Linux Crash Course - The df and du Commands
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- Опубликовано: 14 июн 2024
- In the Linux Crash Course series, we'll go over one important foundational Linux topic each episode. This series includes tutorials, demonstrations, and more! In this episode, we'll take a look at how we can determine how much storage we have remaining, and we'll also tackle how to determine which directories are using up the most space.
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Time Codes
00:00 - Intro
01:06 - Spin up your very own cloud Linux server with Linode
02:14 - Basic usage of the df command
02:52 - Viewing "human readable" output with df
03:42 - Understanding the output of the df command
05:41 - Viewing filesystem types with the df command
06:39 - Excluding filesystem types from the output of the df command (such as tmpfs)
10:31 - Basic usage of the df command
11:45 - Viewing "human readable" output with the du command
12:10 - Using the "max depth" option with the du command
14:08 - Viewing "summary" information with the du command
14:41 - Executing the du command against multiple directories
15:49 - Viewing the total size of multiple directories with the du command
16:47 - Jay's favorite usage of the du command
17:48 - Quick mention of the ncdu command
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#LearnLinux #Linux #CommandLine 
Наука
Your videos are always teaching me more about Linux. Keep em coming and I will keep watching and learning. Thanks for all you do.
Thank you for this video :)
There is also the so useful du command with the threshold option to filter only bigger files
`du -h -t 100M /tmp/*` for example to show only files greater than 100MB in /tmp
Thanks for the tip!
love learning new things from this channel - you are doing a great job Jay
I'm a linux admin who always use du -sch * inside /var/log to find disk consuming logs. I didn't know the meaning of s & c switches 😅😅
Ha ha, I do the same thing. I've got a bunch of commands that I use with switches that I just type from habit, probably looked them up decades ago, but forgot since then. 'netstat -tunlp' and 'ps -ealf' come to mind right away. I think I'll go man them now.
@@d00dEEE yup. I use
netstat -ntpl
ps aux
😅😅
Wow. Another right to point, no nonsense video.
Love your videos. Keep posting.
5:00 actually gibibytes. You need “-H” for decimal multiples, “-h” for binary.
This was super awesome and super helpful. Please keep this kind of content up.
This was a game changer! Thank you so much for this amazing video and keep up the fantastic work ❤
Good stuff. I always learn something new about these 40 year old command line utils from this channel. :)
30 Years as Linux was released 1991, if we are talking true Unix, try more like 50 years.
@@BDBD16 possibly older than 30 if the commands were made for the GNU system before Linux came along
@@shallex5744 I see what you did there you little daemon.
@@BDBD16 i don't think i did anything
You are amazing sir, thank you from my heart for making it so clear and understandable.. all respect to you and the family from Chicago 🇺🇸
Maksunnserjf
This is really awesome tutorial. Great work man.
excellent and very informative video - particularly the exclude option for df ... and the max depth option for du. 👍
so grateful for this video. I had a '/' directory that was 93% full. Gave the :
du -sm /
and it was hanging.
I guess --max-depth 1 could have helped navigate the filesys in order to pin point which subdirectory was too heavy. thank you for teaching me this switch.
Thanks as always Jay. Excellent.
I love this crash course series.
one useful flag in du is the --time It shows the time of the last modification to any file in the directory or subdirectory that you run it against.
Thanks as always for the informative content 💪🙏
Learning Linux will be so easy with these videos
Regarding the output of the df -hT command is worth to mention that when using ext4, as the filesystem by default, 5% of the blocks will be reserved for the super-user, to avoid fragmentation and if we sum the output of the columns Used + Avail the value will be different from what's displayed in the Size column. (445 GB in this case) and the remaining 23 GB up to the displayed size of 468 GB is in fact the 5% reserved space. This reservation can be adjusted with the help of the tune2fs command.
Great video man 👍🏻. Hey would you consider making a video simulating the RHCSA exam? This series would compliment that perfectly and honestly all other videos i can find simulating the RHCSA exam are very low quality, i think one from you would help a lot of people. Thanks beforehand
Outstanding!
Thank you so much!
thanks for the video
Great teaching as usual the way you have mastery of the command line and how you move and insert different commands is a teaching within its self. please consider and do a teaching on how you move letters and commands and insert different commands with ease because to a newbie it's difficult to understand how you do what you do.
Thank you!
Thank you for mentioning ncdu. For some reason it's not mentioned often, especially to new users, and it's so much better for interactive use than just plain du. I wish somebody has told me about it years ago when i just started using linux
thank you you are great teacher
Thank you! 😃
thanks very much
11:58 Actually mebibytes. And unlike the df command, you add “--si” to ask for decimal units. (Calling them “SI” units is misleading, since the binary multipliers are also defined by SI.)
Thanks!
Good commands to know.
Thanks for the reminder about ncdu! I was thinking "what's that tui-based du that sorts by size?" for most of the video, but couldn't remember what it was called.
8:07 You can specify the -x option multiple times, if you want to exclude more than one filesystem type from the listing. For example, on my Debian system, I have a filesystem of type “devtmpfs” mounted on /dev.
.. Cheers to you. ..
There's also a "gdu" command which you can install `sudo apt install gdu`.
gooooooooood
15:28 And here’s another feature of using du on multiple directories: what happens when one directory is contained within another?
For example, my current directory contains source code for some programming project. It also has a .git subdirectory containing the Git commit history for that project. If I do
du -ks .
that will show me the total usage for the entire directory. But if I do
du -ks .git .
now something wonderful happens: it first reports the usage for the .git subdirectory, then it shows the usage for the source directory _minus that of the .git subdirectory_ . So I see just the size of the current source tree, not including the commit history.
I always facing problem of getting / of getting 100% full. but unable to find exactly what directories or miunt point in / directories.
Thanks. I just yeeted 24G from my home directory that I didn't no was there.
about the 'root drive'- if there are multiple drives is there only 1 that is root over all of them or is it ''root' from each drive? What would make it the 'root'? The fact that is it the initial and 'over all' controlling point that allows access to pretty much (if not) everything else?
Also, what is a 'bootable' usb? Are al usb's bootable or no? If not, why not? What are instances of the differences- especially the bootable usb??
Maybe you have vids on these already. I'm not aware of them if they do exist (obviously).
There is always one root directory in a linux system. If you have multiple drives with Linux installed then you will have multiple root directories in corresponding drives. And if you want to use it in one linux system then you need to mount it there as normal directory/file and this directory acts as root for that mounted drive.
I installed 22.04 with standard “use entire disk” on my 170G SSD and df-H command says half of it is 100% full and I can’t acces the rest! I lonly have xfcedesktop and a few small programs running and it says it’s taking up 77G! No way! Now I can’t upgrade my system because it says there’s no more room. Something’s not right. How do I access the rest of the 80G and how do I clear out the bloat? I’m tempted to scrap the whole thing and start over!
nice
Could you not just use ./ for current dir?
I think I am the first viewer of this video🙂🙂
You are my g
Food for algorithm ;-)
*Kernel panic!* (Perhaps once or twice a year)
i really like it from pakistan
The good Device
平衡
Jay, the boring linux guy... this is great to fall asleep to.
why du -h - -max-depth 1 /home/jay shows more folders than sudo du -hsc /home/jay*?
The -x option isn't much use on ZFS systems showing filesystems such as "rpool/USERDATA/simonson_mn5ygm"
du -h -d1 /var/
Thanks!