Most Popular
1500 questions
46
votes
5 answers
Why are many admins using 'Turn off Automatic Root Certificates Update' Policy?
My company distributes a Windows Installer for a Server based product. As per best practices it is signed using a certificate. In line with Microsoft's advice we use a GlobalSign code signing certificate, which Microsoft claims is recognised by…
Jeroen Ritmeijer
- 727
46
votes
9 answers
How can I stop ansible from writing passwords to the logfiles?
I am setting up a MySQL server and want Ansible to set the mysql-root password during installation.
With the help of the internet I came up with this solution:
- name: Set MySQL root password before installing
debconf: name='mysql-server'…
claus
- 681
46
votes
2 answers
Is it possible to restrict the use of a root certificate to a domain
My customer uses a self signed certificate for an application to work. To be able to work, I have to install the root certificate they used to sign the certificate.
Is it possible to configure a root certificate so it only validates towards one…
MichaelD
- 595
46
votes
8 answers
High CPU utilization but low load average
We are running into a strange behavior where we see high CPU utilization but quite low load average.
The behavior is best illustrated by the following graphs from our monitoring system.
At about 11:57 the CPU utilization goes from 25% to 75%. The…
K Erlandsson
- 705
46
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
- 1,167
- 3
- 17
- 37
46
votes
4 answers
Using CNAME to point to another domain to save IP addresses
I have one server which I'm hosting a handful of sites on.
Currently, each site has it's domain hosted by an independent provider and each has an A record pointing to the server's IP address.
But if I want to change the server in the future, I will…
wows
- 575
46
votes
13 answers
Physically Identify the failed hard drive
So, let's say your server had 6 healthy hard drives. A drive fails (will not mount/detect, drops out of raid with errors) or is failing (SMART getting worse, etc). You need to swap out the bad drive. When you open the case you see.. six identical…
privatehuff
- 1,141
46
votes
12 answers
Sell partitioning to me
I have often wondered why there is such a passion for partitioning drives, especially on Unixy OSes (/usr, /var, et al). This does not seem to be a common theme with Windows installations.
It seems that partitioning greatly increases the likelihood…
46
votes
1 answer
unable to write to mount point (nfs-server), getting "Permission denied"
I'm trying to configure NFS between two RHEL7 nodes:
first node:
[root@ip-10-164-175-246 ~]# cat /etc/redhat-release
Red Hat Enterprise Linux Server release 7.0 (Maipo)
[root@ip-10-164-175-246 ~]# rpm -q…
alexus
- 13,667
46
votes
6 answers
Is it safe for a production server to have make installed?
During the setup of my virtual server instances I require some applications to be built using make. Are there any security risks associated with having make installed? Or should I clean it up before the instance is deployed?
I also have the gcc…
S-K'
- 1,311
46
votes
2 answers
postgres server fails to start, produces no log, how to to troubleshoot?
I'm starting up a postgres 9.3 instance on a ubuntu 12.04 server :
~# service postgresql start
* The PostgreSQL server failed to start. Please check the log output.
[fail]
the…
Boutran
- 581
46
votes
3 answers
How do I know if a DLL is registered?
When you are registering a DLL in old machines (Windows XP), regsrv always says that the registration was sucessful. This happens even if the user doesn't have permission to register.
With the name of the dll, is there a command that I can run at…
neves
- 1,320
46
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
- 861
46
votes
2 answers
How do I enable additional debugging output from Ansible and Vagrant?
I am investigating Ansible for server and application provisioning. My application is currently provisioned with shell scripts in Vagrant. Rather than rewriting my scripts, I took a sample and attempted to deploy it.
It appears to deploy fine, but I…
Brian Lyttle
- 1,787
46
votes
4 answers
Setting Nginx to catch all unhandled vhosts
If I already have a bunch of virtualhosts, how can I create a virtual host to handle requests that don't match any of the virtualhosts? (i.e. access by IP, another domain linking to IP, .etc .etc)
SandyD
- 571