curlpackage is installed on your system:
# curl --version curl 7.29.0 (x86_64-redhat-linux-gnu)Read more ...
# yum install unbound bind-utilsRead more ...
Last Loginmessage as per on user basis, create a hidden
.hushloginfile inside a user's home directory. For example to suppress a
Last Loginmessage for a
# touch /home/linuxconfig/.hushloginRead more ...
$ sudo -i [sudo] password for linuxconfig: linuxconfig is not in the sudoers file. This incident will be reported.
# usermod -G wheel linuxconfigRead more ...
winetricks. You will be able to create application specific configurations and use different WINE prefixes as well as being able to install Windows
dllsand components to add functionality to your applications.
Dictionariesaren't the Incredible Hulk, but they are supercharged in what they can do. In other languages, dictionaries are referred to as hashes, associative arrays, and associative lists. It's probably best to think of them as associative lists because that's exactly what they are. Dictionaries are lists that associate two values with one another. To think of it in terms of an actual dictionary, they associate a word, or
keywith a definition, or
value. They function sort of like a list with custom indexes.
forloops have a defined length based on the data set that they are iterating over.
forloops are used to access and modify each element in a list. To do this, they temporarily represent each element as a new variable used only within the loop.
forloops have a slightly different structure than
whileloops do. They begin with the word
for, which is followed by the temporary variable being created for the loop. Then there is the keyword
inspecifying the set of data being used, followed by the data set itself and, ultimately, a colon.
range()that either takes a single number and behaves like a list of numbers going from zero until the number before the one specified or takes two numbers separated by a comma and acts like a slice starting at the first number and listing all numbers until the number before the last one.
whileloop repeats the same block of code while a condition is true. When that condition becomes false, the loop will break, and the regular flow of code will resume.
whileloop is similar to what you encountered in the last guide with
if. A while loop begins with the word
whilefollowed by parenthesis containing the condition of the loop and a colon. The following lines are indented and will execute in the loop.
# Import time for sleep import time # While loop while(True): print("looping...") time.sleep(2)What happened? Rather, what is happening? If you haven't figured out how to stop it yet, just press
whileloop will run indefinitely as long as the condition that it is given remains
True. The loop above was given
Trueas its condition, which will never not be true.