Linux

47929 readers

1223 users here now

From Wikipedia, the free encyclopedia

Linux is a family of open source Unix-like operating systems based on the Linux kernel, an operating system kernel first released on September 17, 1991 by Linus Torvalds. Linux is typically packaged in a Linux distribution (or distro for short).

Distributions include the Linux kernel and supporting system software and libraries, many of which are provided by the GNU Project. Many Linux distributions use the word "Linux" in their name, but the Free Software Foundation uses the name GNU/Linux to emphasize the importance of GNU software, causing some controversy.

Rules

Posts must be relevant to operating systems running the Linux kernel. GNU/Linux or otherwise.
No misinformation
No NSFW content
No hate speech, bigotry, etc

Related Communities

Community icon by Alpár-Etele Méder, licensed under CC BY 3.0

founded 5 years ago

MODERATORS

[email protected]

143

Noob Question Thread: Ask Any Questions About Linux! (lemmy.ml)

submitted 1 month ago by [email protected] to c/[email protected]

153 comments fedilink hide all child comments

Ever had a question about Linux but felt too afraid to ask? Well now's your chance, ask any question about Linux, no matter how noob or repeated it is, and I and others will help answer them.

Previous noob question thread: https://lemmy.ml/post/14261893

you are viewing a single comment's thread
view the rest of the comments

[–] [email protected] 2 points 1 month ago

The other day I learned that you can just grep an unmounted filesystem device. It will read the entire disk sequentially like it's one huuuuge file. And it will reveal everything on that disk... whether a file inode points to it or not.

Used it to recover data from a file I accidentally clobbered with an errant mv command. It's not reliable, but when you delete a file, it's usually not truly gone yet... With a little luck, as long as you know a unique snippet that was in it, you can find it again before the space gets something else written there. Don't even need special recovery tools to do it, just use dd in a for loop to read the disc in chunks that fit in RAM, and grep -a for your data.