Wednesday, January 21, 2015

computer vs smartphone which is more advanced

Computer vs. Smartphone

When looking for a computing device, there are many options out there. Today, a decision you may have to think about is whether to purchase a computer or a smartphone. Both can provide computing capabilities, run software and perform other tasks, but there are many factors to consider between the two options. Below is a chart to highlight some of the important factors to consider, including the pros and cons of each.
Topic Computer Smartphone
Power More powerful computing processors typically require greater amounts of power and cooling. Computers are equipped to provide these requirements for processors, thus being able to feature higher computing power overall. Smartphones are more compact and do not have the capability of providing the amount of power and cooling that more powerful processors require. They are limited to lower voltage processors, although processors of this type are becoming more advanced and powerful.
Cost Prices for a computer (desktop or laptop) can vary widely, depending on its capabilities, storage, and features. A more powerful computer will be more expensive, but computer prices can range from $400 to $2000. Cell phones, specifically smartphones, can vary in price based on power and various features, but not as much as computers. Prices can be $150 to $500 in most cases with a contract.
Screen size Desktop computers use monitors with large screen sizes. Standard monitors sizes are between 17" and 19" in most cases, but a desktop computer can connect to even larger display units, like a TV or Projector, allowing for even larger screen sizes. Laptops typically feature screen sizes up to 17". Smartphones, due to their smaller size, feature smaller screen sizes ranging from 2.5" to 4.8", with a few exceptions. To get a bigger screen size (up to 10"), you would have to venture into the tablet market, which can sometimes feature phone call capabilities, but that is not standard.
Portability Desktop computers are not considered to be portable. They are not easy to move around. Laptop computers are considered portable, being more lightweight and easy to place in a backpack, but laptops with larger screens (17") can become bulky and more difficult to carry around, weighing up to seven or eight pounds. Smartphones, while a bit bigger than a standard cell phone, are still more portable than any computer. They are very lightweight and can fit in a purse or pants pocket with ease. They are designed to be taken everywhere with you, thus the very definition of portable.
Storage Computer hard drives are already over one terabyte (TB) and continuing to increase in size. Even the most basic computer comes with a 250 gigabyte (GB) hard drive today. This applies to both desktop and laptop computers. For most people, storage will not be an issue since even 250 GB is more than enough for many users. Some smartphones come with built-in storage, ranging from 8 GB to 64 GB. In some cases, an expansion slot may be available for adding an additional memory chip for more storage capacity. Smartphones, in general, will offer less storage capacity than a computer, but for most users, the storage provided is more than adequate. As memory chips increase in size, so will the storage capacity of a smartphone.
Connectivity Although a computer can connect to a 3G or other phone network, computers do not come with the necessary equipment. Most laptops rely off of a Wi-Fi signal in order to connect to the Internet. Smartphones have a data plan that allows them to be connected to the Internet at all times as long as there is a reception between the phone and cell phone tower.
Operating system Computers come with a more fully featured operating system due to having the computing power and memory requirements. Both desktop and laptop computers can run a fully featured version of an operating system with the option to choose your operating system on PCs. Tablets come with a more slimmed down operating system due to having more limited computing power and memory. The Android OS and Apple iOS are adequate operating systems for tablet users, but not the fully featured operating system found in a computer. Even the Windows operating system found on select smartphones is a slimmed down version of that found on a computer.
Data Entry and user input A computer uses a keyboard for data entry that most users are familiar with and comfortable using. In addition to a keyboard, the mouse is also available for easy scrolling and right-clicking. Smartphones most commonly feature an on-screen touch keyboard that is much smaller than a standard computer keyboard and can be difficult for users to type with, especially users with bigger fingers. Some smartphones feature a slide-out keyboard, with actual keys to press. Again, this keyboard is much smaller than a standard computer keyboard and can still difficult for some users.
Most users today have both a smartphone and computer in their homes and use a smartphone for phone calls, messaging, browsing the Internet, reading e-mail, and other small jobs and then a computer for more complicated projects or work. If you are trying to decide between only a smartphone or a computer also consider a tablet or a hybrid computer, which offers the best of both a laptop and tablet.
Finally, if you're considering a smartphone but don't think you'll use the Internet much we highly recommend purchasing a feature phone instead of a smartphone to avoid the monthly data costs on your phone bill.

