Greatest Hits
14
votes
4answers
44k views
How do I install an rpm that complains about rpmlib(FileDigests) <= 4.6.0-1?
Im trying to install an rpm file on CentOS 5 and Im not sure how to resolve this issues it brings up:
$ rpm --install epel-release-6-5.noarch.rpm
warning: epel-release-6-5.noarch.rpm: Header V3 ...
25
votes
4answers
61k views
How can I port forward with iptables?
I want connections coming in on ppp0 on port 8001 to route to 192.168.1.200 on eth0 on port 8080
I've got these two rules
-A PREROUTING -p tcp -m tcp --dport 8001 -j DNAT --to-destination ...
28
votes
14answers
45k views
Why does “Loading your personal settings” take forever?
I have come across dozens of user installations of Windows (XP) where, after logging in,
the system stays stuck on this screen for a very long time.
What are the possible causes?
How can I diagnose ...
38
votes
9answers
75k views
Creating a virtual machine in VirtualBox from a physical one
Is there any way to create a virtual machine that you can use in VirtualBox from a physical installation that you have? For instance, if I have Windows XP installed on a physical computer and want to ...
7
votes
7answers
61k views
How to create a service running a .bat file on Windows 2008 Server?
I've created the service using
sc create myService binpath=myservice.bat
But when I start it, it fails with the following error message:
[SC] StartService FAILED 1053:
The service did not ...
23
votes
11answers
42k views
Should I use my ISP's DNS, or Google's 8.8.8.8?
It seems like a good idea to use Google's public DNS 8.8.8.8 and 8.8.4.4 because it's really fast -- much faster than my own ISP's DNS! -- and probably more reliable, too. That seems like a ...
25
votes
14answers
41k views
What is a patch panel?
What is a patch panel? How it is different from (layer 2) switch?
EDIT:
I think my primary question (and confusion) is this:
Why don't network connections go straight to the switch?
Don't we still ...
27
votes
4answers
90k views
Is it possible to change an “Unidentified Network” into a “Home” or “Work” network on Windows 7
I have a problem with Windows 7 RC (7100).
I frequently use a crossover network cable on WinXP with static IP addresses to connect to various industrial devices (e.g. robots, pumps, valves or even ...
29
votes
2answers
16k views
How do VLANs work?
What are VLANs? What problems do they solve?
I'm helping a friend learn basic networking, as he's just become the sole sysadmin at a small company. I've been pointing him at various questions/answers ...
6
votes
1answer
45k views
What is a SQL Server instance?
When I install SQL Server 2008 Express in prompts me to create an instance and aborts if I don't. Then I see that information in an entry in Sql Server Configuration Manager on SQL Server Services. ...
37
votes
12answers
35k views
How to reconnect to a disconnected ssh session
Is there a way to connect to an ssh session that was disconnected? We are having problems with our network connection to a remote site that we are working on separately; however, in the mean time we ...
157
votes
14answers
55k views
Any benefit or detriment from removing a pagefile on an 8GB RAM machine?
I'm running Windows 7 on a dual core, x64 AMD with 8GB RAM.
Do I even need a pagefile?
Will removing it help or hurt performance?
Would it make a difference if this is a server or a desktop?
Does ...
30
votes
3answers
34k views
Is there a way to view the members of an Active Directory group if you aren't a domain admin and can't log into to a domain controller?
Is there a way to view the members of an Active Directory group if you aren't a domain admin and can't log into to a domain controller?
14
votes
4answers
38k views
Adding a directory to $PATH in CentOS?
We just got our new server(s) up and we're running CentOS on them all. After successfully installing Ruby Enterprise Edition, I would now like to add the REE /bin (located at ...
128
votes
11answers
38k views
Can I nohup/screen an already-started process?
I'm doing some test-runs of long-running data migration scripts, over SSH. Let's say I start running a script around 4 PM; now, 6 PM rolls around, and I'm cursing myself for not doing this all in ...
23
votes
9answers
67k views
Increase number of allowed remote desktop connections
Windows Server 2003 allows 2 non-console and one console remote desktop connections. Is there a way to increase the number of non-console sessions allowed?
13
votes
2answers
40k views
What are windows 7 N/KN/VL editions?
