Greatest Hits
13
votes
7answers
506k views
How to format as FAT32 from Windows 7/Vista
What is the best way to format a USB drive with FAT32 (for Mac compatibility) from within Windows 7/Vista?
I ask because the Disk Management only lets you pick exFAT (because the disk is over 32GB I ...
33
votes
8answers
176k views
Command line to list users in a Windows Active Directory group?
Is there a command line way to list all the users in a particular Active Directory group?
I can see who is in the group by going to Manage Computer --> Local User / Groups --> Groups and double ...
29
votes
5answers
213k views
How to determine the hostname from an IP address in a Windows network?
My LAN has 50 Windows hosts. At the Windows command line I try
ping to get the IP address of a running Windows machine.
The question is how to get hostname of a specific IP address in the same ...
5
votes
10answers
48k views
Install .NET 3.5 SP1 on Windows 7 RC
While attempting to install .NET 3.5 SP1 on a fresh install of Windows 7 RC, nothing happens. The machine gives a UAC prompt. When selecting Yes, nothing happens.
Using the full redistributable ...
367
votes
5answers
118k views
Anyone else experiencing high rates of Linux server crashes during a leap second day?
*NOTE: if your server still has issues due to confused kernels, and you can't reboot - the simplest solution proposed with gnu date installed on your system is: date -s now. This will reset the ...
52
votes
8answers
132k views
Can't seem to disable Java Automatic Update
I'm just tweaking out my new Windows 7 laptop and wanted to disable the automatic Java updating (and thus kill the silly jusched.exe background process), but I can't seem to get it to actually turn it ...
46
votes
5answers
281k views
79
votes
13answers
198k views
Why do I get “Permission denied (publickey)” when trying to SSH from local Ubuntu to a Amazon EC2 server?
I have an instance of an application running in the cloud on Amazon EC2 instance, and I need to connect it from my local Ubuntu. It works fine on one of local ubuntu and also laptop. I got message ...
12
votes
13answers
154k views
Error 0x80070570: How to delete corrupted and unreadable file?
On my system partition I have a folder which cannot be deleted. This folder has been created by restoring files from an Acronis TrueImage backup.
The error message says:
Error 0x80070570: The ...
92
votes
14answers
158k views
Ping a Specific Port
Just a quick sanity check here.
Can you ping a specific port of a machine, and if so, can you provide an example?
I'm looking for something like ping ip address portNum.
16
votes
6answers
155k views
How do I setup an FTP server on Windows 7?
I'm having trouble getting an FTP server setup on Windows 7.
I've added the service using Control Panel -> Programs -> Turn Windows features on and off.
I can see the service has started in Control ...
24
votes
7answers
169k views
What does “TTL expired in transit” mean on a ping attempt?
We get the message “TTL expired in transit” when we try to ping to a server in a different network segment. When we run tracert, 4 ip addresses repeat themselves indefinitely:
14 60 ms 59 ms ...
37
votes
5answers
208k views
How to check if a port is blocked on Windows?
What is the easiest way to check if port 3306 on my localhost is being blocked?
39
votes
5answers
149k views
What's the difference between Windows Server 2008, 2008 SP2 and 2008 R2?
What are the major differences between Windows Server 2008, 2008 SP2 and 2008 R2?
Are the code bases for these OSes different?
If I'm developing applications for any one of these three, should I be ...
106
votes
11answers
117k views
How to determine if a bash variable is empty?
What is the best way to determine if a variable in bash contains ""?
I have heard it recommended that I do if [ "x$variable" = "x" ]
Is that the correct way? (there must be something more ...
73
votes
13answers
80k views
How to I tell Git for Windows where to find my private RSA key?
My GIT setup runs fine within linux, but when I try to set things up under Windows (using git for windows and tortoisegit) I don't know where to put my private ssh key (or, better still, how to tell ...
116
votes
3answers
115k views
What is a Pem file and how does it differ from other OpenSSL Generated Key File Formats?
