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Full Discussion: Unix Shell basic loop massive n00b
Top Forums Shell Programming and Scripting Unix Shell basic loop massive n00b Post 302552129 by thurft on Thursday 1st of September 2011 04:50:34 PM
Old 09-01-2011
Quote:
Originally Posted by Corona688
grep "^${ID}:" users.db > /dev/null then. ^ means beginning of the line.
thank you!!

Another question:

how would i be a really cool way (the way u do it) to retrive the one b4 the last ":".
Shall i use "cut" and "tr" or there is an easier way?

also how could i save it to an array? ( you will prob know how to do it in 1 step and i would do it in 300)

Thank you so much!!... you prob saved me 4 hrs trying to figure it out and it would never look as neat!

---------- Post updated at 03:38 PM ---------- Previous update was at 03:27 PM ----------

Btw i ran the program and it returns an error after i written down the string
Quote:
1: line 5 p: [missing ']'
and it doesnt show any message
why is that?

---------- Post updated at 03:50 PM ---------- Previous update was at 03:41 PM ----------

Quote:
#!/bin/bash
while true
do
read -p "Please enter staff ID: " cSID
if [ "${#cSID}" -ne 3]
then
echo "wrong number of digits"
continue
fi

if ! [ -z "${cSID/[0-9]*/}" ]
then
echo "Not all digits"
continue
fi

if grep "^${cSID}:" users.db > /dev/null
then
echo "The string '$cSID' exists anywhere at all in users.db"
continue
fi
break # get out of loop
done
Last edited by thurft; 09-01-2011 at 05:50 PM..
 

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grub-render-label

GRUB-RENDER-LABEL(1)                                               User Commands                                              GRUB-RENDER-LABEL(1)

NAME

       grub-render-label - generate a .disk_label for Apple Macs.

SYNOPSIS

       grub-render-label [OPTION...] [OPTIONS]

DESCRIPTION

       Render Apple .disk_label.

       -b, --bgcolor=COLOR
              use COLOR for background

       -c, --color=COLOR
              use COLOR for text

       -f, --font=FILE
              use FILE as font (PF2).

       -i, --input=FILE
              read text from FILE.

       -o, --output=FILE
              set output filename. Default is STDOUT

       -t, --text=STRING
              set the label to render

       -v, --verbose
              print verbose messages.

       -?, --help
              give this help list

       --usage
              give a short usage message

       -V, --version
              print program version

       Mandatory or optional arguments to long options are also mandatory or optional for any corresponding short options.

REPORTING BUGS

       Report bugs to <bug-grub@gnu.org>.

SEE ALSO

       The  full  documentation  for grub-render-label is maintained as a Texinfo manual.  If the info and grub-render-label programs are properly
       installed at your site, the command

              info grub-render-label

       should give you access to the complete manual.

grub-render-label (GRUB) 2.02-2ubuntu8.3                             July 2018                                                GRUB-RENDER-LABEL(1)
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