Thread: [Tutorial] Cron + Various seedbox scripts.

Hello,
This is my first tutorial here, just thought I would share some of my handy seedbox scripts.. I am a Software Engineer, and I do Linux scripting as a hobby, and as a part of my day job (I automate a lot of our build / test / install procedures). If you have any script requests / modifications, let me know and I may be of help. Also, please let me know if I made any typo's, I had to make some modifications on the fly to make them more generic.

First and most important, Cron (scheduler) is awesome. SSH into your server under the user you want cron to run, and execute the following command, then paste the code. IMPORTANT: Some cron have a bug, you must insert a blank line after your command.

• crontab -e

Code:

*/2 * * * * find /home/seed/script/ -name "*.sh" -print0 | xargs -0 -P 0 -n 1 bash

Now, any scripts (ending in .sh) you place in your special folder, will automatically run every 2 minutes!

So here are some quick n dirty sample scripts I have used on my seedbox running Ubuntu and on my Windows 7 client computer.

• clean_name.sh: remove common windows garbage chars / spaces, then moves the torrents to your rtorrent watch directory

Code:

#!/bin/bash
cd /home/seed/tor/
rename 's/\ /_/g' ./*
rename 's/[\(\)\-=\+]//g' ./*
rename 's/\[//g' ./*
rename 's/\]//g' ./*
chmod 777 ./*
mv ./* /home/seed/watch/

• log_ram.sh: Log the current free ram + datestamp to a file, helpful for VPS seedboxes to monitor your ram usage for a day while downloading.

Code:

#!/bin/bash
LOGFILE=/home/seed/mem.txt
DD=`date +%D-%H:%M:%S`
FREE=`free | grep Mem | awk '{print $4}'`
echo $FREE $DD >> $LOGFILE

• check_reboot.sh: Quick way to reboot server, restart rTorrent, or clear rTorrent cache, all you need to do is scp an empty file to your home directory.

Code:

#!/bin/bash
REBOOT_FILE=/home/seed/reboot.txt
RESTART_FILE=/home/seed/restart.txt
CLEAR_FILE=/home/seed/clear.txt
SESSION_FOLDER=/home/seed/.sesson/

if [ -e $REBOOT_FILE ]; then
    rm $REBOOT_FILE
    shutdown -r now
fi

if [ -e $RESTART_FILE ]; then
    rm $RESTART_FILE
    kill -15 `pgrep rtorrent`
fi

if [ -e $CLEAR_FILE ]; then
    rm $CLEAR_FILE
    kill -15 `pgrep rtorrent`
    rm $SESSION_FOLDER/*
fi

• start_rtorrent.sh: Start your rTorrent process, while allowing you to bring it to the foreground later.
• apt-get install dtach (to install it)
• dtach -a /tmp/rtorrent.dtach (to connect at a later time)

Code:

#!/bin/bash
LOGFILE=/home/seed/rtorrent.log
running=$(pgrep rtorrent | tr -d ' ')
if [ -z "$running" ]; then
    echo "Restarting rTorrent" | tee -a $LOGFILE
    date >> $LOGFILE
    TERM=xterm dtach -n /tmp/rtorrent.dtach /usr/local/bin/rtorrent 2>&1 >> $LOGFILE
fi

• check_complete.sh: A simple folder watcher script, which emails you when folder contents change. Does NOT require .rtorrent.rc changes (eg: trigger script on torrent complete)
• requires the free mailsend utility

Code:

#!/bin/bash
# Detect file/folder changes to a specific folder
# Email alerts containing list of additions using Gmail SMTP, create a new gmail account that is solely used to SEND messages.
# Also includes in the email, the ammount of free disk space remaining.

FROM="yournewgmailaccount@gmail.com"
TO="yourpersonalemail@youremail.com"
USER="yournewgmailaccount"
KEY="yournewgmailaccount_password"
SUBJECT="Download Completed!"
CHANGES="change_detected.txt"
WATCH_FOLDER="/home/seed/complete"
SERVER="smtp.gmail.com"
PORT=465
OLD=".complete_old"
NEW=".complete_new"
LOG="/home/seed/mailsend.log"

if [ -e $NEW ]; then
    mv $NEW $OLD
fi
ls $WATCH_FOLDER > $NEW
if [ -e $OLD -a -e $NEW ]; then
    diff $OLD $NEW | grep ">" | sed -e "s/>/COMPLETE:/" > $CHANGES
fi
if [ -s $CHANGES ]; then
    echo `df -h | grep simfs | awk '{print $4 " of " $2 " free space remaining"}'` >> $CHANGES
    cat $CHANGES >> $LOG
    /usr/local/bin/mailsend -to $TO -from $FROM -ssl -smtp $SERVER -port $PORT -sub "$SUBJECT" +cc +bc -v -auth-login -user $USER -pass $KEY -attach "$CHANGES,text/plain,i" >> $LOG 2>&1
fi
rm $CHANGES 2> /dev/null

Windows Scripts assume that the .bat files resides in a folder with WinScp.com and WinScp.exe. Create a saved session named "seedbox_session" with saved password.

• upload_torrents.bat: Automatically upload torrents to seedbox with a single click.

Code:

winscp.com /console /command "open seedbox_session "option batch on" "option confirm off" "cd /home/seed/tor" "put *.torrent" exit
if errorlevel 1 goto ERROR
echo Success!
rem uncomment either of these lines if you wish
rem move *.torrent c:\torrent_archive
rem del /Q *.torrent
goto END

:ERROR
echo Error!

:END
pause

• upload_script.bat: Quickly upload a script (ensure line ending is unix! use a quality text editor like notepad++)

Code:

winscp.com /console /command "open seedbox_session "option batch on"  "option confirm off" "cd /home/seed/scripts" "put *.sh" exit
if errorlevel 1 goto ERROR
echo Success!
goto END

:ERROR
echo Error!

:END
pause

• get_complete.bat: Download all your complete files from your seedbox, while first giving you a list of files/folders with disk usage. lcd = local folder, cd = remote. Note, this also deletes the file off the server, if you don't like that behavior, remove -delete from "get" command.

Code:

winscp.com /console /command "open seedbox_session" "option batch off"  "option confirm off" "lcd C:\Downloads" "cd /home/seed/complete" "call echo Files To  Download:" "call du -ch" "get -delete *" exit
if errorlevel 1 goto ERROR
echo Success
goto END

:ERROR
echo Error!

:END
pause

Hope that helps some of you automate your life!