I'm pretty much a n00b at system administration and I am responsible for maintaining two Debian servers. Every time I have to do anything with security certificates, I google for tutorials and beat ...
78
votes
24answers
139k views
Using DD for disk cloning
There's been a number of questions regarding disk cloning tools and dd has been suggested at least once. I've already considered using dd myself, mainly because ease of use, and that it's readily ...
13
votes
3answers
30k views
Debian 5.0 (lenny) apt sources fail?
For the past few days, I couldn't update our apt-sources on Debian 5.0 (lenny). I get the following errors.
W: Failed to fetch http://ftp.debian.org/debian/dists/lenny/main/binary-amd64/Packages 404 ...
13
votes
9answers
104k views
In Windows, using the command line, how do you check if a port is open?
I want to see if traffic gets through on a specific port on another machine. Is there a simple way to test for this?
13
votes
8answers
100k views
How do I get this SQL Server ODBC Connection working?
Note: I've obviously changed the server names and IPs to fictitious ones.
Here's what's going on. I've got a server, which I'm calling MYSERVER, running Microsoft SQL Server Express 2005. Right on ...
36
votes
6answers
57k views
What's the default superuser username/password for postgres after a new install?
I have just installed postgres 8.4 on Ubuntu 9.10 and it has never asked me to create a superuser. Is there a default superuser and its password? If not, how do I create a new one?
26
votes
8answers
97k views
How to start/stop iptables on Ubuntu?
How can I start/stop the iptables service on Ubuntu?
I have tried
service iptables stop
but it is giving "unrecognized service".
Why is it doing so? Is there any other method?
36
votes
6answers
87k views
How can I figure out my LDAP connection string?
We're on a corporate network thats running active directory and we'd like to test out some LDAP stuff (active directory membership provider, actually) and so far, none of us can figure out what our ...
10
votes
8answers
97k views
Disable TeamViewer from “stealing” Port 80?
How can you disable TeamViewer from using/reserving port 80? I am certain in the previous version <v4.1.6 there used to be a radio button option in "options" which disabled it from needing it, but ...
60
votes
5answers
136k views
Does Windows have a built-in ZIP command for the command line?
Since Windows Explorer (since at least Windows XP) has some basic support for ZIP files, it seems like there should be a command-line equivalent, but I can't seem to find any sign of one.
Does ...
66
votes
15answers
94k views
How to use rsync over FTP
Debian 4 Linux
I have the following cmd line which works fine.
rsync -avr -e ssh /home/dir user@example.com:/home/
But I need to set it up now to rsync to a remote server that only has an FTP ...
49
votes
12answers
33k views
How do you install Node.JS on CentOS?
I've found numerous installation instructions for Node.js but they all seem so complicated -- I'm not a super sys admin but I can get around. I have yum on the system, but I didn't find any node.js ...
46
votes
7answers
75k views
Run a .bat file in a scheduled task without a window
I have a scheduled task that starts a batch script that runs robocopy every hour. Every time it runs a window pops up on the desktop with robocopy's output, which I don't really want to see.
I ...
37
votes
8answers
42k views
IIS 7.5 (Windows 7) - HTTP Error 401.3 - Unauthorized
I'm trying to test my ASP.Net website on localhost and I'm getting this error:
HTTP Error 401.3 - Unauthorized
You do not have permission to view this directory or page because of
the access control ...
16
votes
16answers
109k views
How to get a list of all IP addresses (and ideally device names) on a LAN?
Our network gave an error that there was an IP address conflict and I'd like to find what all the device IP addresses are. (I've also had need of that before). (update/clarification:I'm looking for a ...
30
votes
5answers
81k views
How to make Windows 7 USB flash install media from Linux?
I have:
ISO image of Windows 7 install media
4 GB USB flash drive
no DVD drive
Linux installed
40
votes
3answers
35k views
how to download ssl certificate from a website?
