getNowAsTimestampString

public String getNowAsTimestampString() {
Calendar nowCalendar = Calendar.getInstance();
java.util.Date myDate = nowCalendar.getTime(); // ex: Thu Aug 09 13:20:36 EDT 2007
SimpleDateFormat sdf = new SimpleDateFormat("yyyy.MM.dd_HH.mm.ss");
return sdf.format(myDate);
}

Setting up a gateway - fresh OpenSUSE set up

ping google.com
connect: Network is unreachable

Grrr...


cat /etc/resolv.conf
echo "alias net-pf-10 off" >> /etc/modprobe.conf
echo "alias ipv6 off" >> /etc/modprobe.conf
ip route show all
route add default gw
ip route show all
ping google.com

Fixed!

How to back up web accessible files using wget, and to remove files older than 30 days

1. Script to back up files over wget:

#!/bin/bash
#
# This script grabs all the my-server.alanlupsha.com/logs/ files and
# backs them up on the local server in /home/
#
# @author Alan Lupsha 12/19/2011
#

# keep track of the start time
STARTTIME="Started backup at: `date`"


#########################################################################
# You should change these entries
#
# make sure to create the directory first
# ex: "mkdir /home/lupsha/backups"
BACKUPDIR=/home/lupsha/backups

# save text to a temporary file
EMAILFILE=/tmp/email.txt

# update this
EMAILADDRESS=my-email-address@my-domain.com
#########################################################################

# clean up email file
rm "$EMAILFILE"

# save file in this directory
cd "$BACKUPDIR"

LOC="`pwd`"
if [ "$LOC" != "$BACKUPDIR" ]; then
echo "ERROR, I should be in $BACKUPDIR, but I'm not! Exiting...";
exit 1
fi

# download files
wget -e robots=off --recursive --no-directories \
--no-host-directories --level=1 --no-clobber \
http://my-server.alanlupsha.com/logs/


# save timestamp
echo "$STARTTIME" >> $EMAILFILE
echo "\r\n" >> $EMAILFILE
echo "Ending pass logs backup at `date`" >> $EMAILFILE

# send an email with the result
cat $EMAILFILE | mail -s "Ran pass logs backup" $EMAILADDRESS

2. Save the script and run it from a cron job, only week days, at 7:30 AM

sudo crontab -e

# run script every week day at 7:30AM
30 07 * * 1-5 /home/lupsha/backup-logs-script.sh

3. On the server where the files are stored, remove the files that are older than 30 days:

cd /var/www/html/myfiles
find . -type f -mtime +30 -exec rm -- {} \;

How to convert video to a lossless format using ffmpeg!

How to convert a .3gp video to .flv:
ffmpeg -i a.3gp -ar 22050 -ab 32k -f flv a.flv


How to convert to almost lossless format:
ffmpeg -i a.3gp -an -f yuv4mpegpipe b.avi

(Careful, an 11MB 3gp file becomes a 1.6GB avi file!)