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So, I needed a package installed on one of our Unix servers. The package manager--which is obsolete garbage--was failing with a message which can only be described as a variant of "Go fuck yourself". A quick Google search didn't help.
3 espressos and an eternity later, I have descended into a manic state. My hair has turned grey and I have started lactating. As a last-ditch effort, I try a new search query on Google, and the first link takes me to a forum with a thread discussing a similar issue. The last post in the thread has a solution which works for me. After fixing the issue, everything in the world feels right and I decide to thank the generous poster, who is like an angel to me at this point.
Guess what? The poster is none other than me. 8 months back, I had created a user account on the forum just to post the solution to a similar issue I had on another server.13 -
If Operating Systems Ran The Airlines
UNIX Airways
Everyone brings one piece of the plane along when they come to the airport. They all go out on the runway and put the plane together piece by piece, arguing non-stop about what kind of plane they are supposed to be building.
Air DOS
Everybody pushes the airplane until it glides, then they jump on and let the plane coast until it hits the ground again. Then they push again, jump on again, and so on ...
Mac Airlines
All the stewards, captains, baggage handlers, and ticket agents look and act exactly the same. Every time you ask questions about details, you are gently but firmly told that you don't need to know, don't want to know, and everything will be done for you without your ever having to know, so just shut up.
Windows Air
The terminal is pretty and colorful, with friendly stewards, easy baggage check and boarding, and a smooth take-off. After about 10 minutes in the air, the plane explodes with no warning whatsoever.
Windows NT Air
Just like Windows Air, but costs more, uses much bigger planes, and takes out all the other aircraft within a 40-mile radius when it explodes.
Linux Air
Disgruntled employees of all the other OS airlines decide to start their own airline. They build the planes, ticket counters, and pave the runways themselves. They charge a small fee to cover the cost of printing the ticket, but you can also download and print the ticket yourself. When you board the plane, you are given a seat, four bolts, a wrench and a copy of the Seat-HOWTO.html. Once settled, the fully adjustable seat is very comfortable, the plane leaves and arrives on time without a single problem, the in-flight meal is wonderful. You try to tell customers of the other airlines about the great trip, but all they can say is, "You had to do what with the seat?"10 -
Client: "Do you think we could finish specs in week 33, see a demo in week 35, and aim for the product to be finished in week 39?"
I jump on the conference room table, rip the shirt off my sweaty chest, and yell:
"WEEKS OF WHAT? 31 WEEKS SINCE YOU BECAME A CLIENT, 35 WEEKS FROM NOW, 39 WEEKS INTO THE PREGNANCY? BLOODY FUCKING HELL MAN, DO YOU HAVE TO TALK LIKE A RETARD?"
Client, unfazed: "Weeks since the start of the year, sir"
Me, swinging my pants above my head like a lasso:
"WHAT THE FUCK KIND OF SNOWFLAKE ARE YOU, YOU REALLY EXPECT ME TO COUNT THE WEEKS SINCE THE START OF THE YEAR? WHAT ABOUT JUST USING DAY OF THE MONTH YOU OBNOXIOUS DIMWIT?"
Client: "We always use weeks at our company to plan things"
Me, winding the legs of my pants around the neck of the client:
"I HATE IT WHEN PEOPLE USE WEEKNUMBERS, JAKE. I. FUCKING. HATE. IT."
Client, still pretending everything is fine: "If you want I could send you a screenshot of my outlook calendar?"
Me, sitting in underpants on the client's back, sweaty legs wrapped around his waist, trying to pull out his gel-infested manager-hair while strangling him with my pants:
"TIME OF DEATH, UNIX TIMESTAMP 1595240810, ISO 8601 DATE 2020-07-20T10:26:50+00:00. ANOTHER PROJECT SUCCESSFULLY WRAPPED UP"
(parts of this story may have been dramatized to reflect my underlying emotions)30 -
Sharing a short story.
Time: 1:30 am
Conversation between me and a night watchman in my society.
I was walking and this watchman suddenly stopped me and started asking questions.
Watchman: Isn't it late at 1:30am. When do u sleep?
Me: I sleep very late (replied in a very uninterested manner)
Watchman: Which year are you?
Me: Final year of Graduation
Watchman: Which branch?
