Learning Sed Is Beneficial For Linux Users
ฝัง
- เผยแพร่เมื่อ 23 มิ.ย. 2021
- sed is a stream editor. A stream editor is used to perform basic text transformations on an input stream (a file or input from a pipeline). The most common usage of sed involves substituting a pattern or string for another string. But sed can be used for many tasks. It's a powerful command line utility that should be in everyone's tool bag.
REFERENCED:
► www.gnu.org/software/sed/manu... - Sed Manual
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Drink every time dt says "let me clear the screen" 😁
I took a drink every time he said sed 's/sed/replace/g' drink
Nlt dtrunk weeyt
Drinking....
But... Um...
sed and AWK are the first two tools I learned in undergraduate Linux class. They are so important, glad to see some brilliant recaps from DT!
@@try1785 I'm pretty sure any college with a Computer Science program has Linux classes
@@try1785 It's a class called Computer Software and System, sound pretty generic but it only focused on UNIX-like OS usage and history. The professor at the time was like, hey I think our students need to know these so let's open this course. Guess it varies among colleges. Now students have more choices, like DT's videos or MIT's popular 'missing semester'.
@@tweakernation I had Linux class, but used sed and awk more on Cybersecurity class, where we had to write many bash scripts.
@@tweakernation we never had :_)
I really appreciate your high quality content. That takes Linux to a really high level!
This title is way better than the one for the awk vid
That title was just awkward.
Except for Germans, because SED was the socialistic party which controlled the dictatorship in East-Germany build by the Soviets...
@@alicethegrinsecatz1611 DIE PARTEI HAT IMMER RECHT 😂
What works when you want to search for a word is to use the boundary characters, which happen to be \< for left and \> for right.
So if you search for the sequence \, it's gonna try to find the word red alone, not included in another word.
Just wanted to write the same thing ... :)
good to know
Thanks for the tip
This guys channel I just discovered and it is highly underrated. Love the clarity and explanations of everything with lots of examples. Thank you.
I love the new background and environment for your recording space! Looks so good!
I knew this was coming as soon as I saw the awk tutorial. Great content, I appreciate it
Your videos are very comprehensive and upto the point. Keep it up
When creating sed regex expression it's a good idea to check what has been modified:
$ sed '...' inputfile | diff inputfile
you can pipe it further to a program that colorizes text:
$ sed '...' inputfile | diff inputfile | bat -l diff
For vim users you can use vimdiff (easier side by side comparison), but "process substitution" has to be used to trick vim that pipe is a file:
$ vimdiff inputfile
I recently saw your sed and awk command tutorials both are really helpful. Thank You ❣️ D.T, for making this useful tutorials .
I just love watching everyone's take on AWK & SED @DistroTube... So much fun an info once more!
Loved the little joke at the end... Lol Lol Lol
Thanks DT for the video!
LLAP
that's a very nice tutorial! thanks
also i've noticed the lighting looks like you're in a proper studio on a photo shoot or something, cool stuff
brother DT, i want to thank you for making these videos.
i swapped over full time to linux around 2 months ago.
your videos have taught me so much, and i now have a desktop that looks incredible, that does incredible things.
hands down my favourite linux creator in the tube.
keep up the amazing work!!!!!
I knew all of the other Linux CLI utilities, but I always found the syntax of ‘sed’ funky.
Thank you for your excellent explanation, DT!
It’s way more efficient than using my text editor’s built-in search and replace feature!
Been using sed for years, it's always good to watch how other people use it, you tend to pick up a few things you didn't know.
Stream editor goodness! Thanks DT
Learning regex changed my life.
Thank you so much for this video!!! Really appreciated
Srs, if you want to see some masterful sed code, check out games written in sed. Tetris, Breakout, Chess, etc. It’s humbling and trippy looking at the source.
Really! That's interesting... :-D
LLAP
@@BrucesWorldofStuff LLAP 🖖
Wait that’s possible? I thought sed’s only for substituting and replacing
What a nice function, thanks for the explanation!
hey it was a very good session.. Thanks for this. I am going to watch your awk next...
I recently saw your awk video and now this sed video. Both are really great and I have learned a lot. Just one thing I want to point out as I had this issue just this week:
If you have a big file e.g. let's say 3Gb log file and want to have 1000 line starting at line 30000 sed is a lot quicker then awk with this.
In my test `sed -n '30000,31000p' file.log` took like 3 seconds while `awk 'NR==30000,NR==31000 {print $0}' file.log' took almost a minute
when -i option was added to sed, that was life changing - and that can use -e to specify multiple expressions to apply on the stream - sed is kind of like the single most potent unixy power tool
you posted this as I was trying to write a script to use pywal with lightdm-mini thanks dt
Awesome tutorial about sed .. Single stop for learning sed ..
amazing course .thx dude
awesome man!
'Pro' tip: most shells will clear the screen when you hit CTRL-L :)
[edit] Oh, and CTRl-A and CTRL-E will take you to the beginning/end of the line (i.e. Emacs navigation commands).
Third!
thank you man , so important command
Would love to see DT talk more about shell scripting but in a more advanced way
Very very good sir. Keep up good work sir.
I found your video so useful!
your audio quality is good (again!)
It's ok here, but can tell the gain is way up, it's max-ing out and causing DT to sound like he has a lisp at the end of most sentences!
thanks.. high quality content
Thank you bro!
