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Quick unix command to display specific lines in the middle of a file?
...two other solutions if you know the line number but nothing else (no grep possible):
Assuming you need lines 20 to 40,
sed -n '20,40p;41q' file_name
or
awk 'FNR>=20 && FNR<=40' file_name
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Running V8 Javascript Engine Standalone
...engine and adds a lot of functionality on top of it.
For example on Mac OSX if you have Homebrew installed, simply issue:
$ brew install node
$ node
>
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How do I pause my shell script for a second before continuing?
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It seems on Mac OS X, the s, m, h, nor d have any impact. You must specify the time in seconds.
– The AI Architect
Aug 19 '17 at 15:31
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Version of Apache installed on a Debian machine
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apachectl -V dosen't work on suse10.04 instead we have to type /usr/sbin/apache2ctl -v to get right answer with root permission
– farzam
Sep 29 '14 at 8:42
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How to find and turn on USB debugging mode on Nexus 4
... see the option for USB debugging mode in Nexus 4 or Android 4.2 or higher OS, do the following:
Open up your device’s “Settings”. This can be done by pressing the
Menu button while on your home screen and tapping “System settings”
Now scroll to the bottom and tap “About phone” or ...
Bash script and /bin/bash^M: bad interpreter: No such file or directory [duplicate]
...dows env and then porting over to run on a Unix environment.
Try running dos2unix on the script:
http://dos2unix.sourceforge.net/
Or just rewrite the script in your Unix env using vi and test.
Unix uses different line endings so can't read the file you created on Windows. Hence it is seeing ^M ...
Does free(ptr) where ptr is NULL corrupt memory?
...his is because some C runtimes (I for sure remember it was the case on PalmOS) would crash when freeing a NULL pointer.
But nowadays, I believe it's safe to assume free(NULL) is a nop as per instructed by the standard.
shar...
Best lightweight web server (only static content) for Windows [closed]
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Have a look at mongoose:
single executable
very small memory footprint
allows multiple worker threads
easy to install as service
configurable with a configuration
file if required
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How do I test a camera in the iPhone simulator?
... That kinda sucks, what if you need to test on an earlier version of the OS set in your deployment target, guess you'd be screwed then.
– marchinram
Dec 15 '10 at 4:03
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Get yesterday's date in bash on Linux, DST-safe
... On the other hand, there is IIRC no place where the switch would happen close to the local noon. So, "1300J is never on a DST boundary" is a reasonable assumption.
– Piskvor left the building
Mar 28 '17 at 10:24
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