103 GNU and Unix Commands KA

Question 1

103.1 Work on the command line

Answer 1

Key Knowledge Areas:

Use single shell commands and one line command sequences to perform basic tasks on the command line.
Use and modify the shell environment including defining, referencing and exporting environment variables.
Use and edit command history.
Invoke commands inside and outside the defined path.

Question 2

Use single shell commands and one line command sequences to perform basic tasks on the command line.

Answer 2

Practice using single shell commands. However, to use a line of commands then try the following:
pipe = |
separate commands = ;
Pipes will pass data via stdout from one command to the next. Whereas ; will execute one command after another and display any output to stdout vs. passing it on.

Question 3

Use and modify the shell environment including defining, referencing and exporting environment variables.

Answer 3

Shell environments can be displayed by typing env or printenv into the CLI. when setting environmental variables they need to be exported using the export command. So env var1=test will add var1 to a temporary environment. To permanently change the environment use export var1=test. If changes just need to be made to the shell variables then use set. set var2=test will create a var2 variable for the shell to use. To delete any environmental or shell values then just use the unset command.

Question 4

Use and edit command history.

Answer 4

a

Question 5

Invoke commands inside and outside the defined path.

Answer 5

a

Question 6

103.2 Process text streams using filters

Answer 6

Key Knowledge Areas:

Send text files and output streams through text utility filters to modify the output using standard UNIX commands found in the GNU textutils package.

Question 7

Send text files and output streams through text utility filters to modify the output using standard UNIX commands found in the GNU textutils package.

Answer 7

a

Question 8

103.3 Perform basic file management

Answer 8

Key Knowledge Areas:

Copy, move and remove files and directories individually.
Copy multiple files and directories recursively.
Remove files and directories recursively.
Use simple and advanced wildcard specifications in commands.
Using find to locate and act on files based on type, size, or time.
Usage of tar, cpio and dd.

Question 9

Copy, move and remove files and directories individually.

Answer 9

a

Question 10

Copy multiple files and directories recursively.

Answer 10

a

Question 11

Remove files and directories recursively.

Answer 11

a

Question 12

Use simple and advanced wildcard specifications in commands.

Answer 12

a

Question 13

Using find to locate and act on files based on type, size, or time.

Answer 13

a

Question 14

Usage of tar, cpio and dd.

Answer 14

a

Question 15

103.4 Use streams, pipes and redirects

Answer 15

Key Knowledge Areas:

Redirecting standard input, standard output and standard error.
Pipe the output of one command to the input of another command.
Use the output of one command as arguments to another command.
Send output to both stdout and a file.

Question 16

Redirecting standard input, standard output and standard error.

Answer 16

a

Question 17

Pipe the output of one command to the input of another command.

Answer 17

a

Question 18

Use the output of one command as arguments to another command.

Answer 18

a

Question 19

Send output to both stdout and a file.

Answer 19

a

Question 20

103.5 Create, monitor and kill processes

Answer 20

Key Knowledge Areas:

Run jobs in the foreground and background.
Signal a program to continue running after logout.
Monitor active processes.
Select and sort processes for display.
Send signals to processes.

Question 21

Run jobs in the foreground and background.

Answer 21

a

Question 22

Signal a program to continue running after logout.

Answer 22

a

Question 23

Monitor active processes.

Answer 23

a

Question 24

Select and sort processes for display.

Answer 24

a

Question 25

Send signals to processes.

Answer 25

a

Question 26

103.6 Modify process execution priorities

Answer 26

Key Knowledge Areas:

Know the default priority of a job that is created.
Run a program with higher or lower priority than the default.
Change the priority of a running process.

Question 27

Know the default priority of a job that is created.

Answer 27

a

Question 28

Run a program with higher or lower priority than the default.

Answer 28

a

Question 29

Change the priority of a running process.

Answer 29

a

Question 30

103.7 Search text files using regular expressions

Answer 30

Key Knowledge Areas:

Create simple regular expressions containing several notational elements.
Understand the differences between basic and extended regular expressions.
Understand the concepts of special characters, character classes, quantifiers and anchors.
Use regular expression tools to perform searches through a filesystem or file content.
Use regular expressions to delete, change and substitute text.

Question 31

Create simple regular expressions containing several notational elements.

Answer 31

a

Question 32

Understand the differences between basic and extended regular expressions.

Answer 32

a

Question 33

Understand the concepts of special characters, character classes, quantifiers and anchors.

Answer 33

a

Question 34

Use regular expression tools to perform searches through a filesystem or file content.

Answer 34

a

Question 35

Use regular expressions to delete, change and substitute text.

Answer 35

a

Question 36

103.8 Basic file editing

Answer 36

Key Knowledge Areas:

Navigate a document using vi.
Understand and use vi modes.
Insert, edit, delete, copy and find text in vi.
Awareness of Emacs, nano and vim.
Configure the standard editor.

Question 37

Navigate a document using vi.

Answer 37

a

Question 38

Understand and use vi modes.

Answer 38

a

Question 39

Insert, edit, delete, copy and find text in vi.

Answer 39

a

Question 40

Awareness of Emacs, nano and vim.

Answer 40

a

Question 41

Configure the standard editor.

Answer 41

a