I want to download the ssl certificate from, say https://www.google.com, using wget or any other commands. Any unix command line? wget or openssl?
148
votes
33answers
46k views
How can I sort du -h output by size
I need to get a list of human readable du output.
However, du does not have a "sort by size" option, and piping to "sort" doesn't work with the human readable flag.
For example, running:
du | sort ...
35
votes
8answers
74k views
What's the command-line utility in Windows to do a reverse DNS look-up?
Is there a built-in command line tool that will do reverse DNS look-ups in Windows? I.e., something like <toolname> w.x.y.z => mycomputername
I've tried:
nslookup: seems to be forward ...
15
votes
4answers
116k views
How to find time server in a domain?
In a Windows domain PDC isn't necessarily the domain time server. How could I identify the authoritative time server?
102
votes
9answers
38k views
How to tell which local branch is tracking which remote branch in Git?
I would like to know if there's a way to tell which local branch is tracking which remote branch in Git.
I'm using one remote server, which is named "origin".
11
votes
8answers
53k views
Check if port is open or closed on a Linux server using SSH?
How can I check if a port is open or closed on a Linux server (running Cent OS 5 and cPanel) using SSH?
EDIT: And how can I open the port if it is closed?
Thanks,
James
184
votes
14answers
99k views
How do you find what process is holding a file open in Windows?
One thing that annoys me no end about Windows is the old "sharing violation" error. Often you can't identify what's holding it open. Usually it's just an editor or explorer just pointing to a relevant ...
65
votes
7answers
65k views
How do I share a Git repository with multiple users on a machine?
I have a Git repository on a staging server which multiple developers need to be able to pull to. git-init seems to have a flag very close to what I'm looking for: --shared, except I'd like multiple ...
11
votes
4answers
82k views
How to check who is currently logged on to windows workstation from command line?
Environment is in domain, server is Windows Server 2003, workstations have Vista and XP installed.
I need the way to check remotely who is currently logged on workstation, preferably from some simple ...
41
votes
6answers
17k views
How can I successfully mount an 8-bit SCSI drive on a modern computer?
I have a number of internal 8-bit SCSI-1 drives that I'd like to archive for historical purposes. These are all the old NeXT Cubes and NeXTStations (monochrome and color) that were used by id ...
66
votes
5answers
49k views
In Nginx, how can I rewrite all http requests to https while maintaining sub-domain?
I want to rewrite all http requests on my web server to be https requests, I started with the following:
server {
listen 80;
location / {
rewrite ^(.*) https://mysite.com$1 ...
4
votes
5answers
54k views
Get IP addresses and Computer Names in the Same Network
What is the command that can be used to get the IP address and the names of the computers that are located in the same network?
I am running Windows
91
votes
5answers
61k views
What's the best way of handling permissions for apache2's user www-data in /var/www?
Has anyone got a nice solution for handling files in /var/www/ ?
We're running Name Based Virtual Hosts and the apache2 user is 'www-data'
We've got two regular users & root. So when messing ...
46
votes
1answer
25k views
What is Active Directory and how does it work?
This is a Canonical Question about Active Directory.
What is Active Directory? What does it do and how does it work?
I find myself explaining some of what I assume is common knowledge about it ...
6
votes
5answers
60k views
Cannot enable network discovery on Windows Server 2008 R2
I'm trying to enable the Network Discovery feature on a newly installed Windows Server 2008 R2 instance.
The network connection is in the Home or Work profile (it is not domain joined). These are the ...
26
votes
5answers
44k views
Find name of Active Directory domain controller
How can I find out the name/IP address of the AD domain controller on my network?
72
votes
9answers
98k views
MySQL: Bind to more than one IP address?
Is there a secret way to bind MySQL to more than one IP address?
As far as I can see the bind-address parameter in the my.cnf does not support more than one IP and you can't have it more than once.
60
votes
7answers
51k views
How to zip/unzip files in Powershell?
Is there a one-liner that will zip/unzip files (*.zip) in PowerShell?
