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This would require at least 3 arguments though, correct? Because if you only provided 2, the script wouldn't know which 2 arguments they are for and most likely use the first two options. Right? Or...

@bartus11
Would it be safer to put double quotes around the $4?:

...
if [ -z "$4" ]; then
...


@jlliagre
What exactly does "${4:+-d $4}" mean? Can this be applied to the other arguments...

Here is my script:


#!/bin/ksh

usage ()
{
echo " Usage: $0 <opt1> <opt2> <opt3> <opt4>"
}

if [ $# -lt 3 ]; then
usage
exit;
fi

prog -a $1 -b $2 -c $3 -d $4...

The command is:

sic -h irc.freenode.net 2>&1 | tee -a irc.log

Where sic is an IRC client, and I'm piping the output to tee in order to log my IRC sessions.

I'm trying to handle reconnects by...

set: no tw option: 'set all' gives all option values.

I've tried this already and found out it was for vim, not vi :(

":%!fold -w80" works, but it cuts off words. I don't want it to cut off...

I just typed several long lines into vi but I only want it to have 80 columns. How can I set this in vi?

I do not know if my system uses MD5 for password hashes - the MD5 hash I am testing is just a hash generated by a PHP script I think - I just Googled 'MD5 encrypter' and used one of the links there...

I am trying to use John the Ripper but it doesn't take regular MD5 hashes, only shadow MD5 hashes. For example this hash: 900150983cd24fb0d6963f7d28e17f72 (which, decrypted, is 'abc') within a text...

So I am trying to convert my bash script into ksh, and this is what I have in the file so far:


#!/bin/ksh

login()
{
if [ "$ALPHA" = "" ]
then
sendcmd BETA
else
sendcmd...

Say I have a text file like:


1
3
4


How would I use ksh to put the number '2' into the second line of that file? I'm using OpenBSD so the sed syntax might be a bit different (I have no...

Okay so I have an alias that looks like this:


ALIAS gscn {
MSG gscn Test1
MSG gscn Test2
MSG gscn Test3
MSG gscn Test4
MSG gscn Test5
}


How do I make it wait 5 seconds between each...

When I connect to any IRC server, it's usually my ISP IP address/hostname. I own a domain, but I'm not using it for anything (no web hosting service or server). Is it possible for me to use my domain...

$ host 80.159.xx.xxx
Host 222.79.xxx.xxx.in-addr.arpa not found: 3(NXDOMAIN)

What does this mean? The person currently using the IP address in IRC is chatting right now, but how come if he's...

nvm I got it...I forgot $1 was already being used so I just changed the WORD2's argument to $2

Okay, I tried this:

#!/bin/bash
#ascript.sh

WORD1=$1
WORD2=$2
echo "arg1 -> $arg1"
echo "arg2 -> $arg2"

WORD1=`tail -n +$1 /home/gscn/word1.txt | head -1`
sed -e "s/WORD1/$WORD1/g" <...

This is what I have:


#!/bin/bash
#ascript.sh

WORD1=`tail -n +$1 /home/gscn/word1.txt | head -1`
sed -e "s/WORD1/$WORD1/g" < /home/gscn/configtmp > /home/gscn/config

WORD2=`tail -n +$1...

'w' and 'who' are very similar, they have the same information just switched around a bit

'users' just list the usernames only

I am on FreeBSD so -w is not an option for who, but with 'who -TH' the hostname still gets cut off at the end

"pool-92-199-17-1" is not my full hostname (it has a couple more numbers). I want it to display the full thing

When I do the who command it doesn't show all my info:


$w gscn
6:08PM up 4 days, 20:33, 177 users, load averages: 7.46, 3.78, 3.43
USER TTY FROM LOGIN@ IDLE...

Okay, I decided to make it a bit simpler, and with bash scripting it seems shorter. I have this so far:


#!/bin/bash
killall process1
#editing configs
process1 &
sleep 5
process2


The...

Thanks, I looked up shell redirection and understand it now

$ echo 2 * 3 > 5 is a valid inequality.
This will create a file in the current directory named '5' with the number '2' in it, the names of all the files in the current directory, followed by the...

Okay this will probably have multiple parts to it but I don't really want to trouble you guys with more help because I'm a total noob so I can just do the first part by hand (it's just editing a few...

In my command prompt I did:
sed 's/\://' mytextfile > newtextfile
But it only deleted the first instance of : in each line when some lines have multiple : appearing in each one. How can I delete...