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Why is Linux called a monolithic kernel?
...ion, etc.) are a tight knit group sharing the same space. This directly opposes a microkernel.
A microkernel prefers an approach where core functionality is isolated from system services and device drivers (which are basically just system services). For instance, VFS (virtual file system) and block...
Find where python is installed (if it isn't default dir)
...
In unix (mac os X included) terminal you can do
which python
and it will tell you.
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How can I find the version of the Fedora I use?
...d the login banners … I typically edit mine, and so, it seems, do many (most) corporate IT departments... :-(
– BRPocock
Dec 2 '11 at 16:05
8
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What are carriage return, linefeed, and form feed?
...eed means to advance downward to the next line; however, it has been repurposed and renamed. Used as "newline", it terminates lines (commonly confused with separating lines). This is commonly escaped as \n, abbreviated LF or NL, and has ASCII value 10 or 0x0A. CRLF (but not CRNL) is used for the p...
Convert string to integer type in Go?
...
For example,
package main
import (
"flag"
"fmt"
"os"
"strconv"
)
func main() {
flag.Parse()
s := flag.Arg(0)
// string to int
i, err := strconv.Atoi(s)
if err != nil {
// handle error
fmt.Println(err)
os.Exit(2)
}
fmt...
How to set NODE_ENV to production/development in OS X
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Refer to npmjs.com/package/cross-env for a simple cross-platform solution. cross-env NODE_ENV=production works on windows and linux / mac.
– AntonB
Jun 4 '16 at 13:55
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How do I use the nohup command without getting nohup.out?
...sn't create nohup.out
On Linux, running a job with nohup automatically closes its input as well. On other systems, notably BSD and macOS, that is not the case, so when running in the background, you might want to close input manually. While closing input has no effect on the creation or not of no...
Android 4.3 Bluetooth Low Energy unstable
...
Important implementation hints
(Perhaps some of those hints aren't necessary anymore due to Android OS updates.)
Some devices like Nexus 4 with Android 4.3 take 45+ seconds to connect using an existing gatt instance. Work around: Always close gatt instances on disconnect a...
How to create Drawable from resource
...21+
Code would look something like this.
Drawable myDrawable;
if(android.os.Build.VERSION.SDK_INT >= android.os.Build.VERSION_CODES.LOLLIPOP){
myDrawable = context.getResources().getDrawable(id, context.getTheme());
} else {
myDrawable = context.getResources().getDrawable(id);
}
...
Is optimisation level -O3 dangerous in g++?
I have heard from various sources (though mostly from a colleague of mine), that compiling with an optimisation level of -O3 in g++ is somehow 'dangerous', and should be avoided in general unless proven to be necessary.
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