12-12-2019
Welcome on board,
I think the beginning would be to understand the line of code you posted, first...
what will read do? Why read -p?
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3. High Performance Computing
Hello everyone!
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5. Shell Programming and Scripting
ok the user can only enter a number if a letter is entered it shouldnt be accepted
This is what i have so far
read -p "How many cars to enter:" cars
until
do
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6. Shell Programming and Scripting
Input file
SFSQW 5192.56
HNRNPK 611.486
QEQW 1202.15
ASDR 568.627
QWET 6382.11
SFSQW 4386.3
HNRNPK 100
SFSQW 500
Desired output file
SFSQW 10078.86 3
QWET 6382.11 1
QEQW 1202.15 1
HNRNPK 711.49 2
ASDR 568.63 1
The way I tried: (2 Replies)
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Hello
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10. Shell Programming and Scripting
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timex(1) User Commands timex(1)
NAME
timex - time a command; report process data and system activity
SYNOPSIS
timex [-o] [ -p [-fhkmrt]] [-s] command
DESCRIPTION
The given command is executed; the elapsed time, user time and system time spent in execution are reported in seconds. Optionally, process
accounting data for the command and all its children can be listed or summarized, and total system activity during the execution interval
can be reported.
The output of timex is written on standard error.
OPTIONS
The following options are supported:
-o Report the total number of blocks read or written and total characters transferred by command and all its children. This option
works only if the process accounting software is installed.
-p List process accounting records for command and all its children. This option works only if the process accounting software is
installed. Suboptions f, h, k, m, r, and t modify the data items reported. The options are as follows:
-f Print the fork(2)/ exec(2) flag and system exit status columns in the output.
-h Instead of mean memory size, show the fraction of total available CPU time consumed by the process during its execution.
This ``hog factor'' is computed as (total CPU time)/(elapsed time).
-k Instead of memory size, show total kcore-minutes.
-m Show mean core size (the default).
-r Show CPU factor (user time/(system-time + user-time)).
-t Show separate system and user CPU times. The number of blocks read or written and the number of characters transferred
are always reported.
-s Report total system activity (not just that due to command) that occurred during the execution interval of command. All the data
items listed in sar(1) are reported.
EXAMPLES
Example 1: Examples of timex.
A simple example:
example% timex -ops sleep 60
A terminal session of arbitrary complexity can be measured by timing a sub-shell:
example% timex -opskmt sh
session commands
EOT
ATTRIBUTES
See attributes(5) for descriptions of the following attributes:
+-----------------------------+-----------------------------+
| ATTRIBUTE TYPE | ATTRIBUTE VALUE |
+-----------------------------+-----------------------------+
|Availability |SUNWaccu |
+-----------------------------+-----------------------------+
SEE ALSO
sar(1), time(1), exec(2), fork(2), times(2), attributes( 5)
NOTES
Process records associated with command are selected from the accounting file /var/adm/pacct by inference, since process genealogy is not
available. Background processes having the same user ID, terminal ID, and execution time window will be spuriously included.
SunOS 5.10 14 Sep 1992 timex(1)