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What linux shell command returns a part of a string? [duplicate]
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If you are looking for a shell utility to do something like that, you can use the cut command.
To take your example, try:
echo "abcdefg" | cut -c3-5
which yields
cde
Where -cN-M tells the cut command to return columns ...
How do I remove a single file from the staging area (undo git add)?
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If I understand the question correctly, you simply want to "undo" the git add that was done for that file.
If you need to remove a single file from the staging area, use
git reset HEAD -- <file>
If you need to remove...
How do sessions work in Express.js with Node.js?
...server will use to make sure the cookie data hasn't been tampered with, so if you try and change a value the cookie will be invalid)
The session data, as opposed to some frameworks (e.g. Play Framework!) is held on the server, so the cookie is more like a placeholder for the session than a holder of...
Access index of the parent ng-repeat from child ng-repeat
... and the issue was something else in my actual code. Still, I know it was difficult to find examples of this so I'm answering it in case someone else is looking.
<div ng-repeat="f in foos">
<div>
<div ng-repeat="b in foos.bars">
<a ng-click="addSomething($parent.$in...
MySQL dump by query
...able" -u myuser -pxxxxxxxxx mydatabase
you can redirect it out to a file if you want :
mysql -e "select * from myTable" -u myuser -pxxxxxxxx mydatabase > mydumpfile.txt
Update:
Original post asked if he could dump from the database by query. What he asked and what he meant were different. H...
Does Dispose still get called when exception is thrown inside of a using statement?
... is the connection going to close and disposed when an exception is thrown if it is within a using statement?
3 Answers
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Prompt for user input in PowerShell
...ecureStringToBSTR($pass))
As for the type returned by $host.UI.Prompt(), if you run the code at the link posted in @Christian's comment, you can find out the return type by piping it to Get-Member (for example, $results | gm). The result is a Dictionary where the key is the name of a FieldDescript...
Smooth GPS data
...cation as a latitude and longitude, together with an accuracy which is specified as a single number measured in metres. This means that instead of a covariance matrix, the accuracy in the Kalman filter can be measured by a single number, even though the location in the Kalman filter is a measured b...
Xcode 5 & Asset Catalog: How to reference the LaunchImage?
... = self.view.bounds.size;
NSString* viewOrientation = @"Portrait";
if (UIDeviceOrientationIsLandscape(orientation)) {
viewSize = CGSizeMake(viewSize.height, viewSize.width);
viewOrientation = @"Landscape";
}
NSArray* imagesDict = [[[NSBundle mainBundle] infoDictionar...
How to RSYNC a single file?
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You do it the same way as you would a directory, but you specify the full path to the filename as the source. In your example:
rsync -avz --progress /var/www/public_html/.htaccess root@<remote-ip>:/var/www/public_html/
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