Top new questions this week:

Server admin sent me a private key to use. Why?

I'm kind of new to ssh so forgive me if this is a stupid question. I'm supposed to be accessing a server in order to link a company's staging and live servers into our deployment loop. An admin over ...

/ ssh / security / key-authentication / administration

asked by Toby 63 votes answered by Wildcard 104 votes

Error in shell bracket test when string is a left-parenthesis

I used to be confident about the fact that quoting strings is always a good practice in order to avoid having the shell parsing it. Then I came across this: $ x='(' $ [ "$x" = '1' -a "$y" = '1' ] ...

/ shell / test

asked by Claudio 26 votes answered by Nominal Animal 25 votes

Is it possible to change the kernel in a UNIX/Linux system?

I wanted to know if it is possible to change kernels, for example, replacing Fedora's Linux kernel to that of FreeBSD's. Now, there already existed the Debian GNU/kFreeBSD. Is it possible for me to ...

/ linux / fedora / kernel / linux-kernel / gnu

asked by Switch 15 votes answered by Bratchley 20 votes

Why is this `grep -v` not functioning as expected?

I have a strange issue related to grep -v queries. Allow me to explain: To display connections I use who: $ who harry pts/0 2016-12-08 20:41 (192.168.0.1) james pts/1 2016-12-08 ...

/ command-line / grep / tty

asked by perhapsmaybeharry 10 votes answered by Stéphane Chazelas 17 votes

assign and inspect bash function metadata

I often generate and register a lot of bash functions that automate many of the task I usually do in my development projects. That generation depends on the meta-data of the project I am working on. ...

/ bash / function

asked by yucer 9 votes answered by AlexP 12 votes

Why is "who mil" allowed to produce no output?

In the 2016 edition of IEEE Std 1003.1-2008 (a.k.a. The Open Group Base Specifications Issue 7, or just the POSIX standard), the Rationale section of the who utility mentions the following: It is ...

/ history / posix / who

asked by Rhymoid 7 votes

Sudoers blacklist

We need to add few users to the sudoers file on Linux. They should be able to to anything root can except the following: Should not modify, read, delete /nfsshare/config Should not modify, read, ...

/ sudo / sudoedit

asked by sagar 6 votes answered by maulinglawns 17 votes

Greatest hits from previous weeks:

Create a symbolic link relative to the current directory

I'm trying to create a symbolic link in my home directory that points to a directory on my external HDD. It works fine when I specify it like this: cd ~ ln -s /run/media/name/exhdd/Data/ Data ...

/ directory / symlink / ln

asked by jcora 66 votes answered by Evan Teitelman 82 votes

Zip all files in directory?

Is there a way to zip all files in a given directory with the zip command? I've heard of using *.*, but I want it to work for extensionless files, too.

/ command-line / wildcards / zip

asked by tkbx 131 votes answered by derobert 211 votes

Can you answer these?

Understanding multiple network interfaces and routing using OpenWRT

I have a single board computer running OpenWRT (GW5100). I inserted a wireless module to connect to Verizon's LTE network that looks like this: After reading documentation from the manufacturer and ...

/ networking

asked by Dan Laks 3 votes

pnmixer doesn't work after installing pavucontrol

I'm using Manjaro Openbox and I tried to set up my microphone after the arch wiki I just changed in /etc/pulse/default.pa load-module module-alsa-source device=hw:0,0 # the line above should be ...

/ audio / alsa

asked by Revo86er 3 votes

Efficient window size manipulation

On Gnome, you can usually set a window to occupy half of the screen with super + arrow. Is there any way I can bind hotkeys to manipulate window sizes more flexibly? e.g. bind a key to make window ...

/ gnome / keyboard-shortcuts / window-management

asked by Woofas 2 votes