Linux Operating System Commands

Linux Operating System Commands

This section lists Linux commands that can help you manage your GroupWise system on Linux. It also helps you create a Linux core file if you need Support assistance with the Linux GroupWise agents.

C.1.1 Basic Commands

The following basic commands are available in GroupWise:
Command
Description
man command
Displays information about any Linux command, including the commands used to start GroupWise programs.
whoami
Displays who you are logged in as.
uname -a
Displays the kernel version, along with other useful information
eject
Ejects the CD from the drive.

C.1.2 File and Directory Commands

The following file and directory commands are available in GroupWise:
Command
Description
pwd
Displays your current directory (“print working directory”).
ls -l
Lists the files in the current directory, along with useful information about them.
ls -al
Includes hidden system files (those whose names start with a dot) in the list.
more filename
Pages through the contents of a file (forward only).
less filename
Pages through the contents of a file and lets you page back up through the file.
tail filename
Displays the last 10 lines of a file. This is helpful for log files. (The head commands displays the first 10 lines.)
cp source destination
Copies a file or directory.
mv source destination
Moves or renames a file or directory.
find starting_directory -name filename
Find the specified file, starting in the specified directory. Specifying / would start the find operation in the root directory.
grep string file
Searches the specified file for the specific string of characters. This is useful for locating specific information in GroupWise agent startup files.
mkdir directory_name
Creates a new directory
rmdir directory_name
Deletes an empty directory
rm filename
Deletes a file
rm -r directory_name
Deletes a directory and recursively deletes its contents.
cat filename
Displays a file.
cat filename /printer_device
Prints a file.

C.1.3 Process Commands

The following process commands are available in GroupWise:
Command
Description
top
Lists all processes, sorted by CPU percentage with the highest at the top of the list.
ps -eaf | grep program
Lists all processes and their IDs associated with the specified program. Wildcard characters can be used to list a group of related programs (for example, gw*).
ps -aux | grep username
Lists all processes and their IDs associated with the specified user.
kill process_ID
Stops the specified process like a normal exit.
kill -9 process_ID
Stops the specified process after it has failed to exit normally. Temporary files are not cleaned up.
killall program
Kills all processes associated with the specified program.
xkill
Closes the window that you click on with the resulting box-shaped cursor.

C.1.4 Disk Usage Commands

The following disk usage commands are available in GroupWise:
Command
Description
df
Lists file system disk space usage in terms that make sense to your computer.
df -h
Lists file system disk space usage in terms that make sense to humans.
du
Lists disk space usage of each subdirectory below your current working directory
du -s
Lists the cumulative disk space usage of your current working directory.
du -s file_or_directory
Lists the disk space usage for a file or the cumulative disk space usage for a directory and its contents.

C.1.5 Package Commands

The following package commands are available in GroupWise:
Command
Description
rpm -qa | grep novell
Lists all Novell packages installed on your server
rpm -qi package_name
Lists useful information about an installed package, such as name, version, release date, install date, size description, build date, and so on.
rpm -ql package_name
Lists where each file in the package has been installed
rpm -e package_name
Uninstalls a package

C.1.6 File System Commands

The following file system commands are available in GroupWise:
Command
Description
mount
Lists the file systems that are currently mounted on your server.
mount -t ncpfs //NetWare_server_DNS_name       /mountpoint_directory       -o user=username       -o ipserver=server_IP_address        -o server=server_hostname
Mounts a NetWare server as a file system on your Linux server.
mount -t smbfs //Windows_server_name/share        /mountpoint_directory        -o username=username
Mounts a Windows server as a file system on your Linux server.

