Rob's Unix Study Set

Front 1

artificial links

Back 1

An artificial link is a file that contains the name of another file and its complete path. It links to a file that is either on a different file system on the same computer or maybe even on a different computer. These links are called artificial links because the names of the files are not considered by Unix to be the actual file names.

Front 2

awk

Back 2

The awk file-processing utility provides an easy way to state and perform various text manipulation tasks. Using this utility, you can generate reports containing selective columns from a structured text file.

Front 3

backup partition

Back 3

A backup partition is a hard disk partition that is used for backing up file systems and is always encouraged to be larger than the rest of the partitions.

Front 4

Berkeley Software Distribution (BSD)

Back 4

Berkeley Software Distribution (BSD) is a version of Unix developed by researchers at the University of California at Berkeley, who made modifications in Unix and added utilities such as the text editor vi and the C shell. This final version after inclusion of these modifications was named BSD.

Front 5

bin directory

Back 5

The bin directory in the Unix file system contains the most frequently used standard Unix programs and utilities necessary for running the system. The term bin, derived from binary, indicates that the programs are in executable form.

Front 6

boot block

Back 6

The boot block is one of the four sections of the file system. It is termed as block 0 and is the first block of a file system. It is reserved for storing the boot procedures.

Front 7

Bourne shell

Back 7

The Bourne shell is the original command processor developed at AT&T and named after its developer, Stephen R. Bourne. This is the fastest and most widely used shell. The executable file name is sh. The prompt used in this shell is dollar ($).

Front 8

C shell

Back 8

The C shell command processor was developed by William Joy and his colleagues at the University of California at Berkeley. The shell is named after its programming language, which resembles the C programming language syntactically. By default, the percent (%) sign on the terminal displays the C shell. The executable filename is .csh.

Front 9

finger

Back 9

You use this command to retrieve information on all users.

Front 10

finger username

Back 10

You use this command to retrieve information on a specified user.

Front 11

gunzip

Back 11

You use this command to unzip files.

Front 12

gzip

Back 12

You use this command to zip files.

Front 13

id

Back 13

You use this command to display your username and group ID.

Front 14

lp

Back 14

This is a System V command. The common options of this command are -d and -n. You use this command to print a file.

Front 15

lpq

Back 15

This is a BSD command. The common option of this command is -P. You use this command to display print queues.

Front 16

lpr

Back 16

You use this command to print a file.

Front 17

lprm

Back 17

This command is a BSD command. The common option of this command is job number. You use this command to remove print jobs from print queues.

Front 18

lpstat

Back 18

The common options of this command are -s, -l, and -t. You use this command to set file permissions.

Front 19

ls

Back 19

The common options of this command -a, -alr, and -lrt. You use this command to list files.

Front 20

pr

Back 20

You use this command to prepare files for printing.

Front 21

pwd

Back 21

You use this command to display working directories.

Front 22

rm

Back 22

The common options of this command are -f and -r.

Front 23

rmdir

Back 23

You use this command to remove file directories or links.

Front 24

tar

Back 24

The common options of this command are cvf, xvf, and tvf. You use this command to archive and back up files.

Front 25

tee

Back 25

You use this command to send command output to files and the monitors.

Front 26

touch

Back 26

You use this command to create empty files and update the access time.

Front 27

unmask

Back 27

You use this command to set default file creation permissions.

Front 28

uname

Back 28

The common option of this command is -a. You use this command to display information on your machine.

Front 29

Uncompress

Back 29

You use this command to uncompress files.

Front 30

vi

Back 30

You use this command to use the visual text editor.

Front 31

w

Back 31

You use this command to display the tasks that users are currently carrying out on the system.