Greatest Hits

23
votes
4answers
69k views

VirtualBox: How to set up networking so both host and guest can access internet and talk to each other

I was wondering if someone could give me a simple guide on how to set up virtual networking in VirtualBox (4.0.2) so that the following scenarios work: Both Host and Guest can access Internet Host ...
26
votes
4answers
55k views

System process (PID 4) constantly accessing the hard disk

Recently I noticed some of our machines are getting sluggish, mainly after boot-up. Using the Resource Monitor I detected excessive disk access from the system process with PID 4. Following some tips, ...
22
votes
7answers
77k views

What is the recommended size for a Linux /boot partition?

What is the recommended size for a Linux /boot partition? And is it safe to not have a /boot partition? I see some servers don't have a /boot partition while some servers have a 128 MB /boot ...
21
votes
4answers
63k views

How to configure vsftpd to work with passive mode

Whenever I install vsftpd on centos, I only setup the jail environment for the users and rest is default configuration of vsftpd. I create user and try to connect with filezila ftp client but I could ...
54
16
votes
3answers
69k views

How to stream live video from a linux server?

Here is what I want to do. Looked around but didnt find any straight answer. I have a Linux box running websites using Ubuntu/MySQL/Apache. I have my own static IP as well, i.e. not using web hosting. ...
16
votes
4answers
71k views

How do you wait for an exe to complete in batch file?

I'm trying to create a script to execute an exe on shutdown in order to install sp1. my script goes something like (not actual bat script). If installed GOTO END Install.exe END: My problem is ...
92
votes
7answers
94k views

Setting the hostname: FQDN or short name?

I've noticed that the "preferred" method of setting the system hostname is fundamentally different between Red Hat/CentOS and Debian/Ubuntu systems. CentOS documentation and the RHEL deployment guide ...
33
votes
6answers
97k views

How to configure basic authentication in Apache httpd virtual hosts?

I'm trying to configure mercurial access using Apache http. It requires authentication. My /etc/apache2/sites-enabled/mercurial looks like this: NameVirtualHost *:8080 <VirtualHost *:8080> ...
31
votes
8answers
74k views

How to display certain lines from a text file in Linux?

I guess everyone knows the useful Linux cmd line utilities head and tail. Head allows you to print the first X lines of a file, tail does the same but prints the end of the file. What is a good ...
16
votes
9answers
43k views

Linux (mv or cp) specific files from a text list of files?

I have a directory of many files, something like 50,000 pdf's and other files on a server. I need to move specific ones to another directory. I can generate a list of the files that need to be moved ...
22
votes
7answers
81k 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?
15
votes
11answers
80k views

How do I find out which devices are on a network?

How do I scan a network to find out which devices are on it? (I'd be happy with a list of MAC addresses and IPs.) For example, lets say I'm at work and want to be sure that there are no unknown ...
17
votes
12answers
55k views

Is it better to use the 192.168.x.x or 10.x.x.x address range for a small business network?

For best performance and ease of management, is it better to use 192.168.x.x or 10.x.x.x range of addresses for a small (<50 PCs) business network? This would correspond to a subnet of 255.255.0.0 ...
11
votes
5answers
49k views

Nginx 1 FastCGI sent in stderr: “Primary script unknown”

My first time using Nginx, but I am more than familiar with Apache and Linux. I am using an existing project and when ever I am trying to see the index.php I get a 404 File not found. Here is the ...
30
votes
14answers
70k 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 ...
87
16
votes
5answers
89k views

Need to add a “Wait” command to a Powershell script

Here is my current code: Write-output “ENTER THE FOLLOWING DETAILS - When Creating Multiple New Accounts Go to EMC hit F5(refresh) and make sure previous new account is listed before ...
26
votes
7answers
103k views

Finding why a user is locked out in Active Directory

A user's account keeps getting locked out in Active Directory. It's probably caused by an app that's using Windows authentication to connect to SQL Server. Is there a way to find out which app is ...
20
votes
4answers
49k views

How do you free up a port being held open by dead process?

A colleague of mine recently ran into a problem where a process that had supposedly died was still bound to a network port, preventing other processes from binding to that port. Specifically, netstat ...
7
votes
4answers
93k views

How to restore/import an Oracle database from dmp file?

I've recently recieved the dump file of the soon to be migrated Oracle Database. I've installed Oracle 10g and now i need to restore the original database. Can anyone give me a step to step ...
27
votes
10answers
72k views

Windows server last reboot time

How can I find a Windows server's last reboot time, apart from 'net statistics server/workstation'?
75
6
votes
6answers
50k views

How do I restart SharePoint Timer Service from command line?

How do I restart SharePoint Timer Service from command line?
21
votes
2answers
39k views

How to make wireshark filter POST-requests only?

How to make wireshark filter POST-requests only?
69
votes
3answers
61k views

how to disable SSH login with password for some users?

On Linux (Debian Squeeze) I would like to disable SSH login using password to some users (selected group or all users except root). But I do not want to disable login using certificate for them. ...
18
votes
13answers
59k views

How to get a list of drive letters on a system through a windows shell (bat, cmd)?

How do I get a list of drive letters and their associated labels on a windows system through a bat file?
77
votes
19answers
55k views

How can I get the size of an Amazon S3 bucket?

I'd like to graph the size (in bytes, and # of items) of an Amazon S3 bucket and am looking for an efficient way to get the data. The s3cmd tools provide a way to get the total file size using s3cmd ...
35
votes
4answers
81k views

Postfix - how to retry delivery of mail in queue?