Me: (a bit annoyed now) Software Engineering
Watchman: So you know programming?
Me: (little shocked that he knows what's programming) Learning
Watchman: So, do your university teaches C, Python and UNIX?
Me:(completely shocked by his knowledge) Yup. Except UNIX, others yes.
Watchman then asked some fees related questions and placements scope.
I was annoyed when he approached me for a little talk.. But had a wonderful experience talking to this person. It's great when you meet such unexpected person having such knowledge.
When I asked him how he knows all these, he said he talks like this to many students and learnt it.
His last line to me when I said that you know a lot, was:
Sir, you are the ocean, I am a needle in it.
Truly awesome moment... Never judge anyone by looks or his occupation... Knowledge is something that anyone anywhere can gain...
Respect to that watchman...5 -
On Thursday, May 20, 2088 9:55:59 PM, my life will be complete: Unix Epoch time will equal 0xdeadbeef.10
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curl cheat.sh — get an instant answer to any question on (almost) any programming language from the command line
tldr
do curl cht.sh/go/execute+external+program to see how to execute external program in go
And this question: why I actually should I start the browser, and the browser has to downloads tons of JS, CSS and HTML, render them thereafter, only to show me some small output,
some small text, number or even some plot. Why can't I do a trivial query from the command line
and instantly get what I want?
I decided to create some service that will work as I think such a service should work.
And that is how wttr.in was created.
Nowadays you probably know, how to check the weather from the command line, but if not:
curl wttr.in
or
curl wttr.in/Paris
(curl wetter in Paris if you want to know the weather in Paris)
After that several other services were created (the point was to check how good the console
can solve the task, so I tried to create services providing information
of various nature: text, numbers, plots, pseudo graphic etc.):
curl rate.sx/btc # to check exchange rate of any (crypto)currency
curl qrenco.de/google.com # to QRenco.de any text
And now last but not least, the gem in this collection: cheat.sh.
The original idea behind the service was just to deliver a various UNIX/Linux command line cheat sheets via curl. There are several beautiful community driven cheat sheet repositories such as tldr, but the problem is that to use them you have to install them first, and it is quite often that you have no time for it, you just want to quickly check some cheat sheet.
With cheat.sh you don't need to install anything, just do:
curl cheat.sh/tar (or whatever)
you will get a cheat sheet for this command (if such cheat sheet exists inf one of the most popular community-driven cheat sheet repositories; but it surely does).
But then I thought: why actually show only existing cheat sheets? Why not generate cheat sheets or better to say on the fly? And that is how the next major update of cheat.sh was created.
Now you can simply do:
curl cht.sh/python/copy+files
curl cht.sh/go/execute+external+program
curl cht.sh/js/async+file+read
or even
curl cht.sh/python/копировать+файл
curl cht.sh/ruby/Datei+löschen
curl cht.sh/lua/复制文件
and get your question answered
(cht.sh is an alias for cheat.sh).
And it does not matter what language have you used to ask the question. To be short, all pairs (human language => programming language) are supported.
One very important major advantage of console oriented interfaces is that they are easily
programmable and can be easily integrated with various systems.
For example, Vim and Emacs plugins were created by means of that you can
query the service directly from the editor so that you can just write your
questions in the buffer and convert them in code with a keystroke.
The service is of course far from the perfection,
there are plenty of things to be fixed and to be implemented,
but now you can see its contours and see the contours of this approach,
console oriented services.
The service (as well as the other mentioned above services) is opensource, its code is available here:
https://github.com/chubin/cheat.sh
What do you think about this service?
What do you think about this approach?
Have you already heard about these services before?
Have you used them?
If yes, what do you like about them and what are you missing?24 -
fork() can fail: this is important
Ah, fork(). The way processes make more processes. Well, one of them, anyway. It seems I have another story to tell about it.
It can fail. Got that? Are you taking this seriously? You should. fork can fail. Just like malloc, it can fail. Neither of them fail often, but when they do, you can't just ignore it. You have to do something intelligent about it.
People seem to know that fork will return 0 if you're the child and some positive number if you're the parent -- that number is the child's pid. They sock this number away and then use it later.
Guess what happens when you don't test for failure? Yep, that's right, you probably treat "-1" (fork's error result) as a pid.
