Ubuntu ubuntu-other

Since you're looking for optimization for speed, that will go more likely to the hard drive. Hard drives are tipically sorted on two actual general options. 5400RPM hard drives are cheaper, and...

Using grep:

grep -E '^-e' 1.txt >2.txt
grep -E '' 1.txt >3.txt

@braemar: Using grep -v with the same regexp would erroneously...

Found a solution with httrack and is the simplest one.

httrack http://www.abc.def/ghi/ -O <output-folder>

the key is that, by default,...

What appears at your command prompt is stored in the variable $PS1. It is generally in the format username@hostname:~$ (depending on your current directory and whether...

Here is an example that should demonstrate the difference

~$ t="alfa beta"
~$ if  ; then echo OK ; fi 
 bash: [: alfa: binary operator expected
~$ if  ; then echo OK ; fi 
 OK
~$...