Day 6Day 6COP 3502 COP 3502

Day 6Day 6COP 3502 COP 3502

David A. GaitrosDavid A. GaitrosDepartment of Computer ScienceDepartment of Computer Science

Florida State UniversityFlorida State University

Misc Commandsalias [name ['command']]

Desciption: Creates an alias for a command or shows what alias' exist

Options: name - specifies name of aliascommand - Command you

want the alias used for

Examples:alias print "lpr -Plov260"<r>alias finger "ypcat passwd|grep -

i"<r>alias copy "cp" <r>

Demonstration:

Misc. Commandsbc [file]

Desciption: Handy desk calculator. Calculate numbers in a file or directly entered onto the screen.

Options: file - file that contains the bc commands.

Examples:bc <r> 6500 * 34 / 5

<r>Demonstration:

Misc. Commandscal [month][year]

Desciption: Displays a calendar for a month and/or year

Options: month - specifies a numeric monthyear - specifies a numeric year

Examples:cal 2 1955

cal 1955 Demonstration:

Note to self: calendar program is used for appointments. Very primitive method of keeping a schedule.

Misc. Commandscat filename(s)

Desciption: Used to show text files. Displays to whole with no breaks. It is sometimes used to concatenate files together using the redirection feature of UNIX

Options: filename - files you want to display.

Examples: cat file1 file2 file3 > file4

Demonstration:

Misc Commands

clear Desciption: clears the screen.

Used a lot. Does not affect jobs, just clears the screen of clutter.

date Desciption: Lets you see

today's date. Far too many options to really talk about right now.

timeDescription: Tells you how long

it took a command to run.

Misc Commandsecho stuff

options: stuff - a text string

Desciption: Echos the text string to standard output. Usually used inside a shell script or .tcshrc file.

Demonstration:

Misc Commandsmesg [y|n]

Desciption: Lets you control whether other people can use the write command to interrupt you with on screen messages.

Options: [y|n] - self explanotory

Examples: msg n <r>

Demonstration:

Misc. Commandssort [-b][-d][-f][-f][-m][-n[-r][-u][+fields][-o

outputfile] filename

Desciption: Sorts the lines of a text file. Very handy command you may have a need to use. Uses a very efficient sorting algorithm.

Options: -b - ingores spaces-d uses dictionary sort-f ignores capitilization-i ignores non print

characters -m merges two files into

one-n sorts based on number-r sorts in reversed order-u output same line once+fields - file contains

fields seperated by tab characters. -o outputfile - place

results in this filename- filename - file to be

sorts.

Examples: sort -dfro this.out +2

this.int Demonstration:

Misc. Commandsstty [charname char][sane][[-]tostop][-a]

Desciption: Sets the options for your terminal.

Options: charname - specifies the terminal control function you want to see.

char - Specifies the key(s) that you want use for this terminal control character.

sane - Returns terminal to a "sane" state which is useful if your editor dies.

-tostop - Turns off terminal stop mode.

tostop - Turns on terminal stop mode.

-a - displays all settings.

Examples:stty erase '^q'

Demonstration:

Misc. Commandstalk user[@computer]

Desciption: Lets you have a conversation with another user by typing messags to each other. Not that the command mesg must be turned on for this to work.

Options: @computer - use to place the address of the use if they are not located on the same machine.

Examples:talk gaitrosd@diablo.cs.fsu.edu

Demonstration:

Misc. other commands

Vacation [-l]

Description - Automatically responds to incoming messages by telling people you are on vacation. The -l options stores the names of people who in a file called .maillog

wall <r> stuff<r>

Description - Displays a message on the screen of every user on the system. You should never use this. Command is disabled in our system.