Server Fault Stack Exchange
Server Fault Stack Exchange

Most Popular

more tags
1500 questions
250
votes
14 answers

What is this very short power cable called?

I have a couple of networking components in my rack that take giant AC adapters ("power bricks") that don't fit neatly into my rackmount PDU. I have one "thingy" that is shown below, and I need to buy a few more. But I have no idea what I'm…
Portman
  • 5,289
247
votes
7 answers

How do I view the details of a digital certificate .cer file?

I am using Windows and have been given a .cer file. How can I view the details of it?
yazz.com
  • 7,483
245
votes
13 answers

Environment variables of a running process on Unix?

I need to troubleshoot some problems related to environment variables on a Unix system. On Windows, I can use a tool such as ProcessExplorer to select particular a process and view values of each environment variable. How can I accomplish the same…
Gant
  • 2,595
245
votes
17 answers

df in linux not showing correct free space after file removal

I have file servers which are used to store files. Files might reside there for a week, or for a year. Unfortunately, when I remove files from the server, df command doesn't reflect the freed up space. So eventually, the server gets filled up (df…
user11350
244
votes
10 answers

How to tell which local branch is tracking which remote branch in Git?

I would like to know if there's a way to tell which local branch is tracking which remote branch in Git. I'm using one remote server, which is named "origin".
PJ.
  • 3,027
243
votes
10 answers

How to run a command multiple times, using bash shell?

Is there a way to run a command (e.g. ps aux|grep someprocess) for n times? Something like: run -n 10 'ps aux|grep someprocess' I want to use it interactively. Update: The reason I am asking this is, that I do work on a lot of machines and I don't…
mahatmanich
  • 2,984
  • 3
  • 23
  • 23
242
votes
11 answers

How to use Let's Encrypt DNS-01 challenge validation?

Let's Encrypt has announced they have: Turned on support for the ACME DNS challenge How do I make ./letsencrypt-auto generate a new certificate using DNS challenge domain validation? EDIT I mean: How do I avoid http/https port binding, by using…
Pierre Prinetti
  • 2,555
239
votes
10 answers

How do I share a Git repository with multiple users on a machine?

I have a Git repository on a staging server which multiple developers need to be able to pull to. git-init seems to have a flag very close to what I'm looking for: --shared, except I'd like multiple people to pull to that repository, as well. The…
Andrey Fedorov
  • 2,119
  • 4
  • 16
  • 12
237
votes
7 answers

How to force or redirect to SSL in nginx?

I have a signup page on a subdomain like: https://signup.example.com It should only be accessible via HTTPS but I'm worried people might somehow stumble upon it via HTTP and get a 404. My html/server block in nginx looks like this: html { server…
Callmeed
  • 2,715
236
votes
29 answers

Using DD for disk cloning

There's been a number of questions regarding disk cloning tools and dd has been suggested at least once. I've already considered using dd myself, mainly because ease of use, and that it's readily available on pretty much all bootable Linux…
falstro
  • 2,775
235
votes
3 answers

How do I do 'mount --bind' in /etc/fstab?

I'm trying to add mount --bind /proc/ /chroot/mysql/proc to /etc/fstab. How can I do this?
Some Linux Nerd
  • 3,467
  • 3
  • 20
  • 23
234
votes
4 answers

What's the best way of handling permissions for Apache 2's user www-data in /var/www?

Has anyone got a nice solution for handling files in /var/www? We're running Name Based Virtual Hosts and the Apache 2 user is www-data. We've got two regular users & root. So when messing with files in /var/www, rather than having to... chown -R…
Gareth
  • 8,573
234
votes
3 answers

What is the difference between Unix sockets and TCP/IP sockets?

It's from this answer: https://stackoverflow.com/questions/2482411/is-this-pdo-bug-fixed-now/2482424#2482424 When the host is "localhost", MySQL Unix clients use a Unix socket, AKA Unix Domain Socket, rather than a TCP/IP socket for the connection,…
apache
  • 3,347
  • 7
  • 28
  • 25
233
votes
4 answers

Symlink not updating as expected when using an absolute with relative path

I am trying to use symbolic links. I did some reading and found the following commands: Creation -> ln -s {/path/to/file-name} {link-name} Update -> ln -sfn {/path/to/file-name} {link-name} Deletion -> rm {link-name} Creations and deletions work…
Jérôme Verstrynge
  • 4,787
233
votes
19 answers

In my /etc/hosts/ file on Linux/OSX, how do I do a wildcard subdomain?

I need to test sub-domains on my localhost. How can I effectively have this result of adding *.localhost.com to my /etc/hosts/ file? If it's not possible, how do I work around this problem? I need to test wildcard sub-domains on my localserver. …
MikeN
  • 8,502
  • 5
  • 23
  • 18
1 2 3
…
99 100