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Now, here's my problem. I'm trying to unlock my encrypted system disk in Ubuntu 10.10. Sometimes I want to enter the passphrase via SSH and sometimes locally. Here's the piece of code that needs to...

So, I made this code, but it's not working and I have no idea why.

#!/bin/sh

read VAR < /dev/input/event3

if [ -n "${VAR}" ]; then
echo "Key pressed"
else
echo "No key pressed"
fi...

None of those solutions will work. It's an initramfs script I'm working on, so there will no X11. I guess there is no simple solution to my problem. Thanks anyway.

I'm trying to write a shell script that runs periodically and if I'm not at the keyboard, it should do one thing, but if I am at the keyboard, it should do another thing. Therefore I've decided that...

So, the delimiter can be any (single-byte) character? I never knew that. Thanks a bunch!:b:

I'm trying to make a sed substitution where the substitution pattern is an environment variable to be expanded, but the variable contains a "slash".
sed -e 's/<HOME_DIRECTORY>/'$HOME'/'This gives me...

Hi! I'm trying to separate text into sentences, like this:
$pattern = "/[A-Z]([a-z]|[[:space:]]|,)*[\.\!\?:]*/";
preg_match_all($pattern, $text, $matches);
This works fine unless the text contains...

I have the $PYTHONSTARTUP variable set to ~/.pythonrc which contains what I need to have tab completion in the python shell, but when I run python nothing happens. It seems the $PYTHONSTARTUP...

"Ett äpple." should match.

Hi! I'm trying to separate text into sentences, like this:
$pattern = "/[A-Z]([a-z]|[[:space:]]|,)*[\.\!\?:]*/";
preg_match_all($pattern, $text, $matches);

This works fine unless the text...

I'm trying to write a script that accepts both arguments and options, e.g.

./script -h 1 -m 15 -s 30
[list of arguments]

or

./script
[list of arguments] -h 1 -m 15 -s 30

I'd like for...

Thanks!

I need to print specific lines from a file, say 2-5, 8, 12-15, 17, 19, 21-27. How do I achieve this?

Nice to know. Thank you.

I solved it
echo ${!BAR}

I have variables:
FOO="Text"
BAR="FOO"

I'd like to be able to evaluate the variable named as the value of $BAR.
echo $FOO
Text

echo $BAR
FOO

This is what I'd like to do:
echo ${$BAR}...

Nice! Thank you!

ThisIsAPascalStyleIdentifier -> This_Is_A_Pascal_Style_Identifier

The problem is that amongst these identifiers are those that already are the correct case, and some of the identifiers have...

I need to separate Pascal style identifiers (TheyLookLikeThis) into words separated by an underscore (_).
I've tried sed 's/[a-z][A-Z]/&_&/' but this won't work (obviously). I'd love some help.

This is actually what I'm trying to do:

Keyword1 Keyword2 IdPrefix_IdBody_IdSuffix

I want to check that "Keyword1" is actually followed by "Keyword2" etc.
Lines like these should be rejected:...

I'm trying to write a small utility for syntax checking. I've tried using Flex/Bison, but these seem too advanced for my task. A simpler tool would be appreciated.

Thank you a lot!

I have a log file with posts looking like this:
[arrival time]-[message]-[id number]

Messages can be delivered by different systems at different times. The id number is used to sort out duplicate...

I have written a small web server in Python, and now I would like to run it on port 80, but in order to be able to bind to a port below 1024 I need to have root privileges. I don't want to run the...

This works perfectly.
echo "command" | netcat 100.100.100.1 8080
Unfortunately I don't have the luxury to assume that every system that needs this will have netcat. Still in trouble.