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1500 questions
315
votes
21 answers
How can I use environment variables in Nginx.conf
I have a docker container running Nginx, that links to another docker container. The host name and IP address of the second container is loaded into the Nginx container as environment variables on startup, but is not know before then (it's dynamic).…
Hugo Rodger-Brown
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310
votes
5 answers
How to send ctrl+alt+del using Remote Desktop?
How can I send ctrl+alt+del to a remote computer over Remote Desktop?
For example, if I wanted to change the local admin password on a remote PC using a Remote Desktop connection, it would be helpful to be able to send the ctrl+alt+del key sequence…
T. Marshall
- 3,203
- 2
- 15
- 8
309
votes
4 answers
What are the functional differences between .profile .bash_profile and .bashrc
What are the functional differences between the .profile, .bash_profile and .bashrc files?
lollercoaster
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308
votes
21 answers
Can I automatically add a new host to known_hosts?
Here's my situation: I'm setting up a test harness that will, from a central client, launch a number of virtual machine instances and then execute commands on them via ssh. The virtual machines will have previously unused hostnames and IP…
gareth_bowles
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300
votes
8 answers
How to bind MySQL server to more than one IP address?
Is there a secret way to bind MySQL to more than one IP address?
As far as I can see the bind-address parameter in the my.cnf does not support more than one IP and you can't have it more than once.
BlaM
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292
votes
4 answers
How do I select which Apache MPM to use?
This is a Canonical Question about selecting the right Apache httpd MPM.
I'm a little confused between the different MPMs offered by Apache - 'worker', 'event', 'prefork', etc.
What are the major differences between them, and how can I decide…
Tiffany Walker
- 6,491
- 13
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291
votes
14 answers
What's the command-line utility in Windows to do a reverse DNS look-up?
Is there a built-in command line tool that will do reverse DNS look-ups in Windows? I.e., something like w.x.y.z => mycomputername
I've tried:
nslookup: seems to be forward look-up only.
host: doesn't exist
dig: also doesn't exist.
I…
alastairs
- 3,045
- 3
- 17
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290
votes
5 answers
How to set environment variable in systemd service?
I have an Arch Linux system with systemd and I've created my own service. The configuration service at /etc/systemd/system/myservice.service looks like this:
[Unit]
Description=My…
lfagundes
- 3,003
- 2
- 13
- 6
281
votes
160 answers
Useful Command-line Commands on Windows
The aim for this Wiki is to promote using a command to open up commonly used applications without having to go through many mouse clicks - thus saving time on monitoring and troubleshooting Windows machines.
Answer entries need to…
dance2die
- 1,961
- 7
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278
votes
45 answers
What are the obstacles to providing reliable Internet access and Wi-Fi at large tech conferences?
Every tech conference I've ever been to, and I've been to a lot, has had absolutely abysmal Wi-Fi and Internet access.
Sometimes it's the DHCP server running out of addresses. Sometimes the backhaul is clearly inadequate. Sometimes there's one…
Joel Spolsky
- 3,686
- 4
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- 19
278
votes
4 answers
Why do I need Nginx and something like Gunicorn?
I'm looking for an overly simplified answer to the following question. I'm trying to build a foundational understanding of how Nginx works alongside something like Gunicorn.
Do I need both Nginx and something like Gunicorn to deploy Django apps on…
a.m.
- 2,885
- 3
- 13
- 6
278
votes
13 answers
Can I nohup/screen an already-started process?
I'm doing some test-runs of long-running data migration scripts, over SSH. Let's say I start running a script around 4 PM; now, 6 PM rolls around, and I'm cursing myself for not doing this all in screen.
Is there any way to "retroactively" nohup a…
ojrac
- 2,883
- 3
- 16
- 5
276
votes
5 answers
Redirect, Change URLs or Redirect HTTP to HTTPS in Apache - Everything You Ever Wanted to Know About mod_rewrite Rules but Were Afraid to Ask
This is a Canonical Question about Apache's mod_rewrite.
Changing a request URL or redirecting users to a different URL than the one they originally requested is done using mod_rewrite. This includes such things as:
Changing HTTP to HTTPS (or the…
Kyle Brandt
- 81,077
- 70
- 299
- 442
272
votes
6 answers
How to assign permissions to ApplicationPoolIdentity account
In IIS 7 on Windows Server 2008, application pools can be run as the "ApplicationPoolIdentity" account instead of the NetworkService account.
How do I assign permissions to this "ApplicationPoolIdentity" account. It does not appear as a local user…
Triynko
- 3,398
- 6
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270
votes
7 answers
Check if port is open or closed on a Linux server?
How can I check if a port is listening on a Linux server?
James Anderson
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