User Stephen Harris

215 votes

Accepted

Is your SSH password revealed when you attempt to connect to the wrong server?

ssh password

answered Sep 14, 2016 at 22:25

114 votes

Accepted

What does "set --" do in this Dockerfile entrypoint?

shell-script set

answered Sep 6, 2016 at 19:07

88 votes

Accepted

Crontab never running while in /etc/cron.d

debian cron

answered Jul 16, 2016 at 19:03

83 votes

Accepted

How to step-into, step-over and step-out with GDB?

debugging programming gdb

answered Jul 24, 2016 at 18:01

56 votes

Accepted

bash calc returns 800 (should be 600): echo "$(( 800 / (4 / 3) ))"

bash shell-script shell arithmetic

answered Feb 1 at 1:46

51 votes

Accepted

One file wants to belong to two users. How? Hard linking fails

permissions hard-link

answered Aug 17, 2016 at 16:22

43 votes

Processes in background without “&”

processes

answered Aug 24, 2016 at 21:24

41 votes

Accepted

How do programs output to elsewhere than STDOUT/STDERR? How to avoid it?

bash terminal io-redirection

answered Jul 15, 2016 at 11:31

38 votes

Accepted

How does `:w !sudo tee %` work

vim sudo tee

answered Aug 4, 2016 at 11:49

34 votes

Command which removes data left side of ";" (semicolon) on each row

text-processing awk sed grep regular-expression

answered Oct 19, 2019 at 0:30

32 votes

Accepted

Sort not sorting lines with a pipe '|' in it correctly

sort

answered Dec 12, 2018 at 0:04

31 votes

Why is a file with 400 permissions seen writable by root but read-only by user?

permissions test readonly

answered May 3, 2018 at 2:04

31 votes

What's the difference between eval and exec?

bash shell shell-builtin

answered Jul 19, 2016 at 12:50

30 votes

Accepted

Are /dev/{udp,tcp} standardized or available everywhere?

devices tcp udp portability

answered Sep 20, 2016 at 12:37

29 votes

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Why are quotes necessary for files argument when calling this Bash script?

bash shell-script

answered Aug 26, 2016 at 14:10

29 votes

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How to copy a directory which root can't access to a directory that only root can access?

permissions root file-copy

answered Aug 22, 2016 at 15:39

27 votes

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Unset `setcap` additional capabilities on excutable

linux capabilities

answered Aug 15, 2016 at 1:41

26 votes

Accepted

Arch Linux thinks I have about 16 gigs of ram when I only have 8

linux swap ram

answered Aug 14, 2016 at 22:49

26 votes

Accepted

How to label a newly created file with "system_u"?

rhel selinux

answered Jul 23, 2016 at 0:44

25 votes

Accepted

Why does one need a loop device at all?

filesystems mount block-device loop-device

answered Oct 17, 2018 at 15:39

24 votes

Accepted

Does Linux require Python?

linux python android distributions

answered Oct 10, 2018 at 18:59

23 votes

Accepted

Why does ping need setuid permission?

ping setuid

answered Jul 30, 2017 at 17:13

21 votes

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How do I grant different permissions for each user?

files permissions users group

answered Jul 26, 2016 at 14:35

20 votes

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How to print a specific column with awk on a remote ssh session?

ssh awk

answered Jul 8, 2016 at 14:59

20 votes

Accepted

How should I check whether a given PID is running?

process perl proc process-management

answered Jul 10, 2016 at 18:05

20 votes

Accepted

Why is $ the default symbol for a user shell and # the default symbol for a root shell?

shell prompt history

answered Jun 23, 2016 at 22:16

20 votes

Accepted

Creating a tmux session without attaching to it

tmux

answered Aug 21, 2016 at 20:21

20 votes

Accepted

How to ssh to servers internally by hostname without domain name?

ssh networking

answered Sep 22, 2016 at 0:14

19 votes

How to find lines that begin with **

text-processing grep quoting

answered Jun 23, 2016 at 18:15

19 votes

Accepted

Can OpenSSL decode base64 data that does not contain line breaks?

openssl base64

answered Jul 30, 2016 at 14:04

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735 Answers

Is your SSH password revealed when you attempt to connect to the wrong server?

What does "set --" do in this Dockerfile entrypoint?

Crontab never running while in /etc/cron.d

How to step-into, step-over and step-out with GDB?

bash calc returns 800 (should be 600): echo "$(( 800 / (4 / 3) ))"

One file wants to belong to two users. How? Hard linking fails

Processes in background without “&”

How do programs output to elsewhere than STDOUT/STDERR? How to avoid it?

How does `:w !sudo tee %` work

Command which removes data left side of ";" (semicolon) on each row

Sort not sorting lines with a pipe '|' in it correctly

Why is a file with 400 permissions seen writable by root but read-only by user?

What's the difference between eval and exec?

Are /dev/{udp,tcp} standardized or available everywhere?

Why are quotes necessary for files argument when calling this Bash script?

How to copy a directory which root can't access to a directory that only root can access?

Unset `setcap` additional capabilities on excutable

Arch Linux thinks I have about 16 gigs of ram when I only have 8

How to label a newly created file with "system_u"?

Why does one need a loop device at all?

Does Linux require Python?

Why does ping need setuid permission?

How do I grant different permissions for each user?

How to print a specific column with awk on a remote ssh session?

How should I check whether a given PID is running?

Why is $ the default symbol for a user shell and # the default symbol for a root shell?

Creating a tmux session without attaching to it

How to ssh to servers internally by hostname without domain name?

How to find lines that begin with **

Can OpenSSL decode base64 data that does not contain line breaks?