seat 3 chapter 1 exploring linux command-line tools

Question 1

what are shell environment variables?P4

Answer 1

They are placeholders for data that may be useful to many programs

Question 2

What is the Linux shell used for?P4

Answer 2

Entering commands and configuring for each individual user, and Linux provides a range of available shells.

Question 3

The original C shell isn’t used much on Linux, but if a user is familiar with —-, tcsh makes a good substitute?P5

Answer 3

chs

Question 4

What was the ksh designed for?P5

Answer 4

To make the best features of the bourn shell and the c shell and extend them.

Question 5

What is zsh?P5

Answer 5

It tasks shell evolution further than the Korn shell by incorporating features from earlier shells and adding still more.

Question 6

In Linus most users run — because it is the most popular shell?P5

Answer 6

bash

Question 7

What is a good firs command to try?P6

Answer 7

uname

Question 8

What will uname show?P6

Answer 8

What O S is being run.

Question 9

Internal commands that are built into the shell program are also a called what?P6

Answer 9

Built in commands

Question 10

What is Time an operation?P7

Answer 10

The time command times how long subsequent commands take to execute.

Question 11

What is terminate the shell?P7

Answer 11

It is the exit and logout commands both to terminate the shell.

Question 12

Keep in mind that even when external commands are installed, the —— —— takes precedence?P8

Answer 12

internal command

Question 13

What is PATH?P8

Answer 13

It is a list of directories in which commands can be found.

Question 14

How do you retrieve a command?P10

Answer 14

The simplest way to do this is to press the up arrow key on your keyboard; this brings up the previous command.

Question 15

How do you move within the line?P10

Answer 15

Press Ctrl+a orCtrl+e to move the cursor to the start or end of the line respectively. Ctrl+b and Ctrl+f do the same moving backward and forward within the line