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Identifying and removing null characters in UNIX
... input redirection in the middle of the command arguments works, it does. Most shells will recognize and deal with I/O redirection (<, >, …) anywhere in the command line, actually.
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sudo echo “something” >> /etc/privilegedFile doesn't work
...simplest (and it tought me about tee, which comes in handy in other scenarios as well).
– Joachim Sauer
Apr 8 '09 at 19:00
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Linux command to print directory structure in the form of a tree
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Is this what you're looking for tree? It should be in most distributions (maybe as an optional install).
~> tree -d /proc/self/
/proc/self/
|-- attr
|-- cwd -> /proc
|-- fd
| `-- 3 -> /proc/15589/fd
|-- fdinfo
|-- net
| |-- dev_snmp6
| |-- netfilter
| |-- rpc
| ...
How can i take an UIImage and give it a black border?
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With OS > 3.0 you can do this:
//you need this import
#import <QuartzCore/QuartzCore.h>
[imageView.layer setBorderColor: [[UIColor blackColor] CGColor]];
[imageView.layer setBorderWidth: 2.0];
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How do I remove all .pyc files from a project?
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Most importantly, if this is a dev machine, you can set PYTHONDONTWRITEBYTECODE=True, and you'll never need to do this again. See: this answer.
– mlissner
May 30 '11 at 0:46
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Check whether a cell contains a substring
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@renatov that actually depends on the locale of your OS; specifically, the character used for "list separator".
– pepoluan
Jul 9 '15 at 7:38
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Android Studio Checkout Github Error “CreateProcess=2” (Windows)
...o (it asks for that). So you don't have to edit anything manually.
Just close and restart Android Studio if it's open and you're ready to go.
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How do I fix the “You don't have write permissions into the /usr/bin directory” error when installin
I'm trying to install Rails 3 on a brand new MacBook Pro running OS X 10.6.3, Ruby 1.8.7, and Rails 2.3.5 and I'm wondering if I've hosed myself. So far, I've run these commands:
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How do I check if the Java JDK is installed on Mac?
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You can leverage the java_home helper binary on OS X for what you're looking for.
To list all versions of installed JDK:
$ /usr/libexec/java_home -V
Matching Java Virtual Machines (2):
1.8.0_51, x86_64: "Java SE 8" /Library/Java/JavaVirtualMachines/jdk1.8.0_51.jdk/...
Changing the browser zoom level
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I would say not possible in most browsers, at least not without some additional plugins. And in any case I would try to avoid relying on the browser's zoom as the implementations vary (some browsers only zoom the fonts, others zoom the images...