# tune2fs -O +dir_index,+large_file -o +journal_data_writeback /dev/sdb2

# ps -o pid,stime,cmd -C nc
  PID STIME CMD
 4782 18:10 /usr/bin/nc -u -l -p 6666

${var/originaltext/replacetext}

for f in *;do mv $f ${f/test/prod};done

rpm -qa --queryformat="%{size} %{name}-%{version}-%{release}\n" | sort -rn | less

#!/bin/bash

# A script for migrating from UW-IMAP to Dovecot
#
# By Andrew Ziem
# Copyright (c) 2007 Springs Rescue Mission.  All rights reserved.
#
#
# Moves UW-IMAP mboxes from two locations to ~/mail so that Dovecot
# can easily convert mboxes to Maildirs.  Mailboxes with whitespace
# should be handled properly, and IMAP subscriptions should be preserved.
#
#


# Edit the below variables

#HOME_USERS=/home
HOME_USERS=/home/users

#MAIL_SPOOL=/var/mail
MAIL_SPOOL=/var/spool/mail



# to this function pass the user name
function move_mailboxlist
{
	if [ ! -d "$HOME_USERS/$1" ];
	then
		echo "Error: $HOME_USERS/$1 does not exist"
		return 0
	fi

	# make ~/mail
	cd "$HOME_USERS/$1"
	mkdir mail
	chown "$1" mail

	# find each mbox and move it to ~/mail
	if [ ! -f ".mailboxlist" ];
	then
		echo "Warning: .mailboxlist does not exist for $1"
		return 0
	fi
	
	# cat .mailboxlist | while read line; do mv "${line}" ./mail/; done
	cat .mailboxlist | tr '\n' '\0' | xargs -0 mv -t ./mail/

	# preserve subscriptions (to prevent manual resubscriptions)
	mkdir Maildir
	chown "$1" Maildir
	cp -a .mailboxlist Maildir/subscriptions
}

# move inbox from $MAIL_SPOOL to ~/mail/inbox
function move_inbox
{
	if [ ! -f "${MAIL_SPOOL}/$1" ];
	then
		echo "Error: ${MAIL_SPOOL}/$1 does not exist"
		return 0
	fi
	cp "${MAIL_SPOOL}/$1" "${HOME_USERS}/$1/mail/inbox"
	chown "$1" "${HOME_USERS}/$1/mail/inbox"
}

if [ $# -eq 0 ];
then
	echo "First, did you edit the directory names in the script?"
	echo "Then, if you want to do a dry run, prefix mv and cp with echo."
	echo "Then, invoke $0 by passing one or more user names."
	exit
fi

for user in $@
do
	echo "*** Processing user $user"
	move_mailboxlist $user
	move_inbox $user
done

[myshare]
  path = /var/test
  veto files = /var/test/private

iptables -I FORWARD -p tcp --tcp-flags SYN,RST SYN \
        -j TCPMSS --clamp-mss-to-pmtu  

#!/bin/bash

filename=$1
date=`date +%Y%m%d`

usage () {
        echo "Usage: `basename $0` filename"
}

if [ -z "$filename" -a ! -f "$filename" ]; then
        usage
        exit 1
fi

rev=0
backup="$filename.$date.$rev"

while [ -f $backup ]; do
        let rev+=1
        backup="$filename.$date.$rev"
done

cp $filename $backup
exit $?

fh = open('foo.txt', 'r')
line = fh.readline()
while line:
    # do something here
    line = fh.readline()

for line in open('foo.txt', 'r'):
    # do something here