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1500 questions
57
votes
8 answers
How can I find current SSH protocol version of the current connection?
I connect to a Linux machine (CentOS 6.4) using PuTTY. Except from fact that I can set PuTTY to only use one type of protocol, how can I find the current SSH connection's version (SSH1 or SSH2)?
codiac
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57
votes
4 answers
Relationship between Vagrant, Docker, Chef and OpenStack (or similar products)?
I am a web developer, but I am also interested in a few administrative tasks. Hence, the new move from pure administration to dev-ops comes handy for me.
Anyway, I have some problems to put a few things into a relationship. Maybe there isn't any, so…
Golo Roden
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57
votes
2 answers
vSphere education - What are the downsides of configuring VMs with *too* much RAM?
VMware memory management seems to be a tricky balancing act. With cluster RAM, Resource Pools, VMware's management techniques (TPS, ballooning, host swapping), in-guest RAM utilization, swapping, reservations, shares and limits, there are a lot of…
ewwhite
- 197,159
- 92
- 443
- 809
57
votes
6 answers
Where does UFW (uncomplicated firewall) save command-line rules to?
You add a rule like this:
ufw allow 22/tcp
The rule is saved, and is applied even after reboot. But it's not written anywhere in /etc/ufw. Where is it saved to? (Ubuntu, using ufw as pre-installed.)
Steve Bennett
- 5,750
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57
votes
11 answers
Unable to install .net 3.5 on Windows server 2012
I am trying to install .Net 3.5 on Windows Server 2012 and it constantly keeps failing. I am using "Add or Remove Features" and my Internet is already there. I've read that if alternate source couldn't be found, the installer tries to download…
Tim Tom
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57
votes
4 answers
nginx proxy pass redirects ignore port
So I'm setting up a virtual path when pointing at a node.js app in my nginx conf. the relevant section looks like so:
location /app {
rewrite /app/(.*) /$1 break;
proxy_pass http://localhost:3000;
proxy_redirect off;
proxy_set_header Host…
Paul
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57
votes
3 answers
Do I need to refresh or restart anything after I add/update a crontab in Ubuntu Server 8.04?
When you change something in Apache you need to reload or restart apache. Does anything need to be refreshed or restarted in Ubuntu Server 8.04 after I add/update the crontab? Thanks a bunch for your help.
RayJamesFun
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57
votes
2 answers
Ubuntu Server message says packages can be updated, but apt-get does not update any
Possible Duplicate:
updates in amazon-ec2 ubuntu 10.04 server
When I log into an Ubuntu 10.04.2 LTS server, I see the message:
42 packages can be updated.
18 updates are security updates.
But when I try to update this, nothing gets upgraded as…
Mike T
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57
votes
8 answers
how to restart/clear memcache without restarting the whole web server?
/opt/eduserver/eduserver gives me options:
Usage: /opt/eduserver/eduserver
{start|stop|startphp|startwww|startooo|stopphp|stopwww|stopooo|restartphp|restartwww|restartooo|status|restart|reload|force-reload}
where memcache is php module there is…
Radek
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57
votes
6 answers
What's the best fire suppression for a server room?
What is the state of the art in fire suppression for server rooms? What are the top priorities in choosing a good system?
Dennis Williamson
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57
votes
10 answers
How can I find the biggest directories in Unix / Ubuntu?
Is there a way in Unix to see the biggest directories on disk?
I need to know why I'm almost out of space on the server,= and I don't know where most of the space is used.
aneuryzm
- 1,714
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57
votes
6 answers
How do I print contents of at jobs?
I have a Debian box with some jobs scheduled using at. I know I can list the jobs with their times using atq, but is there any way to print out their contents, apart from peeking into /var/spool/cron/atjobs?
che
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57
votes
6 answers
how to split a pcap file into a set of smaller ones
I have a huge pcap file (generated by tcpdump). When I try to open it in wireshark, the program just gets unresponsive. Is there a way to split a file in set of smaller ones to open them one by one?
The traffic captured in a file is generated by two…
facha
- 1,368
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56
votes
1 answer
Pros and cons of using Windows containers instead of Linux containers for Docker?
I'm installing Docker for Windows (CE) on Windows 10 and the first screen asks me:
[ ] Use Windows containers instead of Linux containers (this can be changed after installation)
This seems an important decision, yet the Docker documentation, FAQ…
Duncan Jones
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56
votes
5 answers
systemd service automatic restart after StartLimitInterval
I want my systemd service to be automatically restarted on failure. Additionally I want to rate limit the restarts. I want to allow maximum of 3 restarts within 90 seconds duration. Hence I have done the following configuration.
[Service] …
Dinesh P.R.
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- 7