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1500 questions
84
votes
8 answers
Apache2 config variable is not defined
I installed apache2 on ubuntu 13.10.
If I try to restart it using
sudo /etc/init.d/apache2 restart
I get this message:
AH00558: apache2: Could not reliably determine the server's fully qualified domain name, using 127.0.1.1. Set the 'ServerName'…
Kurt Bourbaki
- 943
84
votes
4 answers
nginx url rewriting: difference between break and last
I don't understand the difference between break and last (flags of rewrite). The documentation is rather abstruse. I've tried to switch between the two in some of my configs, but I couldn't spot any difference in behavior. Can someone please explain…
user39883
83
votes
13 answers
How can I run arbitrarily complex command using sudo over ssh?
I have a system that I can only log in to under my username (myuser), but I need to run commands as other user (scriptuser). So far, I have come up with the following to run the commands I need:
ssh -tq myuser@hostname "sudo -u scriptuser bash -c…
VoY
- 1,295
- 2
- 11
- 9
83
votes
7 answers
How to specify hostname for the running container?
I'm having trouble setting the hostname on a running docker container. I'm also having trouble understanding how to specify hostname after the image is started.
I started a container from an image I downloaded:
sudo docker run -p 8080:80 -p 2222:22…
Miguel Ping
- 955
83
votes
7 answers
Why use Chef/Puppet over shell scripts?
New to Puppet and Chef tools. Seems like the job that they are doing can be done with shell scripting. Maybe it was done in shell scripts until these came along.
I would agree they are more readable. But, are there any other advantages over shell…
resting
- 1,059
83
votes
7 answers
Log all commands run by admins on production servers
It is company policy for admins to login to the servers via a personal username, and then run sudo -i to become root. Upon running sudo -i, sudo will create an environmental variable called SUDO_USER, which contains the original user's username.
Is…
Soviero
- 4,426
83
votes
11 answers
Private IP address in public DNS
We have an SMTP only mail server behind a firewall which will have a public A record of mail.. The only way to access this mail server is from another server behind the same firewall. We do not run our own private DNS server.
Is it a good idea to…
Geoff Dalgas
- 2,566
83
votes
4 answers
Running Cron every 2 hours
I have the cron job as shown below, and wanted it to run every 2 hours, but it keeps running every 2 minutes.
Can someone tell me where I'm going wrong?
* */2 * * * /path-to-script
Helen
- 963
83
votes
3 answers
How to ensure OpenVPN connection uses specific DNS?
I'm using OpenVPN through Tunnelblick on MacOS X Lion.
I need to set specific DNS (with local IP, which works only when VPN is up) for the duration of this VPN session only.
I do not have access to the OpenVPN server configuration. Only client…
83
votes
1 answer
What does "debconf: delaying package configuration, since apt-utils is not installed" mean?
I have just installed Debian and I was just installing some packages using apt-get instal when I saw this message:
debconf: delaying package configuration, since apt-utils is not installed
What does this mean? And once I have installed apt-utils…
David
- 1,077
83
votes
9 answers
How to restart Nginx on Mac OS X?
I just installed Nginx on Mac OS X (thanks http://www.kevinworthington.com/nginx-mac-os-snow-leopard-2-minutes/), but how do I restart Nginx on Mac OS X?
Thanks!
Laura Brown
- 863
- 1
- 7
- 5
83
votes
7 answers
OpenVPN vs. IPsec - Pros and cons, what to use?
Interestingly I have not found any good search results when searching for "OpenVPN vs IPsec". So here's my question:
I need to set up a private LAN over an untrusted network. And as far as I know, both approaches seem to be valid. But I do not know…
jens
- 1,003
83
votes
16 answers
Hundreds of failed ssh logins
Every night I get hundreds, sometimes thousands, of failed ssh logins on my RedHat 4 server. For firewall reasons from remote sites, I need to run on the standard port. Is there anything I should be doing to block this. I notice that many come from…
MattMcKnight
- 932
83
votes
13 answers
How does a team of Systems Administrators share passwords securely?
What are best practices for sharing hundreds of passwords among a few people? These passwords protect mission critical data, and cannot ever be visible beyond a small team.
Chris Henry
- 1,572
83
votes
10 answers
How to check what port mysql is running on
On my windows dev box mysql is running on port 3306
How can I check what port it is running on the unix server that I have to upload the app to.
Ankur
- 2,389