I would like to write shell/perl script which identifies the top unix processes that are performing high disk I/O's or/and writes
If any one knows the solution please help me?
-Swamy (0 Replies)
Guys,
Is there any UNIX command that captures the 'Unix process which is performing high disk I/O reads and writes'.
can you help me in this?
-Swamy (6 Replies)
Hello,
I would like to free some space to install gcc with is about 50M large, and I have no free space on my system. What can I delete?
Filesystem 1024-blocks Used Free %Used Iused Ifree %Iused Mounted on
/dev/hd4 262144 145436 116708 56% 7981 ... (10 Replies)
Hi,
I have a failed hard disk in my Sun Fire V240. Unfortunately it does not show up in 'cfgadm -al' or in the format command so I cannot unconfigure it and illuminate the blue light on the front to identify it. Is there any way of iluminating the blue lights on the other disks so I can at... (3 Replies)
Hi,
I would like to create the new file system(mount point) in our unix server.
before that i would like to know the total free space available in /home directory.
Can you please let me know, how to find free space available for new filesystem?
Be careful with your spelling and... (2 Replies)
Good Evening,
2 years ago, I set up an Ubuntu file-server for a friend, who is a photograph amateur. Basically, the server offers a software RAID-5 that can be accessed remotely from a MAC. Unfortunately, I didn't labeled the hard drives (i.e. which physical drive corresponds to the /dev/sdX... (2 Replies)
Hello,
Currently we have a Oracle X4100 ( Solaris 10 ) server with disk failure. Originally our hardware team thought the disk can be hot-swap, when they stood in front of the server, none of the disk failure LED were on, so now we have no idea which disk is the bad one for replacement.
As... (2 Replies)
Hi,
I have broken my laptop hard drive so I would like to put it in an external box to backup my documents.
I have a doubt whether the interface of the hard disk is sata or ide.
Inside notes attached, is reported "controller SATA AHCI" but on the model section is given IDE hard disk
... (1 Reply)
I am working on VM host and collecting data to identify the type of storage attached to the server which will be migrated to VNX.
it has one ldom created on it
luxadm probe output ---
No Network Array enclosures found in /dev/es
Found Fibre Channel device(s):
Node... (7 Replies)
Discussion started by: kpatel786
7 Replies
LEARN ABOUT OSF1
sum
sum(1) General Commands Manual sum(1)NAME
sum - Displays the checksum and byte count in block-size (1024) units of a file
SYNOPSIS
sum [-o | -r] [file...]
The sum command reads file and calculates a 16-bit checksum and the byte count in block-size (1024) units in the file. If the file argu-
ment is omitted, sum reads standard input.
STANDARDS
Interfaces documented on this reference page conform to industry standards as follows:
sum: XCU5.0
Refer to the standards(5) reference page for more information about industry standards and associated tags.
OPTIONS
[Tru64 UNIX] Uses an algorithm to compute the checksum using word-by-word computation. Uses an alternate algorithm to compute the check-
sum (rigorous byte-by-byte computation rather than the word-by-word computation).
[Tru64 UNIX] This is the default.
OPERANDS
The file for which a checksum is to be computed. If this operand is omitted, standard input is used.
DESCRIPTION
The checksum and number of blocks are written to standard output. The sum command is generally used to determine if a file that was copied
or communicated over transmission lines is an exact copy of the original. The sum command writes the space used in 1024-byte units.
[Tru64 UNIX] The checksum is calculated using a rigorous byte-byte computation by default.
System V Compatibility
[Tru64 UNIX] The checksum algorithms for the default sum command and the SVID 2 compliant sum command are reversed. The SVID 2 compliant
sum command uses the word-by-word algorithm by default and uses the byte-by-byte algorithm if you specify the -r option on the command
line.
NOTES
The sum utility is marked LEGACY in XCU Issue 5. [Tru64 UNIX] The default algorithm is no longer the word-by-word computation algorithm.
It was changed to the 4.3BSD default algorithm. The algorithms used may not be portable, that is, the same checksum may not be produced
for the same input on different systems. Portable applications should use cksum.
EXIT STATUS
The following exit values are returned: Successful completion. An error occurred.
EXAMPLES
To display the checksum of datafile and the number of blocks in this file, enter: sum datafile
If the checksum of datafile is 1605 and if the file contains 3 blocks, sum displays: 1605 3 datafile
ENVIRONMENT VARIABLES
The following environment variables affect the execution of sum: Provides a default value for the internationalization variables that are
unset or null. If LANG is unset or null, the corresponding value from the default locale is used. If any of the internationalization vari-
ables contain an invalid setting, the utility behaves as if none of the variables had been defined. If set to a non-empty string value,
overrides the values of all the other internationalization variables. Determines the locale for the interpretation of sequences of bytes
of text data as characters (for example, single-byte as opposed to multibyte characters in arguments). Determines the locale for the for-
mat and contents of diagnostic messages written to standard error. Determines the location of message catalogues for the processing of
LC_MESSAGES.
SEE ALSO
Commands: cksum(1), wc(1)
Standards: standards(5)sum(1)