Greatest Hits

48
votes
3answers
63k 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 ...
16
votes
3answers
114k views

For Loop counting from 1 to n in a windows bat script

I need to run a windows command n times within a bat script file. I know how to do this in various programming languages but cannot manage to get it right on the windows command line :-( I would ...
71
votes
6answers
70k views

How to run a command multiple times?

Is there a way to run a command (e.g. ps aux|grep someprocess) for n times? Something like: run -n 10 'ps aux|grep someprocess' I want to use it interactively, please do not post scripts. ...
107
13
votes
4answers
54k views

RSA certificate configured for SERVER does NOT include an ID which matches the server name

I recently started a LAMP server (all the latest versions) w/ WordPress on it, and I'm trying to install a SSL certificate that I recently purchased. When I restart apachectl, error_log gives me this: ...
123
votes
3answers
72k 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 ...
37
votes
6answers
119k 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> ...
34
votes
4answers
70k views

how do you create an ssh key for another user?

I'm trying to create an ssh key for another user. I'm logged in as root. Can I just edit the files generated by ssh-keygen and change root to the user I want?
54
votes
4answers
64k views

How do I load a sql.gz file to my database? (importing)

I'm trying to import a gzipped SQL file into mysql directly. Is this the right way? mysql -uroot -ppassword mydb > myfile.sql.gz
5
votes
2answers
35k views

how to fix corrupt, not cleanly closed and upgrade needing tables in mysql

When I restart mysql server in Debian, I always have the below messages. How to make the messages disappear or fix the problem/corrupted tables? debian:~# /etc/init.d/mysql restart Stopping MySQL ...
41
votes
9answers
75k views

How do I get apt-get to ignore some dependencies?

How do I make apt-get ignore some dependencies? For example, I wanted to install mailx so I can use it to send email from cron scripts/report-generating tools. However, installing mailx also installs ...
27
votes
7answers
99k 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 ...
13
votes
12answers
111k 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 ...
20
votes
11answers
103k 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 ...
23
votes
5answers
109k 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 ...
75
votes
2answers
94k views

How do I add Access-Control-Allow-Origin in NGINX?

How do I set the Access-Control-Allow-Origin header so I can use web-fonts from my subdomain on my main domain? Notes: You'll find examples of this and other headers for most HTTP servers in the ...
93
21
votes
3answers
85k views

How do I clear Chrome's SSL cache?

I have a HAProxy / stunnel server that handles SSL for our sites on AWS. During testing, I created a self-signed cert on this server and hit it from my desktop using Chrome to test that stunnel was ...
29
votes
4answers
156k views

How to enable MySQL logging?

I am running MySQL 5.0.45 on OS X 10.6.1 and I cannot get MySQL to log anything. I am debugging an application and need to see all queries and errors. I added to the etc/my.cnf: [mysqld] ...
14
votes
3answers
75k 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 ...
109
90
votes
4answers
81k 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. ...
39
votes
3answers
20k views

How can I check /dev/xvda1?

On login to EC2 (Ubuntu) instance, I see *** /dev/xvda1 should be checked for errors *** I can't fsck /dev/xvda1 because it is mounted, and sudo umount /dev/xvda1 fails because it is in use. lsof ...
23
votes
5answers
101k 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 ...
33
votes
1answer
79k views

How do I change the privileges for MySQL user that is already created?

I understand how to create a new user with privileges, but what is the correct way to change privileges for users that are already created? We are running a DB audit and some of the users have way ...
106
45
votes
10answers
109k views

Running a cron job manually and immediately

(I have already read How can I test a new cron script ?.) I have a specific problem (cron job doesn't appear to run, or run properly), but the issue is general: I'd like to debug scripts that are ...
15
votes
4answers
30k views

500 error on fresh install of IIS and PHP

When attempting to run a PHP file on Windows server 2012 and IIS, I keep getting a 500 error. I cannot find any detailed logs or anything. However, when going to PHP Manager for IIS and click check ...
91
18
votes
5answers
45k views

Connecting to MySQL from PHP is extremely slow

I just did a fresh install of XAMPP. When first opening PHPMyAdmin I noticed it was extremely slow. It didn't make sense that on localhost it should take almost 5 seconds for every page to open. I ...
271
votes
27answers
61k views

100% uptime for a web application

We received an interesting "requirement" from a client today. They want 100% uptime with off-site failover on a web application. From our web application's viewpoint, this isn't an issue. It was ...
9
votes
1answer
19k views

Default browser opens to msn.com when logging into Windows Server

I installed a fresh Windows Server 2012 R2 Standard with GUI instance on a VMware VM. The first time I logged in as Administrator, I noticed an Internet Explorer window automatically opened to ...
7
votes
4answers
107k 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 ...
61
votes
6answers
69k views

When does /tmp get cleared?

