User Stéphane Chazelas

509 votes

6 answers

100k views

Why not use "which"? What to use then?

asked Aug 1, 2013 at 22:58

282 votes

3 answers

57k views

Security implications of forgetting to quote a variable in bash/POSIX shells

asked Dec 3, 2014 at 21:59

127 votes

9 answers

13k views

On what systems is //foo/bar different from /foo/bar?

asked Jan 20, 2016 at 10:20

49 votes

1 answer

14k views

What's wrong with var=$(</dev/stdin) to read stdin into a variable?

asked Sep 7, 2022 at 8:22

46 votes

1 answer

8k views

Why the "-" in the "#! /bin/sh -" shebang?

asked Mar 15, 2017 at 21:39

33 votes

2 answers

3k views

Security implications of running perl -ne '...' *

asked Nov 26, 2014 at 8:15

30 votes

4 answers

8k views

How can we know who's at the other end of a pseudo-terminal device?

asked Jun 11, 2014 at 20:12

29 votes

2 answers

7k views

How to execute an arbitrary simple command over ssh without knowing the login shell of the remote user?

asked May 25, 2015 at 20:11

29 votes

4 answers

2k views

How to safely use gawk's -i option or @include directive?

asked Jun 23, 2023 at 10:28

26 votes

2 answers

4k views

find . -print0 | xargs -0 cmd vs find . -exec cmd {} +

asked Jan 7, 2023 at 10:55

23 votes

6 answers

8k views

Get the display width of a string of characters

asked Nov 23, 2015 at 21:02

23 votes

3 answers

5k views

find out which file descriptors share the same "open file description"

asked Mar 23, 2015 at 11:51

21 votes

2 answers

2k views

Command to retrieve the list of characters in a given character class in the current locale

asked May 6, 2014 at 20:23

21 votes

1 answer

1k views

Slurp-mode in awk?

asked Aug 19, 2016 at 12:20

20 votes

1 answer

2k views

Why does unbuffer -p mangle its input?

asked Oct 29, 2023 at 15:20

19 votes

1 answer

3k views

How to use associative arrays safely inside arithmetic expressions?

asked Jan 4, 2021 at 15:12

19 votes

2 answers

2k views

explanation on chown(1) POSIX spec

asked Jun 14, 2014 at 8:06

19 votes

6 answers

6k views

Store output of a command into a ring-buffer

asked Aug 4, 2014 at 10:25

17 votes

1 answer

4k views

How to log all system calls made by a process and all its descendants with auditd

asked Oct 30, 2014 at 12:35

12 votes

2 answers

12k views

Equivalent of "truss -T" and "truss -U" on Linux?

asked Jun 21, 2013 at 11:57

10 votes

1 answer

543 views

How to display the non-sparse parts of a sparse file?

asked Mar 26, 2014 at 15:05

9 votes

2 answers

1k views

xtrace equivalent in the fish shell

asked Nov 16, 2015 at 15:04

9 votes

1 answer

853 views

On what UNIX-like system / filesystem is the st_blocks field returned by stat() not a number of 512-byte units?

asked Sep 18, 2021 at 7:02

9 votes

3 answers

6k views

How to process JSON with strings containing invalid UTF-8

asked Sep 30, 2023 at 13:40

8 votes

2 answers

8k views

booting qemu/kvm directly from a file system

asked Oct 29, 2012 at 22:42

8 votes

3 answers

3k views

Is it possible to tell Xorg not to listen on the abstract socket

asked Feb 3, 2014 at 15:48

7 votes

1 answer

811 views

select() / poll() timeout stretches on Linux

asked Jun 21, 2024 at 12:26

7 votes

2 answers

1k views

Why does $((0.1)) expand to 0.10000000000000001 in zsh?

asked Feb 5, 2018 at 20:56

6 votes

0 answers

996 views

What chunks are mismatched in a Linux md array?

asked Jan 20, 2016 at 12:23

6 votes

2 answers

1k views

sort all arrays in a JSON file depth-first to get a consistent order

asked Apr 27, 2024 at 6:16

Stack Exchange Network

32 Questions

Why not use "which"? What to use then?

Security implications of forgetting to quote a variable in bash/POSIX shells

On what systems is //foo/bar different from /foo/bar?

What's wrong with var=$(</dev/stdin) to read stdin into a variable?

Why the "-" in the "#! /bin/sh -" shebang?

Security implications of running perl -ne '...' *

How can we know who's at the other end of a pseudo-terminal device?

How to execute an arbitrary simple command over ssh without knowing the login shell of the remote user?

How to safely use gawk's -i option or @include directive?

find . -print0 | xargs -0 cmd vs find . -exec cmd {} +

Get the display width of a string of characters

find out which file descriptors share the same "open file description"

Command to retrieve the list of characters in a given character class in the current locale

Slurp-mode in awk?

Why does unbuffer -p mangle its input?

How to use associative arrays safely inside arithmetic expressions?

explanation on chown(1) POSIX spec

Store output of a command into a ring-buffer

How to log all system calls made by a process and all its descendants with auditd

Equivalent of "truss -T" and "truss -U" on Linux?

How to display the non-sparse parts of a sparse file?

xtrace equivalent in the fish shell

On what UNIX-like system / filesystem is the st_blocks field returned by stat() not a number of 512-byte units?

How to process JSON with strings containing invalid UTF-8

booting qemu/kvm directly from a file system

Is it possible to tell Xorg not to listen on the abstract socket

select() / poll() timeout stretches on Linux

Why does $((0.1)) expand to 0.10000000000000001 in zsh?

What chunks are mismatched in a Linux md array?

sort all arrays in a JSON file depth-first to get a consistent order