to get to bottom, :q to exit. Done.
@@nonconsensualopinion But does it follow?
Just came across this channel and I love it!
Thanks for showing us how wonderful Linux can be and how to use it.
If you ever need to purposefully mess up a terminal like for 9:47, I've found the command "sleep 1 | vim" will do that consistently on any terminal.
Can't believe I just upvoted a guy for messing up my terminal... XD
could not confirm:
root@debootstrap:~# sleep 1 | vim
-bash: vim: command not found
root@debootstrap:~#
/s
Vim is seriously the best text editor
It does not happened to me. Maybe because I have Neovim installed
@@iam3377 laughs in nvim
Quick note on the keyboard shortcuts: These are default Bash terminal commands, which are based on Emacs commands; however, you can also add "set -o vi" to your .bashrc to set Vi mode, and then you can use Vi shortcuts instead. Since one of the big things that keeps Vi[m] competitive with Emacs is the power of its navigation commands, this can make you even more efficient, though the learning curve is pretty severe if you're not already used to navigating in Vi, so obviously this is only something to do if it's already your preferred editor.
Holy cow, it's been 12 years since the last time I used Windows on my home PC, and I do use the CLI a lot, yet I didn't know some of those tricks. Great work!
Fyi, another nice thing about using less over tail is that you can put in some search terms before kicking on the live tail mode and they'll be highlighted.
Ex.
put in a /error|warning|critical
then hit shift+F and as things scroll by, error, warning, and critical will be highlighted.
You can even use & interested of / to filter what you like to see.
| ccze --mode ansi
also does that
I wonder if there is a way to get automatic highlighting like with bat.
Nice work, dude!
I love your videos, keep it up :D
Thank you so much Dave for sharing your knowledge, looking forward for future videos. Keep it up mate!
I already know I'm going to use that command line yanking so much, thank you!
8:52 LOL "Dammit Ubuntu. Ruin even..." Now I know you're a command-line warrior.
Great video! What I use probably the most is Ctrl+r to quickly search the command history. By using Ctrl+r you can go to the next hit and with Ctrl+R to the previous.
thanks
try fzf, it makes ctrl-r a dropdown list (i think it opens a tmux pane on the fly iirc) and lets you search in a fuzzy manner. And also search for files like that, I can't live without it anymore..
@@frydac yes, fzf is really awesome in various regards :)
Great video! I consider myself a seasoned shell user since I've been doing this stuff for 30+ years but you've taught me some new stuff. Two things to add though to fix a borked terminal is "stty sane" and "echo ctrl-v ctrl-o". Excellent tutorial!
first useful shell video tutorial I ever ran into
Fantastic post Man! Wanted some Ninja tricks to share with my Students tomorrow and these are perfect! Thanks so much!
I remember a while back you saying your co workers would give you a hard time about using advanced commands... I can see why , I have watched a lot of tutorials , some of the things you do I haven't seen ANYWHERE else. I like this channel because even if I go way back in your history everything is still relevant and useful. I've been subscribed but I forgot to hit the bell icon , so I didn't even know you were back. Glad to hear it though.
Love these hints and tricks, I'm probably pulling at least a few into daily life - Shot dude!
Thank you!!! This video should never die!
Some of those I didn’t know. You saved me loooots of minutes for sure.
Thanks!
Great tips, thanks for sharing! I'm proud that I knew a couple already but most are new to me. I'm going to incorporate these into my day to day for sure. The comment section is gold too.
Thanks for the video. Although I am using GNU/Linux for more than 15 years, I forgot about !! and I didn't know about C-x-e.
Thanks.
Thank you for sharing information which is immediately effective and useful.
These videos are great! Looking forward to more and more in-depth practical and theory based tutorials.
Yeah, I've got some advanced ones coming -- in-depth systemd tutorials, compiling a kernel, writing your own syscalls. Woohoo!
Realy cool shortcuts. It helped me a lot. You are great!
Loved the "BONUS ROUND!" :)
I was expecting to be disappointed (didn't notice who published it before I clicked watch, lol) but I didn't know a single one of these, thank you! All of your videos are great.
very informative, i often use for example "ssh " to repeat the last ssh ... command
Thanks for the tips! When I saw the alt+f/b, I realized how annoying it is without it.
About less +F, it's great for one logfile, but I can do tail multiple logs with tail, which is sometimes useful: tail -f /var/log/something/*.log
Less +F is brilliant! That will be quite useful for me, thanks.
BONUS tip was the best.
I have the issue all the time especially after using gdb ...
Thank you sir, U've earned a Subscriber
Thank you for all the work putting this together, and for teaching all us terminal plebs how to kick ass at terminal lol.
Again, thank you!
wow this is just wonderful, especially the reset command for me cos lately I have been using a remote shell and it usually gets weird after a while, but I tend to just manage...so this definitely works and I will be using it from now on, thanks!
as an adjunct to !!, I find I use !$ A LOT. This handy thing refers to the last argument on the last command. e.g. mkdir -p /home, then cd !$. This will be equiv to cd /home.
Try 'ESC + .'
@@jonatansmithtubed What's esc + do?
Kirt, it is "ESC" and the "." (dot)
Repeat last argument
fabulous presentation - muchas gracias
less -n helps a TON on large files (doesn't count line numbers). -S can be useful in logs as well (no wrap)
I almost always use `less -FRS`
-F will "quit if one screen" or "there is no need for scrolling"
-R will allow correct width calculation of control characters. Especially useful if you are piping a command and still want the color output.