C.1.7 Network Commands

The following network commands are available in GroupWise:
Command
Description
ifconfig -a
Lists the IP address and other detailed information about the NIC in your Linux server.
hostname
Displays the hostname of your server.
dig
Displays host information about your server
netstat -lnp | grep program netstat -lnp | egrep ‘program|program|...'
Lists the port numbers in use by one or more programs. It is also a handy command for checking to see whether the specified programs are currently running.
ping IP_address_or_hostname
Checks to see if the specified server is responding on the network.

post beeb codes



POST Beep Codes

When you turn the computer on, it performs Power On System Test (POST), during which it checks and initializes the system's internal components.
If a serious error occurs, the computer does not display a message but emits a series of long and short beeps instead.
Beeps are your computer's way of letting you know what's going on when the video signal is not working.
These codes are built in to the BIOS of the PC.
There is no official standard for these codes due to the many brands of BIOS that are out there.

To decode the meaning of your computer POST beep codes you must consult the manual of your motherboard.
If you don't have a motherboard manual or if it's incomplete you must search on the site of your computer manufacturer.
Another way is take off the computer case and look for BIOS manufacturer (just see if it says "AMI" or "Phoenix" ...)..
Once you have determined your BIOS make, consult the following tables to see what's wrong with your computer.
http://www.technick.net/images/dot02.jpgAmerican Megatrends' AMI BIOS GO UP
Beeps
Descriptions
1
The memory refresh circuitry has failed
2
Parity errors have been detected in the first 64 KB of memory
3
A failure has occurred within the first 64 KB or memory
4
System Timer failure: Timer 1 on the mainboard does not work properly
5
The CPU has generated an undetectable error
6
8042 Gate-A20 failure: BIOS cannot switch the CPU into protected mode
7
The CPU has generated an exception error
8
The video adapter is missing, or the memory on the adapter has generated a failure
9
The ROM checksum value does not match the value in BIOS
10
The shutdown register for CMOS interrupt channel 2 has failed POST; the system board cannot retrieve CMOS contents during POST
11
Level-2 cache memory has failed the tests, and has been disabled
2 short
POST has failed, caused by a failure of one of the hardware tests
1 long, 2 short
Failure in video system: a checksum error was encountered in video BIOS ROM, or a horizontal retrace failure has been encountered
1 long, 3 short
Failure in video system: the video DAC, the monitor detection procedure or the video RAM has failed
1 long
POST procedures have passed

http://www.technick.net/images/dot02.jpgAMI BIOS GO UP
The following are AMI BIOS Beep Codes that can occur. However because of the wide variety of different computer manufacturers with this BIOS the beep codes may vary.
Beep Code
Descriptions
1 short
DRAM refresh failure
2 short
Parity circuit failure
3 short
Base 64K RAM failure
4 short
System timer failure
5 short
Process failure
6 short
Keyboard controller Gate A20 error
7 short
Virtual mode exception error
8 short
Display memory Read/Write test failure
9 short
ROM BIOS checksum failure
10 short
CMOS shutdown Read/Write error
11 short
Cache Memory error
1 long, 3 short
Conventional/Extended memory failure
1 long, 8 short
Display/Retrace test failed

http://www.technick.net/images/dot02.jpgAST Research BIOS GO UP
Long Beep
Short Beep
Descriptions
0
1
Low level processor verification test failed (POST 1)
0
2
Clearing keyboard controller buffers failed (POST 2)
0
3
Keyboard controller reset failed (POST 3)
0
4
Low level keyboard controller interface test (POST 4)
0
5
Reading data from keyboard controller failed (POST 5)
0
6
System board support chip initialization failed (POST 6)
0
7
Processor register read/write verify test failed (POST 7)
0
8
CMOS timer initialization failed (POST 8)
0
9
ROM BIOS checksum test failed (POST 9)
0
10
Initialize primary video (POST 10)
0
11
8254 timer channel 0 test failed (POST 11)
0
12
8254 timer channel 1 test failed (POST 12)
0
13
8254 timer channel 2 test failed (POST 13)
0
14
CMOS power-on and time test failed (POST 14)
0
15
CMOS shutdown byte test failed (POST 15)
1
0
DMA channel 0 test failed (POST 16)
1
1
DMA channel 1 test failed (POST 17)
1
2
DMA page register test failed (POST 18)
1
3
Keyboard controller interface test failed (POST 19)
1
4
Memory refresh toggle test failed (POST 20)
1
5
First 64 KB memory test failed (POST 21)
1
6
Setup interrupt vector table failed (POST 22)
1
7
Video initialization failed (POST 23)
1
8
Video memory test failed (POST 24)

