I'm kinda new in shell scripting. How do i validate an input from a user to conform to requirement. For example,
echo "Enter First Name: "
read FName
echo "Enter Date of Employment (dd/mm/yyyy): "
read DoE
If the user enters data that is alphanumeric, it accepts it. I hope i've... (1 Reply)
Hi,
How to check whether an input to a shell script contain only numeric values.
Is there any way to check against the following characters.
&
(
)
|
\
"
'
<
>
`
I've used the following way.
echo $1 | grep "\{2\}$"
if
then (12 Replies)
I have a comma delimited file that I need to validate the data in one two columns in.
Sample File:
1234,1234,1234,DESCRIPTION,1,1,2
1234,1234,1234,DESCRIPTION,1,1,2
1234,1234,1234,DESCRIPTION,1,1,2
1234,1234,1234,DESCRIPTION,1,1,2
I need to make sure that the second column's entries are... (3 Replies)
Hi,
I am new to Unix shell scripting and need help to add some validation to an existing script.
I've made a script that takes two argument (input) but I want the script to display an error message when nothing (null) is entered. So far I managed to validate the fist argument but fail to... (2 Replies)
Hi All,
I need to write a small piece of code to check the following.
name should contain (A-Z), spaces, hyphens & apostrophes
I need to generate regular expressions for the same.
Please help me out as i am not familiar with regular expressions. (1 Reply)
Hi,
I want a script to do the following:
1)I want to find all latest files with extension *.doc and write those files to a log file which i did.
my script: find *.doc -mtime -1 -ls > test.log
2) suppose if there is no such latest files extracts script should write "Server... (8 Replies)
Hi,
I need a script which do below
I have one process which runs 24*7 daily and I always has to monitor it now i want to have this automated such that if it stops at anytime we get a exception mail.
For example i use ps -ef|grep 'etl'
above command gives me the desired output.
... (7 Replies)
Hi All
I am trying to validate a value using if condition
requirement is need to check whether its a valid numeric value
the input contains ( space, #N/A and negative and positive decimal values and Zeros)
if it contains the space, I need to display the error message as space
... (15 Replies)
I am learning Shell scripting on own. I am trying to do an assignment to get details from the user like username their individual marks ,DOB and send a report in mail with the Details calculated like total and average.
validate_marks() {
local Value=$1
if &&
then
return 0
else... (1 Reply)
Discussion started by: JayashreeRobin
1 Replies
LEARN ABOUT DEBIAN
ppmtosixel
ppmtosixel(1) General Commands Manual ppmtosixel(1)NAME
ppmtosixel - convert a portable pixmap into DEC sixel format
SYNOPSIS
ppmtosixel [-raw] [-margin] [ppmfile]
DESCRIPTION
Reads a portable pixmap as input. Produces sixel commands (SIX) as output. The output is formatted for color printing, e.g. for a DEC
LJ250 color inkjet printer.
If RGB values from the PPM file do not have maxval=100, the RGB values are rescaled. A printer control header and a color assignment table
begin the SIX file. Image data is written in a compressed format by default. A printer control footer ends the image file.
OPTIONS -raw If specified, each pixel will be explicitly described in the image file. If -raw is not specified, output will default to com-
pressed format in which identical adjacent pixels are replaced by "repeat pixel" commands. A raw file is often an order of magni-
tude larger than a compressed file and prints much slower.
-margin
If -margin is not specified, the image will be start at the left margin (of the window, paper, or whatever). If -margin is speci-
fied, a 1.5 inch left margin will offset the image.
PRINTING
Generally, sixel files must reach the printer unfiltered. Use the lpr -x option or cat filename > /dev/tty0?.
BUGS
Upon rescaling, truncation of the least significant bits of RGB values may result in poor color conversion. If the original PPM maxval was
greater than 100, rescaling also reduces the image depth. While the actual RGB values from the ppm file are more or less retained, the
color palette of the LJ250 may not match the colors on your screen. This seems to be a printer limitation.
SEE ALSO ppm(5)AUTHOR
Copyright (C) 1991 by Rick Vinci.
26 April 1991 ppmtosixel(1)