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Rick
  • Member for 7 years, 5 months
  • Last seen more than a week ago
29 votes
1 answer
3k views

Why would /etc/passwd be used every time someone executes `ls -l` command?

12 votes
5 answers
7k views

Why telnet is considered to be a protocol? Isn't it just a simple TCP send/echo program?

11 votes
2 answers
57k views

What is interrupted system call?

9 votes
2 answers
3k views

POSIX Programmer's Manual vs Linux Programmer's Manual

5 votes
1 answer
7k views

Why ssh fingerprint now is given in base64 format instead of hex?

5 votes
1 answer
7k views

Why do I have libc.so.6 under /usr/lib/x86_64-linux-gnu directory?

3 votes
1 answer
1k views

Problems when test whether standard input is capable of seeking

2 votes
1 answer
451 views

Two(≥2) signal handlers execution order when one is interrupted by another?

2 votes
2 answers
1k views

What is lazy swap reservation?

2 votes
1 answer
329 views

Does it have 3 levels of buffering, or 2 levels of buffering, when using stdio library?

2 votes
2 answers
3k views

select would indicate pipe is readable when there's no data in pipe and write end is closed?

2 votes
1 answer
898 views

Is there any authoritative place that says multi processes or threads accepting a listening socket is an atomic operation?

2 votes
1 answer
5k views

ls --color=auto, why they offer such an option since there is --color=always by default?

2 votes
1 answer
4k views

What is the use case of -f (dash f, flag f) of ssh command?

2 votes
3 answers
5k views

Anyone still use or be familiar with the rz and sz command?

1 vote
1 answer
505 views

How to know if I am in a screen of a screen?

1 vote
1 answer
213 views

On some UNIX implementations, it is not possible to call free() on a block of memory allocated via memalign()

1 vote
0 answers
31 views

How do I preview a unix document file? [duplicate]

1 vote
1 answer
3k views

top command, why such a big difference between VIRT and RES, while swap is 0?

1 vote
1 answer
583 views

Does a shell which does not support job control has the concept of foreground and background processes?

0 votes
1 answer
51 views

What does "whether synchronized I/O can be used with the associated file" mean?

0 votes
0 answers
223 views

How does 200 million function call of fgets translate into only 25,224 system calls?

0 votes
2 answers
2k views

What does the Unix login program/command do?

0 votes
1 answer
209 views

How does a telnet BBS work?

0 votes
1 answer
402 views

getaddrinfo(), I can specify a service without a host, what does it mean?

0 votes
1 answer
45 views

How do I view a command's information? [duplicate]

0 votes
1 answer
451 views

How does apt install -t distinguish one source from another?

0 votes
1 answer
631 views

What is ssh -L 123:farawayhost:456 remotehost?