Ok I’ve been using less longer than I want to admit. Will try “less -FRS”. 😂
Thank you! Very informative.
Super !! Thank you a lot!!!
These were very useful tips.
Your awesome channel popped up in my recommendations. Subscribed!
Thank for the video, I already know someone of this tricks, but others were new.
Nice tips and clean explanation. Thank you
Very handy tips. Appreciated.
Awesome vid!! Very helpful!
Sudo bang bang !
Something can never be forgotten 😂❤
Thx for the ctrl-k, ctrl-u, ctrl-w, ctrl-y tip. I didn't know that one. Even works in Zsh.
The ctrl-x-e trick is great for small modifications to commands from your history as well. You can up arrow, or bang or history | grep or whatever to a previous long gnarly command, then hit ctrl-x-e to make easier surgical modifications to it.
These tricks saved my day
Good video. I learned a couple of new tricks!
One trick I knew already and always use is the Alt- thing. I describe it to others this way - Alt- brings up the last "word" of the previous command. Think of it as an object. So you do ls /tmp/file. Now /tmp/file is the object. Want to know more about the object? Type ls -l Alt-. Contents? - more (or less) Alt-. File's junk - rm Alt-.
But what's more is say you have this in your history:
501 touch /tmp/file
502 ls /tmp/file
503 echo file?
504 uname -a
505 history
Typing Alt- at the command prompt will bring forth "history". But typing another Alt- will bring up "-a". Another one and you get "file?". One more and you get "/tmp/file". So if you want that Alt- object because it was say a filename object but it was not the last word of the immediately preceding command then keep hitting Alt- until you get back that file object.
very good tutorial, powerful commands, thank you.
Thank, I really appreciate less command explanation and would love to see more videos.
Nice collection. Thanks for the video!
Many thanks! On linux since 1995, yet most of this was new to me.
awuma whoah! you really should have known about !! or Ctrl+W. I'm working on the terminal for 3 years and I knew most of this.
@@sashamc309 congrats
1999 abs same feeling.
These are veeeeeery helpful!! Thanks bro :D
Awesome tips, thanks a lot!
Very nice tutorial, thanks
Thanks a lot for these tricks.
Thanks for all your free content :)
Thanks!! really helpful commands!!
For tip 5 you can just do "mtr !$" (last argument) or "mtr !*" (all arguments) which both have the advantage of not being terminal dependent (just relies on history). I think even without history "mtr $_" would work.
Or you can even have a bit of fun "^ping^mtr^"
Yes, if you want the detail of that you can refer to 9.3.1 and 9.3.3 in bash manual.
You can do stuff like, creating a file:
touch A/B/C/d.txt
then moving to the directory:
cd !$:h # h: Remove a trailing pathname component, leaving only the head.
You'll also see:
^string1^string2^ Quick Substitution. Repeat the last command, replacing string1 with string2. Equivalent to !!:s/string1/string2/.
Similar things exists for parameter substitution (which I personally only use for file names/paths manipulation):
www.gnu.org/software/bash/manual/bashref.html#Shell-Parameter-Expansion
www.tldp.org/LDP/abs/html/parameter-substitution.html
You have an example in the documentation that shows how this can be used:
www.gnu.org/software/bash/manual/bashref.html#A-Programmable-Completion-Example
Just Wao, I am gonna use em. Thanks Dude!
Perfect tricks. thank you so much!
I actually found the --curses tangent to be useful. I have cursed ubuntu myself when it popped up in a gui. Great tips keep up the good work.
You are a blessing, man. Thanks!
Thanks for 'less +F'. There's also a program called multitail which I have been installing on servers I manage for quite a while. It lets you follow multiple log files at once, also colors.
try using tail -qf foo.log bar.log and it will show new lines to both files ordered, and if one rotates and goes away but appears later keep tailing it, all as if it was just one file
That Ctrl + K and Ctrl + Y is legit. Thanks.
extremely helpful! thanks for the great video
The less instead of tail tip is great.
Thanks i learned about ctrl + x + e and less +F.
Alt . is a winner! Thanks for the vid and the timestamps ^^
Helpful man. Thank you.
Great tut. Very useful
I thought I knew a lot.... Great video... Thumbs up
Great idea with the less +F , I prefer using regular old less then pressing shift+G, it takes you to the bottom of the file and you can scroll up without gluing.
Awesome video man, thank you :)
These were great, thank you.
My recommendation for vim users: add ```set -o vi``` (or something like that, too lazy to look it up) to your bashrc, and use your favorite vi-keybindings in your shell (press esc to get into normal mode)
bro at first i thought you are gonna say some interesting but not useful stuff, but it was great. Thanks for Sharing , Keep up
I did not know less' +F option. Thanks a bunch, I'm sure that'll come in handy.
cool video bro. 2 min in and I already liked!
Some people just aren’t cut out to be teachers
Now Colt Steele is a natural born teacher right there.
Dude I'm watching this in 2021 and this super helpful. Kinda regretting went UA-cam didn't recommend earlier
Thanks for posting the Cheat Sheet; These things are soo handy for me.
Thanks for the video. Love it!
Nice examples! Did learn something new! Thank you! I would also mention "Ctrl - r" for searching in .bash_history. Something I use often...
Good work, guy!
This is awesome linux tips.
One of the best projects we had in university was building our own copy of bash (stripped down a bit obviously) from scratch in C. Even though I have built my own, I learn new stuff everytime i see videos like these.
I like that we almost got to see your auth.log
nice vid man, thanks for the tips and keep it up ! :)
thanks. this content is actually helpful.