That's the beginning of the pain. The true pain comes later when it's time to send a signal. Maybe you want to shut down a child process.
Do you kill(pid, signal)? Maybe you do kill(pid, 9).
Do you know what happens when pid is -1? You really should. It's Important. Yes, with a capital I.
...
...
...
Here, I'll paste from the kill(2) man page on my Linux box.
If pid equals -1, then sig is sent to every process for which the calling process has permission to send signals, except for process 1 (init), ...
See that? Killing "pid -1" is equivalent to massacring every other process you are permitted to signal. If you're root, that's probably everything. You live and init lives, but that's it. Everything else is gone gone gone.
Do you have code which manages processes? Have you ever found a machine totally dead except for the text console getty/login (which are respawned by init, naturally) and the process manager? Did you blame the oomkiller in the kernel?
It might not be the guilty party here. Go see if you killed -1.
Unix: just enough potholes and bear traps to keep an entire valley going.
Source: https://rachelbythebay.com/w/2014/...12 -
A group of Security researchers has officially fucked hardware-level Intel botnet officially branded as "Intel Management Engine" they did so by gathering it all the autism they were able to get from StackOverflow mods... though they officially call it a Buffer Overflow.
On Wednesday, in a presentation at Black Hat Europe, Positive Technologies security researchers Mark Ermolov and Maxim Goryachy plan to explain the firmware flaws they found in Intel Management Engine 11, along with a warning that vendor patches for the vulnerability may not be enough.
Two weeks ago, the pair received thanks from Intel for working with the company to disclose the bugs responsibility. At the time, Chipzilla published 10 vulnerability notices affecting its Management Engine (ME), Server Platform Services (SPS), and Trusted Execution Engine (TXE).
The Intel Management Engine, which resides in the Platform Controller Hub, is a coprocessor that powers the company's vPro administrative features across a variety of chip families. It has its own OS, MINIX 3, a Unix-like operating system that runs at a level below the kernel of the device's main operating system.
It's a computer designed to monitor your computer. In that position, it has access to most of the processes and data on the main CPU. For admins, it can be useful for managing fleets of PCs; it's equally appealing to hackers for what Positive Technologies has dubbed "God mode."
The flaws cited by Intel could let an attacker run arbitrary code on affected hardware that wouldn't be visible to the user or the main operating system. Fears of such an attack led Chipzilla to implement an off switch, to comply with the NSA-developed IT security program called HAP.
But having identified this switch earlier this year, Ermolov and Goryachy contend it fails to protect against the bugs identified in three of the ten disclosures: CVE-2017-5705, CVE-2017-5706, and CVE-2017-5707.
The duo say they found a locally exploitable stack buffer overflow that allows the execution of unsigned code on any device with Intel ME 11, even if the device is turned off or protected by security software.
For more of the complete story go here:
https://blackhat.com/eu-17/...
https://theregister.co.uk/2017/12/...
I post mostly daily news, commentaries and such on my site for anyone that wish to drop by there19 -
They: What do you do for a living?
Me: DevOps, FreeBSD Administration, Ruby, ...
They: hmm?
Me: administrator for UNIX systems
They: whut?
Me: I do stuff with computers
They: I really like Apple
Me: *sigh*
.... and every time, too...10 -
My first semester in college I had a six-week Saturday course on how to use UNIX that ran from 9-12. The professor hada habit of going at least an hour over time each week, so by the fourth week we're getting a bit tired of it.
That particular session, right at noon, he decided to teach us how to message other people on the network. Finally, we made our way over to the wall command a half hour later. Bored to tears, I type the following into my console:
wall "Are we done yet?"
Suddenly, the projector updates:
Kaji says:
"Are we done yet?"
Not realizing my name was going to be attached to it, I sank back into my seat a bit. The professor glared at me for about 5 seconds, then promptly wrapped up. Future class sessions ended on time. -
Got a call from Google!
Asked for two months to study: Discrete mathematics, Calculus, introductions to algorithms, design patterns, CTCI and linux/unix OS workings in general.
I know I'll be banging my head against the wall and I don't have my expectations too high. But regardless I feel like this is a good excuse to speed up my studies and push myself in the direction I want to go already. It'll be a win-win even if I don't land the position because I'll definitely gain a ton in the process of preparing.