I have a backup mail server in case of a failure on the main one. In that case of failure, mails come on the backup server and stay there until the main one is back. If I wait some times, the ...
35
votes
4answers
124k 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 ...
5
votes
2answers
43k views

List All Groups and Their Members with PowerShell on Win2008r2

I am new to powershell, but I've been reading manuals and practiced a little bit. My objective is to List all users in all Security Groups under specified path. I have found the way to do it: ...
35
votes
7answers
92k views

Why do I get sqlite error, “unable to open database file”?

Using my Django app, I'm able to read from the database just fine. When the application didn't have permission to access the file, it gave me this error: attempt to write a readonly database ...
91
votes
4answers
54k views

Moving an already-running process to Screen

My office job routinely sees me connected to a Linux box via VNC. Sometimes I start a remote job on the console, and realize later that it runs much longer than expected. (Should have started that ...
58
votes
12answers
90k views

Subversion error: (405 Method Not Allowed) in response to MKCOL

I am getting the following error while trying to commit a new directory addition. svn: Commit failed (details follow): svn: Server sent unexpected return value (405 Method Not Allowed) in response to ...
71
21
votes
3answers
39k views

apt-get update getting 404 on debian lenny

Here is my /etc/apt/sources.list ###### Debian Main Repos deb http://ftp.us.debian.org/debian/ lenny main contrib non-free ###### Debian Update Repos deb http://security.debian.org/ lenny/updates ...
11
votes
5answers
109k views

How do I increase the maximum number of concurrent remote connections in Windows Server 2003?

I am trying to allow more than the default of 2 concurrent remote connections to a server running Windows Server 2003. Background: I went to "Start" => "Administration Tools" => "Terminal Services ...
5
votes
8answers
100k 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 ...
9
votes
11answers
85k views

Windows command prompt: how to get the count of all files in current directory?

What command would you use in cmd.exe to find the number of files in the current directory? Is there a powershell option here? Update: I was hoping to avoid dir, as I know there are 10,000+ files in ...
29
votes
9answers
35k views

Disk full, du tells different. How to further investigate?

I have a SCSI disk in a server (hardware Raid 1), 32G, ext3 filesytem. df tells me that the disk is 100% full. If I delete 1G this is correctly shown. However, if I run a du -h -x / then du tells me ...
3
votes
3answers
52k views

How do I get SonicWALL Global VPN to work with Windows 8.1?

I have been running SonicWALL Global VPN v4.7.3.0403 on Windows 8 without trouble for more than a year. Today I upgraded to Windows 8.1 RTM and noticed that it disabled my Global VPN connection. I ...
15
votes
11answers
119k 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 ...
18
votes
5answers
60k views

Prevent Windows Server 2012 from forcing a reboot after updates

I have a domain controller with Windows Server 2012 on it. After updates, the server does not reboot immediately. However if I remote into the server I will be presented with a countdown for a reboot. ...
50
votes
9answers
113k 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 ...
34
votes
2answers
43k views

How to get the url of the current svn repo?

I have 2 svn checkouts that someone setup for me. Now I need to check these same files on another computer, but since I didn't check them out initially I don't know the urls to use when running the ...
20
votes
3answers
47k views

MySQL lowering wait_timeout value to lower number of open connections

I run a rather busy site, and during peek hours I see over 10.000 open connections to my database server on my webserver when a run a netstat command. 99% of the connections are in the TIME_WAIT ...
61
votes
7answers
100k views

Apache 2 startup warning: NameVirtualHost *:80 has no VirtualHosts

When my Ubuntu Apache server (Apache 2) starts up I get a warning message that reads: [warn] NameVirtualHost *:80 has no VirtualHosts However, the web server is working fine. What might I have ...
11
votes
2answers
47k views

How do i find out what my IP Address of my MySQL host is?

I have a free domain running at x10hosting (x10.bz), and I want to find out the IP Address of my MySQL host for it, so I can contact the MySQL database from another host. I've already added that host ...
22
votes
4answers
79k views

connect() failed (111: Connection refused) while connecting to upstream

I'm experiencing 502 gateway errors when accessing a PHP file in a directory (http://domain.com/dev/index.php), the logs simply says this: 2011/09/30 23:47:54 [error] 31160#0: *35 connect() failed ...
12
votes
3answers
62k views

How to check my PHP and MySQL version on Ubuntu VPS?

HI I am going to install MyBB but I am not sure whether I have installed the correct version of PHP and MySQL. PHP version 5.1.0 or above with XML Extension installed MySQL version 4.0 or ...
16
votes
4answers
42k views

Unknown/unsupported storage engine: InnoDB | MySQL Ubuntu

I recently upgraded from the previous LTS Ubuntu to Precise and now mysql refuses to start. It complains of the following when I attempt to start it: ╰$ sudo service mysql restart stop: Unknown ...
10
votes
2answers
70k views

How to test a LDAP connection from a client

How to check the LDAP connection from a client to server. I'm working on the LDAP authentication and this client desktop needs to authenticate via a LDAP server. I can SSH to the LDAP server using ...
17
votes
8answers
81k views

How to make a bootable USB drive out of a bootable DVD or CD

Is there a "universal" way of how you can make a bootable USB drive out of a bootable dvd or cd? What makes a USB drive bootable? What makes a dvd and cd bootable? For example there is a program ...
100
votes
4answers
140k views

FreeBSD performance tuning: Sysctl parameter, 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 ...