http://www.technick.net/images/dot02.jpgAST Enhanced BIOS GO UP
Short Beep
Long Beep
Short Beep
Descriptions
3
1
-
Flash loader failure
3
2
-
Failure in system board component
3
3
-
Failure in system board component
3
4
-
Memory failure
3
5
-
Video failure
0
6
-
Flash BIOS update error
-
2
x
AST low level diagnostics

http://www.technick.net/images/dot02.jpgAST Phoenix BIOS GO UP
Beeps
Descriptions
1-1-3
CMOS read/write failure
1-1-4
ROM BIOS checksum failure
1-2-1
Programmable interval timer failure
1-2-2
DMA initialization failure
1-2-3
DMA page register read/write failure
1-3-1
RAM refresh verification failure
1-3-3
First 64 KB RAM chip or data or data line failure
1-3-4
First 64 KB RAM odd/even logic failure
1-4-1
First 64 KB RAM address line failure
1-4-2
First 64 KB RAM parity failure
2-1-1
First 64 KB RAM failure bit 0
2-1-2
First 64 KB RAM failure bit 1
2-1-3
First 64 KB RAM failure bit 2
2-1-4
First 64 KB RAM failure bit 3
2-2-1
First 64 KB RAM failure bit 4
2-2-2
First 64 KB RAM failure bit 5
2-2-3
First 64 KB RAM failure bit 6
2-2-4
First 64 KB RAM failure bit 7
2-3-1
First 64 KB RAM failure bit 8
2-3-2
First 64 KB RAM failure bit 9
2-3-3
First 64 KB RAM failure bit A
2-3-4
First 64 KB RAM failure bit B
2-4-1
First 64 KB RAM failure bit C
2-4-2
First 64 KB RAM failure bit D
2-4-3
First 64 KB RAM failure bit E
2-4-4
First 64 KB RAM failure bit F
3-1-1
Slave DMA register failure
3-1-2
Master DMA register failure
3-1-3
Slave interrupt mask register failure
3-1-4
Slave interrupt mask failure
3-2-4
Keyboard controller test failure
3-3-4
Screen memory test failure
3-4-1
Screen initialization failure
3-4-2
Screen retrace test failure
3-4-3
Failure searching for video ROM
4-2-1
No timer tick
4-2-3
Gate-A20 failure
4-2-4
Unexpected interrupt in protected mode

http://www.technick.net/images/dot02.jpgWINBIOS GO UP
Beeps
Error Message
Description
Resolution
1
Refresh Failure
The memory refresh circuitry is faulty.
Reseat the memory SIMMs. If the system still beeps, replace the memory.
2
Parity Error
Parity error in the base memory (the first 64 KB block) of memory.
Reseat the memory SIMMs. If the system still beeps, replace the memory.
3
Base 64 KB Memory Failure
Memory failure in first 64 KB.
Reseat the memory SIMMs. If the system still beeps, replace the memory.
4
Timer Not Operational
A memory failure in the first 64 KB of memory, or Timer 1 is not functioning.
The motherboard must be replaced.
5
Processor error 8042 - Gate A20 Failure
The CPU generated an error.
The motherboard must be replaced.
6
8042 - Gate A20 Failure Processor Exception Interrupt Error
Cannot switch to protected mode.
Try a different keyboard, or replace the keyboard fuse, if the keyboard has one.
7
Processor Exception Interrupt Error
The CPU on the CPU Card generated an exception interrupt.
The motherboard must be replaced.
8
Display Memory Read/Write Error
The system video adapter is either missing or its memory is faulty. This is not a fatal error.
There is a memory error on the video adapter. Replace the video adapter, or the RAM on the video adapter.
9
ROM Checksum Error
The ROM checksum value does not match the value encoded in WINBIOS.
The BIOS ROM chip is bad. The system probably needs a new BIOS ROM chip.
10
CMOS Shutdown Register Read/Write Error
The shutdown register for CMOS RAM has failed.
The motherboard must be replaced.
11
Cache memory bad - do not enable cache
The cache memory test failed. Cache memory is disabled. Do not press Ctrl/Alt/Shift <+> to enable cache memory.
The motherboard must be replaced.

