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‎check_disk_space.sh

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#!/bin/sh
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# check_disk_space.sh
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#
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# Description:
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# Checks for available disk space and sends warning (via email) if below
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# urgent/critical thresholds. For use on outdated servers that weren't properly
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# maintained by previous 'owners' that are running on legacy/end-of-life
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# operating system(s). On a properly maintained system, there are far more
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# elegant ways to monitor disk space. The author(s) recommend you use those
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# other methods instead of this software if/where at all possible.
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#
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# Usage: Install to location of your choice and setup a cronjob as root.
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#
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# Example: 00 12 * * * /root/sbin/check_disk_space.sh
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#
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# Author : Omar Asfour <[email protected]> https://omar.asfour.ca
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# License : CC0 1.0 Universal (CC0 1.0) - Public Domain Dedication
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# License URL: http://creativecommons.org/publicdomain/zero/1.0/
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#
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# To the extent possible under law, the author(s) have dedicated all copyright
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# and related and neighboring rights to this software to the public domain
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# worldwide.
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#
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# This software is distributed without any warranty. You should have received a
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# copy of the CC0 Public Domain Dedication along with this software.
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# If not, see <http://creativecommons.org/publicdomain/zero/1.0/>.
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#
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### CONFIGURATION ###
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urgent=2048 # urgent threshold (in MiB - Mebibytes available))
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critical=1024 # critical threshold
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mailhost=10.0.0.2
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mailport=25
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fromname="Server"
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[email protected]
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toname="recipient"
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[email protected]
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### SUPPORTING FUNCTIONS ###
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# Checks last status line returned by server.
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# By default, expects '250' status; but can be invoked
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# to check for other status codes
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# eg. checkStatus "${sts}" "${line}" 220
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function checkStatus {
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expect=250
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if [ $# -eq 3 ] ; then
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expect="${3}"
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fi
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if [ $1 -ne $expect ] ; then
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echo "Error: ${2}"
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exit
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fi
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}
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# Establishes connection to server and sends message
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# Parameters:
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# $1 = status (string)
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# $2 = space_available (integer)
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# eg. sendWarning 'critical' 1234
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function sendWarning {
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msgdate=$(date +"%a, %d %b %Y %T %z")
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msgstatus=$(echo "$1" | tr '[:lower:]' '[:upper:]')
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subject="Server Disk Space $msgstatus"
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message="Disk space $1: $2 MiB"
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# Open TCP/UDP Socket using file-descriptor '3'
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exec 3<>/dev/tcp/${mailhost}/${mailport}
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# Connect to SMTP Server
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read -u 3 sts line
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checkStatus "${sts}" "${line}" 220
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echo "HELO ${mailhost}" >&3
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read -u 3 sts line
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checkStatus "$sts" "$line"
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echo "MAIL FROM: <${fromaddr}>" >&3
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read -u 3 sts line
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checkStatus "$sts" "$line"
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echo "RCPT TO: <${toaddr}>" >&3
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read -u 3 sts line
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checkStatus "$sts" "$line"
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echo "DATA" >&3
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read -u 3 sts line
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checkStatus "${sts}" "${line}" 354
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# Send Payload (message)
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echo "Date: $msgdate" >&3
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echo "From: $fromname <$fromaddr>" >&3
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echo "To: $toname <$toaddr>" >&3
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echo "Subject: $subject" >&3
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echo "$message" >&3
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echo "." >&3
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# Confirm Success & Quit
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read -u 3 sts line
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checkStatus "$sts" "$line"
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echo "QUIT" >&3
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# Confirm Quit(ted) successfully -- Not really necessary
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read -u 3 sts line
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checkStatus "${sts}" "${line}" 221
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}
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### MAIN (script entry point) ###
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# Get available MiB on / mount-point
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available=`df -m | grep '/$' | awk '{print $3}'`
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# Compare avaialble disk space against thresholds and
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# send warning if below threshold
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if [[ $available -lt $critical ]]; then
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sendWarning 'critical' $available
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elif [[ $available -lt $urgent ]]; then
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sendWarning 'urgent' $available
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fi

