This is the README file for Lab2

Here are some shortened definitions of some simple UNIX commands and options... These definitions are according to the integrated manual. (man command)

'w' displays information about the users currently on the machine, and their processes. The header shows, in this order, the current time, how long the system has been running, how many users are currently logged on, and the system load averages for the past 1, 5, and 15 min- utes. The following entries are displayed for each user: login name, the tty name, the remote host, login time, idle time, JCPU, PCPU, and the com- mand line of their current process.

'finger' displays information about the system users Options are: -s Finger displays the user's login name, real name, terminal name and write status (as a ``*'' after the terminal name if write permis- sion is denied), idle time, login time, office location and office phone number. Login time is displayed as month, day, hours and minutes, unless more than six months ago, in which case the year is displayed rather than the hours and minutes. Unknown devices as well as nonexistent idle and login times are displayed as single asterisks. -l Produces a multi-line format displaying all of the information described for the -s option as well as the user's home directory, home phone number, login shell, mail status, and the contents of the files ``.plan'', ``.project'', ``.pgpkey'' and ``.forward'' from the user's home directory. If write permission is denied to the device, the phrase ``(messages off)'' is appended to the line containing the device name. One entry per user is displayed with the -l option; if a user is logged on multiple times, terminal information is repeated once per login. Mail status is shown as ``No Mail.'' if there is no mail at all, ``Mail last read DDD MMM ## HH:MM YYYY (TZ)'' if the person has looked at their mailbox since new mail arriving, or ``New mail received ...'', `` Unread since ...'' if they have new mail. -p Prevents the -l option of finger from displaying the contents of the ``.plan'', ``.project'' and ``.pgpkey'' files. -m Prevent matching of user names. User is usually a login name; how- ever, matching will also be done on the users' real names, unless the -m option is supplied. All name matching performed by finger is case insensitive. If no options are specified, finger defaults to the -l style output if operands are provided. If no arguments are specified, finger will print an entry for each user currently logged into the system. Finger may be used to look up users on a remote machine. The format is to specify a user as ``user@host'', or ``@host''. The -l option is the only option that may be passed to a remote machine.

'Who' - show who is logged on -a, --all same as -b -d --login -p -r -t -T -u -b, --boot time of last system boot -d, --dead print dead processes -H, --heading print line of column headings -l, --login print system login processes --lookup attempt to canonicalize hostnames via DNS -m only hostname and user associated with stdin -p, --process print active processes spawned by init -q, --count all login names and number of users logged on -r, --runlevel print current runlevel -s, --short print only name, line, and time (default) -t, --time print last system clock change -T, -w, --mesg add user's message status as +, - or ? -u, --users list users logged in --message same as -T --writable same as -T --help display this help and exit --version output version information and exit

'Uptime' gives a one line display of the following information. The cur rent time, how long the system has been running, how many users are currently logged on, and the system load averages for the past 1, 5, and 15 minutes. This is the same information contained in the header line displayed by w(1).

'Mv' - move (rename) files Rename SOURCE to DEST, or move SOURCE(s) to DIRECTORY. Mandatory arguments to long options are mandatory for short options too. --backup[=CONTROL] make a backup of each existing destination file -b like --backup but does not accept an argument -f, --force do not prompt before overwriting