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How to find all serial devices (ttyS, ttyUSB, ..) on Linux without opening them?
... in /dev is useless, since you already have the name in /sys/class/tty (as by default udev creates the /dev/DEVNAME node). What you are interested about is any "symbolic" link in /dev that points to such device. This is much much harder to find.
– xryl669
May 3...
What's the meaning of 'origin' in 'git push origin master'
...ut local branch (i.e. from your file system) to the remote repo identified by the name origin on its remote branch named master.
– skuro
Nov 16 '16 at 13:42
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Semicolons superfluous at the end of a line in shell scripts?
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In the special case of find, ; is used to terminate commands invoked by -exec. See the answer of @kenorb to this question.
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How do I refresh the page in ASP.NET? (Let it reload itself by code)
How do I refresh a page in ASP.NET? (Let it reload itself by code)
13 Answers
13
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Difference between HEAD and master
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master is a reference to the end of a branch. By convention (and by default) this is usually the main integration branch, but it doesn't have to be.
HEAD is actually a special type of reference that points to another reference. It may point to master or it may not (it w...
Python datetime to string without microsecond component
... returned elsewhere, the desired format is 2011-11-03 11:07:04 (followed by +00:00 , but that's not germane).
11 Answers...
ERROR 1044 (42000): Access denied for user ''@'localhost' to database 'db'
... in bash, not at the MySQL command-line.
If you are in mysql, you can exit by typing exit.
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How to resize an image with OpenCV2.0 and Python2.6
... need to use the resize function.
For example, this will resize both axes by half:
small = cv2.resize(image, (0,0), fx=0.5, fy=0.5)
and this will resize the image to have 100 cols (width) and 50 rows (height):
resized_image = cv2.resize(image, (100, 50))
Another option is to use scipy modul...
Cron jobs and random times, within given hours
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You can make the arithmetic assignments more readable by dropping the dollar sign and moving the double parens to the left (e.g. ((maxdelay = 14 * 60)) or ((delay = $RANDOM % maxdelay))). The sleep argument still needs to be the way you have it (although you could add spaces, if...
Reusing output from last command in Bash
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You can save yourself from typing $(your_cmd) by using backticks: `your_cmd` According to the Gnu Bash manual they are functionally identical. Of course this is also subject to the warning raised by @memecs
– user2065875
Apr 20 '15 ...