Language Learning website-the first day of the experimental Building Linux review

Found a good learning language place, you can look at the side of the code to enter the test. There will be some homework problems. And some competitions, the first two games and the total learning time to reach 3,000 minutes can join a hundred-floor club opportunity.
The first test is a variable parameter, to note that there are variable parameters can be passed an array, if the array is null will be an error, if the array contents are empty is also feasible.
The following review of yesterday's Linux

· Su switch user with sudo administrator permissions

· Add user sudo adduser lilei

New users will also be created by default for the new user home directory/home/lilei

Groups user Group

Su Shiyanlou
sudo usermod-g sudo lilei

Remove user sudo deluser lilei--remove-home


View File Permissions Ls-l

LS Common commands

sudo chown < username > < file name >

Modify file permissions in two ways

Language Learning website-the first day of the experimental Building Linux review