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Efficiently test if a port is open on Linux?
... sending an email, exiting the script on failure, or starting the required service.
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How to drop a PostgreSQL database if there are active connections to it?
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I just restart the service in Ubuntu to disconnect connected clients.
sudo service postgresql stop
sudo service postgresql start
psql
DROP DATABASE DB_NAME;
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How to check if an activity is the last one in the activity stack for an application?
...Use the following code:
ActivityManager mngr = (ActivityManager) getSystemService( ACTIVITY_SERVICE );
List<ActivityManager.RunningTaskInfo> taskList = mngr.getRunningTasks(10);
if(taskList.get(0).numActivities == 1 &&
taskList.get(0).topActivity.getClassName().equals(this.getCla...
Is it necessary to explicitly remove event handlers in C#
...unsubscribe the handlers. For example, suppose you have some data transfer service which lets you subscribe to asynchronous notifications about bandwidth changes, and the transfer service object is long-lived. If we do this:
BandwidthUI ui = new BandwidthUI();
transferService.BandwidthChanged += ui...
http HEAD vs GET performance
I am setting-up a REST web service that just need to answer YES or NO, as fast as possible.
8 Answers
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How to secure MongoDB with username and password
...This will enable authentication for mongodb.
Then, restart mongodb : sudo service mongod restart
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GitHub Windows client behind proxy
...p proxy, edit cntlm.ini file with the output of cntlm, restart the windows service. Update .gitconfig with:
[https] proxy = localhost:3128
[http] proxy = localhost:3128
Now cntlm will do all the authentication, and you'll be able to use GitHub(and Dropbox, btw) behind the corp proxy. At least unt...
How to run a PowerShell script without displaying a window?
...s having this problem when running from c#, on Windows 7, the "Interactive Services Detection" service was popping up when running a hidden powershell window as the SYSTEM account.
Using the "CreateNoWindow" parameter prevented the ISD service popping up it's warning.
process.StartInfo = new Pro...
MSSQL Error 'The underlying provider failed on Open'
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In windows 7 you can open the DTC config by running dcomcnfg, Component Services -> Computers -> My Computer -> Distributed Transaction Coordinator -> Right click to Local DTC -> Security.
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Node.js app can't run on port 80 even though there's no other process blocking the port
...nswer: You can allow node access to that port using:
setcap 'cap_net_bind_service=+ep' /path/to/nodejs
long answer
Edit:
May not work on new node versions
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