Unix

Use "man time" in a Linux terminal (without the quotes) to view the manual page for time. There are commands to show elapsed time a program runs, when a program is to start, etc. For a simple example, this 'Egg Timer' command: echo -e '\a' >&2; sleep 180; echo -e '\a' >72 will show a blank terminal for 180 seconds. Or 3 minutes, (which is enough to cook a soft-boiled egg!).

A server daemon is a program that runs in the background and provides some sort of service, such as a web server, SSH server, or a database server.

"posix" is a latest version of a operating system of "unix",published by ieee 1003.2 standard.

Specifically, it's an acronym for Portable Operating Systems Interface. When used, it should specify which version of the specification is being referenced. E.g. POSIX.1-2008 is the latest.

A cache allows one to retrieve commonly used information very quickly (if it is still in the cache) rather than trying to find it on the system (which takes much longer).

The disadvantage is that is takes away memory from the system to implement the cache.

# calculate simple interest for 3 sets of p,n and r

count=1

while [ count -le 3 ]

do

echo "\n enter the values of p,n and r\c"

read p n r

si='echo $p\*$n\*$r/100|bc'

echo simple interest = Rs. $si

count='expr $count+1'

done

using the command # errpt

If your user name is tom it would be /home/tom or if your user name is Mary it would be /home/Mary

To copy the file from source to target as well as preserve the permissions by writing next to cp '-p'

The OS is telling you that it has lost the ability to write data to the printer. This is normally caused by some sort of corruption in the system.

I would try deleting the print job and trying again. If that does not work delete the printer and enable it again. If that does not work reboot the computer and restart the printer. The last step is to reinstall the printer drivers.

for i in *.c
do
mv $i $i.old
done

The 'touch' command creates a new empty file in Unix.

Recursive program/function/... is something that executes/invokes itself.

For example rm -rf will delete everything in a directory, also invoking "rm -rf" on every folder in this directory.

Ash

Isochoric process is a process in which change in pressure and temperature takes place in such a way that the volume of the system remains constant.

ls --> will list the files and directories

but

ls -a --> will list the hidden files too,

by

Dhanush M

The mesg command displays the current state of messaging (write, talk, etc.) for a user. You can also use it to turn on and off messaging (mesg y, mesg n).

The GNOME Display Manager (GDM) and KDE Display Manager (KDM) are X display managers that allows a user to start an X session on an X server.

In other words, the display manager shows the login screen when nobody is logged in. After it checks your username and password, it hands off the work to the actual display manager (e,g, GNOME, KDE, Xfce, LXDE).

GDM uses the GTK windowing toolkit, while KDM uses the KDE counterpart, Qt.

For any Unix or Linux based operating system, make the text file readable and executable and then invoke (call) it by the file name, which will execute the script.

Your question is uncleear; every time you start the 'vi' editor you get another process.

If for example we wanted to make i subdirictory called foo

in Linux or UNIX it you use

mkdir foo

to change into it you would use

CD foo

to remove the directory

rmdir foo

but this will only work if the directory is empty

to remove the directory called foo when it is not empty use

rm -rf foo

but please be sure this is what you really want to do.

Solaris

pwd

You need to supply the possible answers you are looking for. In general, * ? + . etc are wildcard characters, along with [] for set inclusions, etc.