Hello, I yet again come, hat in hand, for assistance from those wiser in the ways of the Linux. I’m having a bit of an issue downloading Jellyfin on my ElementaryOS laptop. I’ve tried all the guide on the first few pages of ddg only to receive errors after entering the comman “ sudo apt-get update “. I get ERR:3 https//repo.jellyfin.org/debian circle Release 404 Not found.
If someone can point me the way I’d be most appreciative
You can do some wild shit with pipes:
head -10 /var/log/syslog- Look at the first ten lines of one of your log files, with timestamps on the frontcat /var/log/syslog | cut -d' ' -f1- Splits the lines by a space delimiter (the-d' 'part), and grabs the first “field” (the one with the timestamp, using-f1)cat /var/log/syslog | cut -d' ' -f1 | cut -dT -f1- Splits the timestamp at the “T”, and leaves only the datecat /var/log/syslog | cut -d' ' -f1 | cut -dT -f1 | sort | uniq -c- Gives you a count of each dategrep systemd /var/log/syslog | cut -d' ' -f1 | cut -dT -f1 | sort | uniq -c- For only the lines with ‘systemd’ on it, gives you a count of each dateThe standard GNU toolkit has a ton of utilities like that for doing stuff with text files.
Me, a simpleton,
“Wut dat mean”
At work whenever we need to build little command line tools, my team is always vexxed by my guideline to have the meat+potatoes in a script that reads well-formatted data off stdin , and outputs well formatted-data to stout. They always wanna have some stupid interactive prompts and saving to files baked right in.
This is exactly why. You wanna save to a file?? > file
You want to read from a file? cat |
You want to save to a file but swap commas for colons? Sed.
You get so much FOR FREE w/ the GNU toolkit, even for what you build yourself, by thinking in streams.
When trying to explain that concept, I like showing people this: https://www.youtube.com/watch?v=tc4ROCJYbm0&t=296
Wow, this was a treat to watch. Never would have imagined Brian Kernighan would be explaining shell pipeline to me in such a cosy setting
I find it unbelievably cool that the guys who came up with this got it so right the first time, that its still incredibly powerful today.