Ubuntu Unleashed 2019 Edition: Covering 18.04, 18.10, 19.04

defeats the entire concept of file permissions. Knowing how to run commands as the super user (root) without log ...

matthew is not in the sudoers file. This incident will be reported. Sometimes, you might not even receive an ...

root@seymour:~# mount -o rw,remount / NOTE You now have complete root access and read/write privileges on the m ...

# User privilege specification root ALL=(ALL:ALL) ALL # Members of the admin group may gain root privil ...

Changing password for user sandra. New password: Retype new password: passwd: all authentication tokens updated succ ...

To incorporate a timed shutdown and a pertinent message to all active users, use shutdown’s time and message o ...

to track down what an intruder might have changed, either to repair the damage or to try to catch ...

Managing running programs—bg, fg, kill, killall, nice, ps, pstree, renice, top, watch Getting information—apropo ...

CHAPTER 11 ...

Command-Line Master Class, Part 1 IN THIS CHAPTER Why Use the Command Line? Using Basic Commands References Some Lin ...

Master Foo said nothing, but pointed at the moon. A nearby dog began to bark at the master’s hand. “I don ...

are available through the GUI, but these commands usually have only a small subset of their parameters av ...

less—Filters for paging through output ln—Creates links between files locate—Finds files from an index ls—Lists ...

Linux life that you need them, you can just read the manual page. We go over these commands one by ...

Changing Directories with cd Changing directories is surely something that has no options, right? Well, cd ...

the CDPATH environment variable. If this variable is not set, cd always uses the current directory as the bas ...

bash has still printed the new directory; it does that whenever it looks up a directory in CDPATH. Changi ...

used and mastered. However, two marvelous parameters rarely see much use, despite their power—which is a sha ...

pattern as opposed to a regular expression, which means you can use ? to match a single character or * to m ...

variable name to output the value, like this: Click here to view code image matthew@seymour:~$ echo ...