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1500 questions
45
votes
6 answers

View the SSL certificate of a page that immediately redirects to another

So I've googled quite a bit for this but it appears that my google-fu fails me - apologies if this is a trivial and already answered question, I could not find anything about this I'm trying to diagnose an SSL certificate hostname mismatch. When I…
Robert Petz
  • 575
45
votes
5 answers

How do I install the JRE on a Windows server without Oracle adware?

I would like to install Java on one of our servers, but I am reticent due to Oracle's bundling of an Ask.com toolbar and some virus scanner. I've read that the java updater even installs these for important security fixes if they are missing, and…
Jason Goemaat
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45
votes
7 answers

Removing an (apparently) infinitely recursive folder

Somehow, one of our old Server 2008 (not R2) boxes has developed a seemingly infinitely-recursing folder. This is playing havock with our backups, as the backup agent tries to recurse down into the folder and never returns. The folder structure…
KenD
  • 1,147
45
votes
3 answers

Why multiple PTR records in DNS is not recommended?

I often read that using multiple PTR records in a DNS configuration is not recommended. However, the reasons are often vague, or not so obvious, naming: "it can cause problems", "can trigger bugs in programs expecting a single answer": it's the…
Totor
  • 2,996
45
votes
1 answer

Understanding the nginx proxy_cache_path directive

Suppose I have this nginx config file proxy_cache_path /var/cache/nginx levels=1:2 keys_zone=myCache:8m max_size=100m inactive=1h; What does the keys_zone=myCache:8m mean? There's not much said to it in the docs: In addition, all active keys and…
Jürgen Paul
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45
votes
7 answers

du vs. df difference

I have a fileserver where df reports 94% of / full. But according to du, much less is used: # df -h / Filesystem Size Used Avail Use% Mounted on /dev/sda3 270G 240G 17G 94% / # du -hxs / 124G / I read that open but…
Andreas Kuntzagk
  • 821
45
votes
6 answers

ssh tunneling only access

Is it possible to configure ssh (on linux) to allow access for tunneling only? Ie user can setup tunnels but cannot get a shell/access files?
Second
  • 683
45
votes
5 answers

Rsync command issues, owner and group permissions doesn´t change

I´m trying to set owner and group via rsync and it doesn't seem to be working. This is the command: sudo rsync -rlptDvz --owner=cmsseren --group=cmsseren /home/serena/public_html/ -e ssh root@ip:/home/cmsseren/public_html2/ The files sync correctly…
Arnoldo Bazaldua
  • 549
45
votes
4 answers

Create new vsftpd user and lock to (specify) home / login directory

I need to periodically give temporary and limited access to various directories on a CentOS linux server that has vsftp installed. I've created a user using useradd [user_name] and given them a password using passwd [password]. I've created a…
zigojacko
  • 1,463
45
votes
3 answers

What is the difference between IDRAC, IPMI and ILO?

I sometimes hear my colleagues talking about iDRAC, IPMI and iLO, when restarting a server. It seems that those terms are often misused. For instance, is there a difference between saying that you connect to IPMI and iDRAC? If I well-understand,…
Virtuose
  • 587
45
votes
6 answers

how to solve the "open failed: administratively prohibited: open failed" when using a SSH tunnel proxy

I've been using SSH tunnel for a while on Windows (using Putty). On Windows with putty, it is always fine, but on mac or cygwin, it sometimes prompts the warning message: open failed: administratively prohibited: open failed
AGamePlayer
  • 785
45
votes
11 answers

Does an unplugged hard drive used for data archival deteriorate?

If I were to archive data on a hard drive, unplug it, and set it on a (not dusty, temperature-controlled) shelf somewhere, would that drive deteriorate much? How does the data retention of an unplugged hard drive compare to tapes?
Jim Hunziker
  • 1,862
45
votes
1 answer

HP ProLiant DL360 G7 hangs at "Power and Thermal Calibration" screen

I have a new HP ProLiant DL360 G7 system that is exhibiting a difficult-to-reproduce issue. The server randomly hangs at the "Power and Thermal Calibration in Progress..." screen during the POST process. This typically follows a warm-boot/reboot…
ewwhite
  • 198,150
45
votes
2 answers

Run Elevated Powershell prompt from command-line

Is there a way to run a Powershell Prompt with Elevated privileges from a command linein Server 2012? Problem is this is 'Minimal Server Interface' mode without full server-gui installed so I can run powershell from only either the command prompt or…
NickC
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45
votes
3 answers

Why is Linux reporting "free" memory strangely?

This is a canonical question about how Unix operating systems report memory usage. Similar Questions: Server refuses to use swap partition Memory Usage in LINUX I have production server that is running Debian 6.0.6 Squeeze #uname -a Linux…
user135199
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