http://www.technick.net/images/dot02.jpgAWARD BIOS GO UP
The following are Award BIOS Beep Codes that can occur. However because of the wide variety of different computer manufacturers with this BIOS the beep codes may vary.
Beep Code
Descriptions
1 long, 2 short
Indicates a video error has occurred and the BIOS cannot initialize the video screen to display any additional information
Any other beep(s)
>RAM problem.

If any other correctable hardware issues the BIOS will display a message.
http://www.technick.net/images/dot02.jpgIBM BIOS GO UP
The following are IBM BIOS Beep Codes that can occur. However because of the wide variety of models shipping with this BIOS the beep codes may vary.
Beep Code
Descriptions
No Beeps
No Power, Loose Card, or Short.
1 Short Beep
Normal POST, computer is ok.
2 Short Beep
POST error, review screen for error code.
Continuous Beep
No Power, Loose Card, or Short.
Repeating Short Beep
No Power, Loose Card, or Short.
One Long and one Short Beep
Motherboard issue.
One Long and Two short Beeps
Video (Mono/CGA Display Circuitry) issue.
One Long and Three Short Beeps.
Video (EGA) Display Circuitry.
Three Long Beeps
Keyboard / Keyboard card error.
One Beep, Blank or Incorrect Display
Video Display Circuitry.

http://www.technick.net/images/dot02.jpgMACINTOSH STARTUP TONES GO UP
TONES
ERROR
Error Tone. (two sets of different tones)
Problem with logic board or SCSI bus.
Startup tone, drive spins, no video
Problem with video controller.
Powers on, no tone.
Logic board problem.
High Tone, four higher tones.
Problem with SIMM.