We're subscribed to MSDN at work and I've noticed that among the various windows "editions" there are downloads such as "Windows 7 Ultimate N" and "Windows 7 Ultimate N and KN".
What are these ...
40
votes
8answers
49k views
how to set global PATH on OS X?
I'd like to append to the global PATH variable on OS X so that all user shells and GUI applications get the same PATH environment.
I know I can append to the path in shell startup scripts, but those ...
1
vote
9answers
64k views
Can ping Exchange server, can't connect Outlook to it
I can ping the Exchange server here at work, but Outlook doesn't connect to it. I've verified the server is indeed the Exchange server and I've tried using the IP instead of the server name. I am also ...
10
votes
7answers
60k views
Problem adding Windows 7 64-bit print drivers to a 32-bit Windows 2003 print server
I have installed the final RTM version of Windows 7 Professional 64-bit on a test system before we begin the rollout in our company.
I'm having problems connecting to several HP printers that we have ...
11
votes
4answers
49k views
Is it possible to mount/unmount a physical hard drive in Windows XP?
Is it possible to mount/unmount a physical hard drive in Windows XP?
Ideally, I'd like to be able to do this from the command line so that I could have batch files to do it, ie: mount.cmd unmount.cmd
...
47
votes
10answers
23k views
How do diff over ssh?
How do I diff files/folders across machines provided that the only connectivity available is ssh?
5
votes
7answers
30k views
How do I permanently change the hostname on Solaris 10?
I want to permanently change the hostname on a Solaris box. How do I do that?
80
votes
4answers
88k views
FreeBSD performance tuning. Sysctls, loader.conf, kernel
I wanted to share knowledge of tuning FreeBSD via sysctl.conf / loader.conf
/ KENCONF / etc. It was initially based on Igor Sysoev's (author of nginx)
presentation about FreeBSD tuning up to ...
15
votes
2answers
34k views
How do I turn off Oracle password expiration?
I'm using Oracle for development on my local machine. The password for a bootstrap account that I always use to rebuild my database has expired.
How do I turn off password expiration for this user ...
34
votes
14answers
56k views
What is the correct temperature for a server room?
When I was working in our server room, I noticed that it was very cold.
I know that the server room has to be cold to offset the heat of the servers, but perhaps it is TOO cold.
What is an ...
4
votes
6answers
39k views
How do I completely remove MySQL from a linux installation?
I was surprised to find that one of my privileged users installed MySQL on a linux box. The server (mysqld) is running and doing nothing. My skills are all in Oracle, so I am unfamiliar with how to ...
14
votes
10answers
70k views
Best way to find the computer a user last logged on from?
I am hoping that somewhere in Active Directory the "last logged on from [computer]" is written/stored, or there is a log I can parse out?
The purpose of wanting to know the last PC logged on from is ...
34
votes
6answers
41k views
How do you add a Windows environment variable without rebooting?
This is probably an easy answer, but I have never been able to find it by googling. I simply would like to add an Environment variable to a Windows machine (desktop or server) and be able to use it ...
4
votes
8answers
61k views
How do I remove a driver completely on a Windows XP client machine?
I have a client (XP SP3) machine where newer drivers have been installed.
Unfortunately while these (audio) drivers fixed mic boost, they have introduced problems such as no input working and ...
51
votes
15answers
40k views
Copying a large directory tree locally? cp or rsync?
I have to copy a large directory tree, about 1.8 TB. It's all local. Out of habit I'd use rsync, however I wonder if there's much point, and if I should rather use cp.
I'm worried about permissions ...
15
votes
3answers
22k views
Can scp copy directories?
Now I can only copy a single tar file,how can I copy directories recursively with scp?
32
votes
3answers
30k views
How to add dependency on a Windows Service AFTER the service is installed
I have a Windows Service that makes use of a SQL Server database. I don't have control over the installation of the service, but would like to add a dependency on the service to ensure that it starts ...
13
votes
3answers
12k views
how do I upgrade from php 5.3 to php 5.4.6 in ubuntu?
Is there an easy way out to get the latest PHP? I have tried updating my package but none of it has 5.4.6 yet.. if anyone knows on how to do it quickly, can it be shared here?
