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1500 questions
161
votes
4 answers
How to add repository from shell in Debian?
In Ubuntu one can add a repository via following command -
sudo add-apt-repository ppa:yannubuntu/boot-repair
As Ubuntu is based on Debian code base, I was expecting that the same would work in Debian too, but it doesn't.
What is the reason for…
Kshitiz Sharma
- 8,785
161
votes
5 answers
What is a Superblock, Inode, Dentry and a File?
From the article Anatomy of the Linux file system by M. Tim Jones, I read that Linux views all the file systems from the perspective of a common set of objects and these objects are superblock, inode, dentry and file. Even though the rest of the…
Navaneeth Sen
- 9,489
161
votes
11 answers
How can I run a cron command with existing environmental variables?
How can I run a cron command with existing environmental variables?
If I am at a shell prompt I can type echo $ORACLE_HOME and get a path. This is one of my environmental variables that gets set in my ~/.profile. However, it seems that ~/.profile…
cwd
- 45,389
161
votes
9 answers
dd vs cat -- is dd still relevant these days?
I recently realized we can use cat as much as dd, and it's actually faster than dd
I know that dd was useful in dealing with tapes where block size actually mattered in correctness, not just performance. In these days, though, are there situations…
kizzx2
- 1,833
- 2
- 12
- 9
161
votes
14 answers
How do I know if dd is still working?
I've not used dd all that much, but so far it's not failed me yet. Right now, I've had a dd going for over 12 hours - I'm writing an image back to the disk it came from - and I'm getting a little worried, as I was able to dd from the disk to the…
eckza
- 2,179
160
votes
10 answers
How to remove an audio track from an mp4 video file?
I have an mp4 video file with multiple audio tracks. I would like to strip away the rest of the tracks and keep just one. How do I do this?
tshepang
- 65,642
160
votes
2 answers
How do we specify multiple ignore patterns for `tree` command?
I need to print the directory structure of our production system and I would like to remove some specific directories from the tree?
How do we specify multiple ignore patterns for tree command?
Bharat Sinha
- 1,743
160
votes
9 answers
How do I remotely edit files via ssh?
I have to edit some files placed on some server I could reach via ssh.
I would prefer to edit these files in customized vim on my workstation (I have not rights to change vim settings on remote server). Sometimes I would like to edit a file with…
Loom
- 3,953
159
votes
5 answers
systemctl status shows : "State: degraded"
When I run systemctl status, I get State: degraded at the top,
● x230
State: degraded
Jobs: 0 queued
Failed: 1 units
Since: Wed 2018-05-30 17:09:49 CDT; 3 days ago
....
What's going on, and how do I fix it?
Evan Carroll
- 30,763
- 48
- 183
- 315
159
votes
5 answers
Download only format mp4 on youtube-dl
How can I use the download-dl to download video through url playlist only format mp4 instead format .mkv or .webm?
I use this command to download videos: youtube-dl -itcv --yes-playlist https://www.youtube.com/playlist?list=....
The result this…
Edgar Oliveira
- 1,971
158
votes
2 answers
Any way to encode the url in curl command?
I have some url which has space in it's query param. I want to use this in curl,
e.g.
curl -G "http://localhost:30001/data?zip=47401&utc_begin=2013-8-1 00:00:00&utc_end=2013-8-2 00:00:00&country_code=USA"
which gives out
Malformed Request-Line
As…
Aashish P.
- 1,581
158
votes
4 answers
locate vs find: usage, pros and cons of each other
In Linux and Unix systems there are two common search commands: locate and find.
What are the pros and cons of each? When one have benefits over the other?
m0nhawk
- 2,627
158
votes
5 answers
How do I attach a terminal to a detached process?
I have detached a process from my terminal, like this:
$ process &
That terminal is now long closed, but process is still running, and I want to send some commands to that process's stdin. Is that possible?
Rogach
- 6,303
158
votes
8 answers
Clone ownership and permissions from another file?
Is there a command or flag to clone the user/group ownership and permissions on a file from another file? To make the perms and ownership exactly those of another file?
user394
- 14,404
- 21
- 67
- 93
158
votes
8 answers
Simple way to create a tunnel from one local port to another?
I have a development server, which is only accessible from 127.0.0.1:8000, not 192.168.1.x:8000. As a quick hack, is there a way to set up something to listen on another port (say, 8001) so that from the local network I could connect…
waitinforatrain
- 1,685