http://www.technick.net/images/dot02.jpgPHOENIX BIOS GO UP
PHOENIX BIOS Q3.07 OR 4.X
Beep Code
Descriptions / What to Check
1-1-1-3
Verify Real Mode.
1-1-2-1
Get CPU type.
1-1-2-3
Initialize system hardware.
1-1-3-1
Initialize chipset registers with initial POST values.
1-1-3-2
Set in POST flag.
1-1-3-3
Initialize CPU registers.
1-1-4-1
Initialize cache to initial POST values.
1-1-4-3
Initialize I/O.
1-2-1-1
Initialize Power Management.
1-2-1-2
Load alternate registers with initial POST values.
1-2-1-3
Jump to UserPatch0.
1-2-2-1
Initialize keyboard controller.
1-2-2-3
BIOS ROM checksum.
1-2-3-1
8254 timer initialization.
1-2-3-3
8237 DMA controller initialization.
1-2-4-1
Reset Programmable Interrupt Controller.
1-3-1-1
Test DRAM refresh.
1-3-1-3
Test 8742 Keyboard Controller.
1-3-2-1
Set ES segment to register to 4 GB.
1-3-3-1
28 Autosize DRAM.
1-3-3-3
Clear 512K base RAM.
1-3-4-1
Test 512 base address lines.
1-3-4-3
Test 512K base memory.
1-4-1-3
Test CPU bus-clock frequency.
1-4-2-4
Reinitialize the chipset.
1-4-3-1
Shadow system BIOS ROM.
1-4-3-2
Reinitialize the cache.
1-4-3-3
Autosize cache.
1-4-4-1
Configure advanced chipset registers.
1-4-4-2
Load alternate registers with CMOS values.
2-1-1-1
Set Initial CPU speed.
2-1-1-3
Initialize interrupt vectors.
2-1-2-1
Initialize BIOS interrupts.
2-1-2-3
Check ROM copyright notice.
2-1-2-4
Initialize manager for PCI Options ROMs.
2-1-3-1
Check video configuration against CMOS.
2-1-3-2
Initialize PCI bus and devices.
2-1-3-3
Initialize all video adapters in system.
2-1-4-1
Shadow video BIOS ROM.
2-1-4-3
Display copyright notice.
2-2-1-1
Display CPU type and speed.
2-2-1-3
Test keyboard.
2-2-2-1
Set key click if enabled.
2-2-2-3
56 Enable keyboard.
2-2-3-1
Test for unexpected interrupts.
2-2-3-3
Display prompt "Press F2 to enter SETUP".
2-2-4-1
Test RAM between 512 and 640k.
2-3-1-1
Test expanded memory.
2-3-1-3
Test extended memory address lines.
2-3-2-1
Jump to UserPatch1.
2-3-2-3
Configure advanced cache registers.
2-3-3-1
Enable external and CPU caches.
2-3-3-3
Display external cache size.
2-3-4-1
Display shadow message.
2-3-4-3
Display non-disposable segments.
2-4-1-1
Display error messages.
2-4-1-3
Check for configuration errors.
2-4-2-1
Test real-time clock.
2-4-2-3
Check for keyboard errors
2-4-4-1
Set up hardware interrupts vectors.
2-4-4-3
Test coprocessor if present.
3-1-1-1
Disable onboard I/O ports.
3-1-1-3
Detect and install external RS232 ports.
3-1-2-1
Detect and install external parallel ports.
3-1-2-3
Re-initialize onboard I/O ports.
3-1-3-1
Initialize BIOS Data Area.
3-1-3-3
Initialize Extended BIOS Data Area.
3-1-4-1
Initialize floppy controller.
3-2-1-1
Initialize hard-disk controller.
3-2-1-2
Initialize local-bus hard-disk controller.
3-2-1-3
Jump to UserPatch2.
3-2-2-1
Disable A20 address line.
3-2-2-3
Clear huge ES segment register.
3-2-3-1
Search for option ROMs.
3-2-3-3
Shadow option ROMs.
3-2-4-1
Set up Power Management.
3-2-4-3
Enable hardware interrupts.
3-3-1-1
Set time of day.
3-3-1-3
Check key lock.
3-3-3-1
Erase F2 prompt.
3-3-3-3
Scan for F2 key stroke.
3-3-4-1
Enter SETUP.
3-3-4-3
Clear in-POST flag.
3-4-1-1
Check for errors
3-4-1-3
POST done--prepare to boot operating system.
3-4-2-1
One beep.
3-4-2-3
Check password (optional).
3-4-3-1
Clear global descriptor table.
3-4-4-1
Clear parity checkers.
3-4-4-3
Clear screen (optional).
3-4-4-4
Check virus and backup reminders.
4-1-1-1
Try to boot with INT 19.
4-2-1-1
Interrupt handler error.
4-2-1-3
Unknown interrupt error.
4-2-2-1
Pending interrupt error.
4-2-2-3
Initialize option ROM error.
4-2-3-1
Shutdown error.
4-2-3-3
Extended Block Move.
4-2-4-1
Shutdown 10 error.
4-3-1-3
Initialize the chipset.
4-3-1-4
Initialize refresh counter.
4-3-2-1
Check for Forced Flash.
4-3-2-2
Check HW status of ROM.
4-3-2-3
BIOS ROM is OK.
4-3-2-4
Do a complete RAM test.
4-3-3-1
Do OEM initialization.
4-3-3-2
Initialize interrupt controller.
4-3-3-3
Read in bootstrap code.
4-3-3-4
Initialize all vectors.
4-3-4-1
Boot the Flash program.
4-3-4-2
Initialize the boot device.
4-3-4-3
Boot code was read OK.