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20 questions linked to/from Linux: Difference between /dev/console, /dev/tty and /dev/tty0
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35 votes
3 answers
72k views

I'm on a Mac but I think this is generally Unix-applicable. I'm in the process of learning shell scripting and there's something I seem to be missing. When I'm in the ordinary terminal, I can use ...
temporary_user_name's user avatar
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27 votes
2 answers
21k views

From this answer to Linux: Difference between /dev/console , /dev/tty and /dev/tty0 From the documentation: /dev/tty Current TTY device /dev/console System console /dev/tty0 Current ...
Tim's user avatar
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8 votes
2 answers
13k views

I can see the difference between /dev/tty and /dev/tty0 by testing the provided method from this question. But I really wonder about the practical usage of those devices (like situations they will be ...
Ron Vince's user avatar
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6 votes
3 answers
5k views

There are common pairings of escape sequences to ASCII control characters, such as Ctrl-C and Ctrl-Z to ETX and SUB, respectively. On the Wikipedia Control Codes page, there are most pairings, but no ...
novelistparty's user avatar
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7 votes
3 answers
3k views

Related to TTY numbers, it looks like there are 64 TTYs (find /dev -name 'tty[0-9]*' | cut -c 9- | sort -n | tail -n 1 and documentation). tty0 is the current virtual console, Ctrl+Meta+F1 reports ...
l0b0's user avatar
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17 votes
1 answer
3k views

Does Posix require any devices? For example, /dev/urandom, /dev/zero or /dev/null? I suspect not because of non-*nix OSes, but wanted to ask for completeness.
user avatar
9 votes
1 answer
14k views

Here is from my Ubuntu $ ls /dev/*tty* /dev/tty /dev/tty17 /dev/tty26 /dev/tty35 /dev/tty44 /dev/tty53 /dev/tty62 /dev/ttyS12 /dev/ttyS21 /dev/ttyS30 /dev/tty0 /dev/tty18 /dev/tty27 ...
Tim's user avatar
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6 votes
3 answers
4k views

Specifying systemd.debug-shell=1 as kernel parameter kind of works: I can switch via Alt+F9 to a shell when systemd boot hangs. But this shell is quite impossible because an animated [ *** ] A ...
maxschlepzig's user avatar
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7 votes
1 answer
8k views

All the following commands run in my debian terminal. ls /dev |grep ptmx /dev/ptmx ls /dev/pts 0 1 ptmx What is the difference between /dev/ptmx and /dev/pts/ptmx? ls /dev/tty* |sort /dev/tty ...
scrapy's user avatar
  • 353
4 votes
2 answers
905 views

Linux has 7 virtual consoles, which correspond to 7 device files /dev/tty[n]. Is a virtual console running as a process, just like a terminal emulator? (I am not sure. It seems a virtual console is ...
Tim's user avatar
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0 votes
2 answers
3k views

There are a large variety of questions floating around the 'net from people who want to watch the output of dmesg in real time. All the suggestions and answers involve using dmesg -w, tail, journalctl ...
i336_'s user avatar
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5 votes
3 answers
2k views

I've been trying to understand the /dev/console device, but there are a few things I'm not clear on: What is the purpose of this device? From what I can gather it's just a place for the kernel to ...
shwoseph's user avatar
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3 votes
1 answer
2k views

In linux I can use the key combinations Alt-Ctrl-F1,Alt-Ctrl-F2... to switch to different tty1 as I could use man chvt. using the command tty I also get displayed the teletype/linux virtual console I ...
fraleone's user avatar
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2 votes
1 answer
1k views

I've learned that this command: echo -e "\a" triggers a beep on the local system, whereas this command: echo -e "\a" >/dev/console triggers a beep on a remote system. Why is this? What is the &...
McErroneous's user avatar
  • 29
2 votes
2 answers
1k views

man 7 daemon When a traditional SysV daemon starts, it should execute the following steps as part of the initialization. Note that these steps are unnecessary for new-style daemons (see ...
sourcejedi's user avatar
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