Unix

LILO? It stands for LInux LOader, is the bootloader for Linux. It allows you to select which installed operating system you want to load.

Process IDs are useful for backgrounded processes in cases where you need to either bring it into the foreground, send it a signal, or terminate/kill it. The reason for this is it's often not a good idea to identify a process by its program name lest there be multiple instances and you wish to address one of them. Process names are hardly unique, but running process IDs are. Thus when trying to background a process it's a good idea to make note of its PID.

Daemons, on the other hand, don't necessarily require you to track its PID, as they are managed by the system's init system. If a daemon is misbehaving or needs management intervention by you, you can, as root, simply ask init, systemd, or whatever your distribution uses to pause or stop the daemon for a moment. Often when changing a daemon's configuration you use your init system to restart the daemon so it runs on the new config.

Do not that daemons and even some other background processes are only under the control of root, or even more extremely, the kernel in kernel space, and you might not be able to do anything with them.

No, Unix is an operating system program. A utility program cannot run by itself; it runs under an operating system.

# SS29

# Script to delete all lines containing the word 'unix' from files supplied as arguments

# Usage: SS29 file1 file2 file3 ...

if [$# -lt 2]

then

echo Insufficient arguments

exit

fi

for file

do

grep -v unix $file>/temp/$file

cp /temp/$file $file

done

Any version of Apache Tomcat should be able to run on Solaris 10. The source is designed to be easily ported to multiple Unix and Unix-like platforms, and even if it weren't, Solaris 10 on x86 offers Linux x86 binary emulation.

In every Unix-like operating systems device files are used as interface to device drivers. Every device is represented in file system with a special file, these special files are called as Device Files.

There are two standard types of device files: character special and block special.

Character special files are used to interface character devices. Character devices transfer data in terms of character. Example of character devices mice, serial modems.

Block special files are used to interface block devices. Block devices transfer data interms of blocks. Example of block devices hard disks, CD-ROMs.

The ".exe" file extension is exclusive to Microsoft products, including MS-DOS and Microsoft Windows. While Solaris does have "executable" files, there is no requirement for those files to have an ".exe" extension. Technically speaking, ".exe" programs run only on Microsoft-based operating systems. Therefore, Solaris does not run ".exe" files.

If you want a job to run only once in the future use the 'at' command.

For more than a one-time execution, use the 'cron' facility with the 'crontab' command to create the schedule. Cron executions are specified one per line, with the following fields:

field allowed values

----- --------------

minute 0-59

hour 0-23

day of month 1-31

month 1-12 (or names, see below)

day of week 0-7 (0 or 7 is Sun, or use names)

The use of an asterisk '*' indicates all possible values. Ranges may be used as well.

An example would be:

15,30 10-12 * 12 * myjob.ksh

Which would run every 15 and 30 minutes past the hour, between 10 a.m. and noon, any day of the month in December on any day of the week, with the job called 'myjob.ksh'

HZ

Some versions of Unix are oriented towards real time applications, and processes in Unix can be "promoted" to real time status if desired. Other than that, you would have to define more precisely what you mean by real time for an operating system.

grep -in '[aeiou]' filename.txt

-i means to ignore case and

-n will give you the line number that the vowel occurs in.

These industries use coal to produce coke--a primary ingredient in the smelting of iron

There is no traditional 'execute' command in Unix.

X Windows

The HOME environment variable has this information.

The 'CD' command is not standard for Unix. The 'cd' command, however, will change directories (folders). It is a means of navigating the Unix file system.

tar extension can more or less be compared to zip: a tarball (this is the name of a "tar extension'ed file") is used to group file (and eventually folders of files).

Although tarballs are mostly used in Unix flavors, programs such as WinRar for Windows can extract files from them.

In short, such drivers may work for both Windows and/or Unix flavors.

The syntax is the only difference. Both accomplish the same thing and if you compare the man pages of these commands, you will see that they are effectively the same text. useradd is the 'standard' UNIX command for adding users, present on solaris, HPUX, etc. mkuser follows aix specific syntax that uses name,value pairs to define the attributes.

The .profile file is used to put any settings or changes to the login shell environment when you log in. This file is only read once during login.

print the contents of a text file onto the screen (like the "type" command in DOS).

In most case statements you cannot be certain how the data will be presented; both n and N mean essentially the same thing, as do y and Y. Therefore, the case statement will check for both variations of the information because they mean the same thing (but in Unix they are case sensitive and would be considered different values otherwise).

There is no list command in Excel to turn on columns. All Excel columns are always on, they just may be hidden. If this does not answer your question, please ask again using words that make it clear what you would like to know, and ensure the question is in the correct category, so you can get a meaningful response.

dd is an abbreviation for "data definition." It is often jokingly said to stand for "destroy data."

echo "enter the 3 numbers"

read a b c

if [ $a -gt $b ]&&[ $a -gt $c ]

then

echo "$a is big"

elif [ $b -gt $c]

then

echo "$b is big"

else

echo "$c is big"

fi

Unix is the most portable operating system there is because it can run on wide variety of environments from PC's to mainframes. Every user has to have an account and security is set on every file and every directory.