‎cleanmacfiles.sh

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#!/bin/bash
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################################################################################
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# Author: Omar Asfour <http://omar.asfour.ca>
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# Release Date: 2013-12-19
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# Version: 0.0.1
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#
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# To the extent possible under law, the author(s) have dedicated all copyright
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# and related and neighboring rights to this software to the public domain
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# worldwide. This software is distributed without any warranty.
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#
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# You should have received a copy of the CC0 Public Domain Dedication along with
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# this software. If not, see <http://creativecommons.org/publicdomain/zero/1.0/>
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################################################################################
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# NAME: cleanmacfiles
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# PURPOSE: Fairly obvious, I'd think. Gets rid of files created by Mac computers
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# that can be a little annoying.
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# CAUTION: In some cases, those bothersome Mac files are 'necessary'.
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# For example; do not use this on your Time Machine backups.
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# You'll regret it.
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# USAGE: cleanmacfiles.sh [path]
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# OPTIONS: path : defaults to current directory
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#
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# Note: Execution is recursive. Using this will purge files in subdirectories
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################################################################################
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#
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# Finds files Macs love to throw all over network shares and external media
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# and destroys them
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function macFilesMustDieIn {
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(for target in {Temporary\ Items,Network\ Trash\ Folder,.{DS_Store,AppleDB,TemporaryItems,AppleDouble,bin,AppleDesktop,Spotlight,Trashes,fseventd,_*}}; do
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find $1 -name "$target" -print0;
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done) | xargs -0 -I {} rm -rvf {}
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}
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# Command Line Parser
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if [ -n "$1" ]; then # Executes on directory given in first argument
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macFilesMustDieIn $1
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else # If no argument given, executes on current working directory
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macFilesMustDieIn .
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fi

‎ipdiffmail.sh

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#!/bin/bash
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################################################################################
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# ipdiffmail.sh - IP Address Change Email Notifier
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#
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# Author: Omar Asfour <http://omar.asfour.ca>
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# Release Date: 2013-12-19
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# Version: 0.0.1
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#
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# To the extent possible under law, the author(s) have dedicated all copyright
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# and related and neighboring rights to this software to the public domain
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# worldwide. This software is distributed without any warranty.
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#
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# You should have received a copy of the CC0 Public Domain Dedication along with
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# this software. If not, see <http://creativecommons.org/publicdomain/zero/1.0/>
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################################################################################
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# Purpose: Check for a change of your external IP address, and send you an
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# email in the event of a change.
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#
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# WARNING! This script will contain your email login info. Lock it down.
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#
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# Dependency: cURL <http://curl.haxx.se/>
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# Dependency: SendEMail <http://caspian.dotconf.net/menu/Software/SendEmail/>
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#
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# Requirement: SMTP/TLS server
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# Requirement: user write permission to path of $IPDIFFCURR (default /root/tmp)
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# Requirement: user execute permission on /bin/hostname
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#
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# Exit 0: IP Address not changed
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# Exit 1: IP Address changed ; SendEmail invoked (ie. check your inbox)
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################################################################################
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# Usage Notes:
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#
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# To have this run every 12 hrs on the 30 min mark, and log only changes
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# (stderr) to syslog, add the following to **crontab** (5), substituting [user]
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# for the file owner, and [path] with the path to this script:
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#
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# 30 */12 * * * [user] ([path]/ipdiff.sh > /dev/null) 2>&1 | logger -i -t IPDIFF
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#
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################################################################################
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DEBUG=0 # Set to 1 for debug mode
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IPDIFFCURR='/root/tmp/ipdiff.curr' # Tracks current/last-known IP
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SENDERNAME=`/bin/hostname` # Sender (ie. From: in email)
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SMTPSERVER='smtp.yourserver.com:587' # SMTP/TLS server:port
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# Modify these to match your Gmail account.
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RECEIVERNAME='Your Name' # Your name
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SMTPUSER='yoursmtpaccount' # Your SMTP/TLS account
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SMTPPASS='y0urp@sswd' # Your SMTP/TLS password
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# Sends notification email and updates record of current IP Address
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function change_execute {
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MSGBODY="$SENDERNAME IP Address changed: $CURRIP $NEWIP"
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`/usr/bin/sendemail -s $SMTPSERVER -f "$SENDERNAME <$SMTPUSER>" -t "$RECEIVERNAME <$SMTPUSER>" -u $MSGBODY -m $MSGBODY -o tls=yes -o username=$SMTPUSER -o password=$SMTPPASS`
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echo $NEWIP > $IPDIFFCURR
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}
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# IP Address has changed. Call change_execute, and write message to 'standard error', exit in 'error' state.
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function change_exit {
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change_execute
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echo "$1" 1>&2
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exit 1
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}
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# IP Address has not changed. Write message to 'standard output' and exit in 'success' state.
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function nochange_exit {
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echo "$1"
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exit 0
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}
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# Checks for IP Address change, relying on opendns.com for answers
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function ipchange_check {
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NEWIP=`nslookup -query=a myip.opendns.com resolver1.opendns.com | awk -F': ' 'NR==6 {print $2}'`
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if [ $DEBUG -gt 0 ]; then echo "\$NEWIP=$NEWIP"; fi
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if [ $DEBUG -gt 0 ]; then echo "\$CURRIP=$CURRIP"; fi
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if [ $NEWIP != $CURRIP ]; then
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change_exit "IP Address changed: $CURRIP $NEWIP"
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else
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nochange_exit "IP Address unchanged: $CURRIP/$NEWIP"
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fi
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}
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# MAIN (Script Entry Point)
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if [ -f $IPDIFFCURR ]; then
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CURRIP=`cat $IPDIFFCURR`
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ipchange_check
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else
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CURRIP='0.0.0.0'
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ipchange_check
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fi

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