I will be expose to all of this material (except for calculus because I've been learning it for a couple of months) for the first time so I know it'll be a challenge and I am looking forward to it.
If any of you have any tips on good study habits that'll be much appreciated; I currently like to read most of my material and supplement with videos/tutorials... Khan is great but they lack material on discrete mathematics unfortuantely. Thanks in advance!
Wish me luck (:8 -
When I was 23 or so, I worked nights in a tier-1 control room. Each workstation had a win98 desktop, and two HPUX workstations running CDE. I read all of the lord of the rings in text files on the HPUX machines, and since it was in an xterm window, my supervisor thought I was just tailing logs.7
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When I was in college, our email was on a Unix server. We would login via serial connection or telnet over the network, and get a korn shell. The server was poorly secured. Everyone's login device was world writable. So people would just see who was online, see the username of someone they wanted to mess with, take note of the pts(network) or tty(serial) device their connection used, and cat ASCII penises to it.
cat animated_dong.txt > /dev/pts/4
It was a simpler time.2 -
That moment that you come across a domain name which you thought would have definitely been taken already.
Came across strtoti.me. (php function for converting date/time strings into unix epoch's). Quickly wrote an api for it and put it online because fuck it, why not!
Feel free to use it as much as you want, I can't guarantee its availability unless it would become really popular but I can't imagine that.
URL: https://strtoti.me
API example: https://strtoti.me//... 20 20:15
API example (url encoded): https://strtoti.me//...
API documentation (not that good yet, might improve it..): https://strtoti.me
Well, let's see how this goes. Feedback appreciated but I currently have a shitload of projects to it doesn't have the highest priority right now!12 -
1. Scripting out a team. I've built a collection of bash scripts to do what one of our teams does. Except the script does it in 30min and always does it well where that team used to take 4 to 10 hours and almost always missed something in the way.
2. Automate 70-80% of our BAU tasks with a single >4k loc bash script. Integrations with servicenow, lots of internal portals, predefined huge sets of commands to run on separate servers or lists of servers, do all sorts of diagnostics, schedule hw maintenance for DC folks, chase for approvals, track CHNG/CTSK tickets in a graphical chart so we would not miss any of them and lots lots more.
Finally we were able to afford time to make some coffee/tea.
These are the bau optimizations I'm proud of the most. And they have made significant impact on how our teams operate.
Whoever recognizes both company values in the tags and know what is that company - are they still using ´S´ in unix team? :)1 -
Had a great time yesterday explaining a C++ dev on a UNIX box that yes, he actually has to shut down his machine before adding this new extra 8gb memory...4
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I love how the Keybase Linux client installs itself straight into /keybase. Unix directory structure guidelines? Oh no, those don't apply to us. And after uninstalling the application they don't even remove the directory. Leaving dirt and not even having the courtesy to clean it up. Their engineers sure are one of a kind.
Also, remember that EFAIL case? I received an email from them at the time, stating some stuff that was about as consistent as their respect for Unix directory structure guidelines. Overtyping straight from said email here:
[…] and our filesystem all do not use PGP.
> whatever that means.
The only time you'll ever use PGP encryption in Keybase is when you're sitting there thinking "Oh, I really want to use legacy PGP encryption."
> Legacy encryption.. yeah right. Just as legacy as Vim is, isn't it?
You have PGP as part of your cryptographic identity.
> OH REALLY?! NO SHIT!!! I ACTIVELY USED 3 OS'S AND FAILED ON 2 BECAUSE OF YOUR SHITTY CLIENT, JUST TO UPLOAD MY FUCKING PUBLIC KEY!!!
You'll want to remove your PGP key from your Keybase identity.
> Hmm, yeah you might want to do so. Not because EFAIL or anything, just because Keybase clearly is a total failure on all levels.
Written quickly,
the Keybase team
> Well that's fucking clear. Could've taken some time to think before hitting "Send" though.
Don't get me wrong, I love the initiatives like this with all my heart, and greatly encourage secure messaging that leverages PGP. But when the implementation sucks this much, I start to ask myself questions about whether I should really trust this thing with my private conversations. Luckily I refrained from uploading my private key to their servers, otherwise I would've been really fucked.