I'm taking to putting various files in /tmp, and I wondered what the rules on deleting them are? I'm imagining it's different for different distributions, and I'm particularly interested in Ubuntu ...
8
votes
1answer
61k views

Deploying VM from vmdk / vmx file

I have a vmdk file and vmx file (and all the other files from someone elses datastore) copied onto my own data store. If I try to deploy from the vmx file, I get a vm with the name "unknown # ...
53
votes
3answers
75k views

How to override/update a symlink?

I am trying to use symbolic links. I did some reading and found the following commands: Creation -> ln -s {/path/to/file-name} {link-name} Update -> ln -sfn {/path/to/file-name} {link-name} ...
3
votes
3answers
35k views

Renewing SBS2011 Exchange Self-Signed Certificate w/o changing home page in IE?

On a previous server when we used the built in SBS wizard to renew the certificate it worked, however it reset all of the computers on the domain's IE home page to companyweb. Is there a way to do ...
34
votes
4answers
140k views

How to filter http traffic in Wireshark?

I suspect my server has a huge load of http requests from its clients. I want to measure the volume of http traffic. How can I do it with Wireshark? Or probably there is an alternative solution using ...
56
votes
8answers
86k views

How can I monitor hard disk load on linux

Is there a good command line utility to monitor hard disk load on linux? Something like top but then monitoring disk activity i.s.o. cpu usage. More specifically, I suspect that for some (heavy load) ...
24
votes
3answers
62k 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 ...
29
votes
5answers
62k views

how to restart/clear memcache without restarting the whole web server?

/opt/eduserver/eduserver gives me options: Usage: /opt/eduserver/eduserver ...
23
votes
5answers
59k 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 ...
47
votes
6answers
87k views

How do I verify the speed of my NIC?

I just installed a new gigabit network interface card (NIC) in Linux. How do I tell if it is really set to gigabit speeds? I see ethtool has an option to set the speed, but I can't seem to figure ...
22
votes
8answers
97k views

Nginx + php-fpm “504 Gateway Time-out” error with almost zero load (on a test-server)

After debugging for 6-hours - I am giving this up :| We have a nginx+php-fpm+mysql in LAN with almost 100 wordpress (created and used by different designers/developers all working on test wordpres ...
8
votes
4answers
116k views

How to check if hardware RAID is configured?

I have several servers running Windows 2008 and Red Hat 5 that are capable of hardware RAID. How do I check that hardware RAID is configured?
41
votes
4answers
140k 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 ...
15
votes
5answers
87k views

How do I determine what my DHCP server is?

I have a sad network left behind by some careless admins - I am in process of figuring out exactly what services are running where, not excluding the possibility that some services are running from ...
23
votes
12answers
81k views

How to recover from “Too many Authentication Failures for user root”

I've done several attempts to establish SSH-connecton for user root@host using putty terminal. While doing so I specified wrong credentials several times and after that I've specified them correctly, ...
103
105
votes
1answer
76k views

What is a challenge password?

I'm setting up SSL on an Ubuntu server. One of fields it asks for as part of setting up the CSR is a "challenge password". What is that? The default is blank. Do I need to enter one?
89
189
votes
9answers
29k views

Heartbleed: What is it and what are options to mitigate it?

This is a Canonical Question about understanding and remediating the Heartbleed security issue. What exactly is CVE-2014-0160 AKA "Heartbleed"? What is the cause, what OSs and versions of OpenSSL ...
19
votes
10answers
99k views

How do I make Linux recognize a new SATA /dev/sda drive I hot swapped in without rebooting?

Hot swapping out a failed SATA /dev/sda drive worked fine, but when I went to swap in a new drive, it wasn't recognized: [root@fs-2 ~]# tail -18 /var/log/messages May 5 16:54:35 fs-2 kernel: ata1: ...
22
votes
4answers
103k views

What's the maximum number of wifi connections for a single WiFi router?

We've got a Draytek 2829VN Wifi router and I'm wondering how many concurrent connections I should expect a router of this kind to cope with? We are looking to connect 60 iPads! I'd also be ...
8
votes
11answers
75k views

Exchange 2010 and Outlook 2010 requesting password every time it starts

I have one Exchange 2010 server which is fully updated, the clients are running Outlook 2010 but some users are getting a prompt for credentials every time they open Outlook. I have checked for ...
41
votes
7answers
156k views

Where to check log of sendmail?

I can't send out emails, need to look into the logs, but where is the log?
5
votes
3answers
83k views

Email bounce back 550 5.1.1 recipient rejected

A client recently switched to Exchange Server / Outlook for their email. Since then emails from my company to any email address at their company bounce back from the System Administrator with this ...