I've tried compiling ...
13
votes
5answers
49k views
How to install Active Directory Users and Computers for Windows 2008
I want to install the administration tools on a Windows Server 2008 (R1) machine. On Windows 2003 you installed adminpak.msi, but I can't find such a file for 2008.
Is this a "feature" in Server ...
4
votes
8answers
82k views
How do I remove Windows Update uninstall files on Windows Server 2008?
I'm running Windows Server 2008 Standard running in VMware. It has 2 disks:
system disk: 16 GB
data disk: 500 MB
I installed Visual Studio 2008 SP1 + MSDN and some small tools and ...
25
votes
7answers
27k views
How to determine JAVA_HOME on Debian/Ubuntu?
On Ubuntu it is possible to have multiple JVMs at the same time. The default one is selected with update-alternatives. But this does not set the JAVA_HOME environment variable, due to a debian policy.
...
9
votes
4answers
44k views
How to properly set permissions for NFS folder? Permission denied on mounting end.
I'm trying to connect to an NFS folder on my dev server. The owner of the folder on the dev server is darren and group darren.
When I export and mount it to my Mac using the Disk Utility it mounts, ...
27
votes
8answers
30k views
When does `cron.daily` run?
When do entries in cron.daily (and .weekly and .hourly) run, and is it configurable?
I haven't found a definitive answer to this, and am hoping there is one.
I'm running RHEL5 and CentOS 4, but for ...
9
votes
9answers
43k views
Windows File and Folder “Attributes” A or C
In Windows Server 2003, in the "Attributes" column of windows explorer, some files have "A" or "C" or "AC" or others. What do these mean?
239
votes
10answers
39k views
How do I deal with a compromised server?
This is a Canonical Question about Server Security - Responding to Breach Events (Hacking)
See Also:
Tips for Securing a LAMP Server
Reinstall after a Root Compromise?
Canonical ...
9
votes
5answers
62k views
Can you use a USB hard drive in ESXI?
I know that you can install ESXi 4.0 on a thumbdrive, but I was wondering if you could plug in an external harddrive to give extra storage to one of your VMs? We run a fileserver inside of ESXi that ...
5
votes
5answers
43k views
How can I start Oracle Enterprise manager after restarting the Red Hat Server?
I installed Oracle 11g on Red Hat Enterprise server 5.0. First time everything worked well.
After creating dbora script file in /etc/init.d/ and setting all the oracle environmental variables I just ...
16
votes
7answers
44k views
How do I restart a Windows service from a script?
I have a batch script that looks like:
sc stop myservice
sc start myservice
it errors out because sc doesn't wait till the service is stopped. How do I restart a service with a script?
14
votes
6answers
34k views
How to take ownership of files from the command line?
Every so often I run into a file that I need to take ownership of. I normally use cacls for changing ntfs permissions, but it doesn't seem to do ownership. Under *nix I would run something like ...
4
votes
6answers
54k views
An Active Directory domain controller for this domain could not be contacted
I get the following error.
An Active Directory Domain Controller for This Domain Could Not be Contacted
and...
I have working Internet. I have an Active Directory domain controller set up on ...
18
votes
5answers
33k views
List all DNS records in a domain using dig?
My company runs an internal DNS for "mycompany.com"
There is a machine on the network that I need to find, but I've forgotten it's name. If I could see a list, it would probably jog my memory.
...
11
votes
4answers
40k views
Where to set java heap options (e.g. -Xmx) for Tomcat 6 under Ubuntu 9.04?
I'm running Tomcat using the tomcat6 package from Ubuntu 9.04, which makes a daemon out of Tomcat using jsvc. I'd like to know the proper way to set Java heap options like -Xmx for Tomcat. I'd like to ...
7
votes
9answers
43k views
psexec: “Access is Denied”?
Inspired by my previous question here, I've been experimenting with PSExec.
The goal is to trip off some fairly simple scripts / programs on one WindowsXP machine from another, and as PowerShell 2 ...
15
votes
8answers
37k views
How do I determine the size of my SQL Server database?
Basic: what's the size on disk of my MS SQL Server DB?
More: can I quickly see where the data is? i.e. which tables, logs, etc
