Language: Bash

Purpose: Automate generation of SSH key files (id_rsa & id_rsa.pub for example), for use with passwordless SSH authentication.

Notes: This is a modified version of a script I have on my blog, http://www.itknowledgeexchange.com/security-admin/ (direct link: http://itknowledgeexchange.techtarget.com/security-admin/bash-script-for-ssh-key-generation/ ) as I feel the automated version is a lot more resourcesful.

#!/bin/bash

# Make sure input is not printed to screen (since we are typing in a password after all)
stty -echo
read -p “Passphrase: ” pp
stty echo

# ssh-keygen prohibits passphrases < 4 characters
if [ "${#pp}" -lt 4 ]; then
    echo -e “nPassphrase must be greater than 4 characters.”
    exit 1
fi

# man ssh-keygen specifies that for RSA, 2048-bit keys are considered efficient.
bits=2048

# Debatable whether DSA or RSA is really more secure here, but RSA is more of the standard when it comes to this
enc=”rsa”

# Default path where all keys are stored
kf=”$HOME/.ssh/id_$enc”

# Check to see if the file exists first (if so, delete it)
echo -n “Checking to see if $kf exists (deleting if so)…”

if [ -e "$kf" ]; then
    rm -rf $kf
fi

echo -e -n “done.nGenerating a $bits bit $enc key file for SSH ($kf)…”

ssh-keygen -q -b $bits -t $enc -N $pp -f “$kf”

if [ -e "$kf" ]; then
    echo “done.”
else
    echo “error.”
fi

exit 0
[/pre]

Cf. UNIX Power Tools, page 175.
This works in tcsh, but no in bash.
In bash I get this message:
ff CH18
find: paths must precede expression
Usage: find [-H] [-L] [-P] [expression]

Any assistance would be appreciated.

Regards

I have added the following command to the rc.local file in Puppy Linux which runs every time Puppy Linux boots up:

cat /usr/share/foo2zjs/firmware/sihp1020.dl > /dev/usb/lp0

This works fine if the printer is on when I boot into Puppy Linux. If the printer is not on when I boot up then I have to run the code in a shell before the printer will print.

This is OK for me but my family members need to be able to just turn on the printer any time and have it print. They do not even know what a shell is and cannot be expected to issue shell commands to get the printer to work.

My question is this:

Can I put the above code in a script that will execute every time the USB printer is turned on?

Knowing the kind of operating system that Linux is, I am sure that there is a way to do this. I’m just not skilled enough to know how to do it.

Any help would be much appreciated.

bdika

Thanks.

This is where I got stuck.
curday=`date +%d`
month=`date|cut -d’ ‘ -f2`
echo $month $curday
ps -ef|grep oracleprod | tr -s ” ” : | cut -d: -f3,6,7