Thanks, studying this cmd in school atm
Good video!
Hi sir
useful video about sed.
tnx
amazing . thank you.
I’m a beginner and this video opend my brain 🧠
Really good! Thank you. I learnt a llot of tricks. One thing I would have liked to see included is capture groups. How do you capture specific strings? Top quality, thanks!
nice, thanks!
If you're using GNU then you can match an exact word using /\bword\b/. The anchor "\b" represents a word boundary. You can also use /\/.
If you want to search for a word instead of a string, surround the word with \b. For example: sed 's/\bred\b/green/'
for me an eye opener on sed was learning vim’s ex mode.
sometimes it’s even faster to filter lines in vim through sed instead of running a similar vim ex command.
Thx for your work. 🐧🦎🐧
For GNU Sed, we can use the input's file name directly, without using '
When you made the video on Awk the forest thing that came to my mind was Sed
Great!
18:00 you can do this with head (and even tail) too by writing "head +15 test.txt"
Subscribed! :) Although you speak incredibly fast for a foreign person like me Lol you are awesome! Thanks a million, really appreciate all of your great contents that I'm going to go through at any spare time I have ;) Have a great Easter holidays!
Now we need a digreen file manager
Well nice video .. how to delete one empty line if the next line is an empty line ? And for printing x numbers of line you can use head -n XX file and avoid sed/awk.
I want to add this sed, I use this to edit my host file. This will essentially add a line of text after the first match pattern. For example ==== sed -i '0,/pattern/!b;//a[the text u want to add]' filename
"sed 11q.. it's really just a poor mans awk NR 13"
I gotta love your humor, DT.
Makes for great lessons.
hey DT, what do you think about the Level099Techs videos on Bash commands?
Had to replace hundreds of lines in a file with duplicate lines because a lazy coworker wouldn't do it themselves. Never again. Thanks for the video.
May you please do a video on just. Just is a command runner ment to fix some of the command runing problems of make. It really replaces make for me.
Selection whole word i ezy in sed '\bword\b' gets whole word.
If i want to add a letter or a string at start of every line, then what would the command look like?
Hi, may I ask how did you make your CLI show a type-ahead suggestion?
Like for example when you started typing the command "sed", it already shows something like a format of what to type next in grey color.
Is it from history?
Thanks in advance!
what linux distro do you use and also the desktop enviroment and terminal?
It seems to use a non standard version of regular expressions.
Could someone please comment the name of the shell-color-script shown in this video, the random-colored histogram one? And can someone show where it can be downloaded? It doesn't seem to be on the DistroTube gitlab page. Thank you, Derek for awesome YT Linux content and instruction! Any further collections of shell-color-scripts would be much appreciated.
@13:21 I understand how this command works
But I don't get why it doesn't work if we replace the * with a +
we're looking for one or more spaces at the end of each line, so it should work when using + instead of *
what am I missing here ?
Thanks for the video! I noticed some subtitle issues. Can they be corrected? Thank you sincerely.
Is there a difference between:
sed 's/find/replace/' < file1 > file2 //that i notice you use this redirect
and
sed 's/find/replace/' file1 > file2
sed and unlimited power are synonyms.
…I wonder how to replace all occurences of a period with a comma, before the first space in a line...
This is way better than the grapes video.
hey dt, your opinions about windows 11 "the proprietary garbage"
How did you customize your man pages ?
what is the GUI being used here?
Sed in Spanish means "be yourselves" (plural imperative second person of to be) or thirst
Must I write "first" if it happens to be so ?
Well, you did write it...
Lucky guy... I envy you.
so, what is the difference between regex and sed command?
Hello dt , i know this may be far fetched but is there a chance you can make an iso of your arch with all the theming and text editors (emacs) and terminal configuration settings for your viewers. I really appreciate your arch setup.
I admire the cooperation of your rapid thinking and typing commands, but for me 0.75 speed is ideal.
I actually think that the space search pattern is not optimised, it is way better to use a '+' since it will only act when it is 1 or more instead of 0 or more. With '*', the command will make an action every single line, that's unefficient.
great tutorial but font too small for mobile phone
step 1: learn sed
step 2: pull hair out trying to get |sed to stop corrupting filenames
step 3: learn to use parameter expansion instead (usually)
1:25 Why use < when you can just pass a filename as an argument to sed like this?
sed 's/find/replace/' filename
Beginner's guide? Maybe just the syntax he's used to
What is this tldr??
How's your man page colourful?
14:46 doesn't \s also work? (\\s)
Pssst... that’s what she sed...
In reality, dt's name isn't "Taylor" nor "Tyler", it's either "Tayler" or "Tylor".
I thought it was Tiffany?
@@1MinuteFlipDoc That's a good one ! But dt is wearing a shirt with "Marley" written on it so I guess it's his real name...
10:40 sed 's/usr/u/g; s/bin/b/g' should also work.
18:00 Not really, because you told sed to give you 11 lines. *confused*
Just use ed, the standard editor.
I immediately find “ampersign” to be a far superior word to ampersand.
Well at least the title isn't as presumptuous as the last.
I have no idea what he just sed.
That's what she sed.
Derek Tyler
your 'i don't know' sounds like sheldon's
Is it only me always doing a extended regex for Sed even if its not actually needed? Lol.
sed -E '...'
Are you Tyler Derden?