# Three ways of checking if a file exists in a shell script

FILE=/etc/resolv.conf

if test -f "$FILE"; then
    echo "$FILE exists."
fi

if [ -f "$FILE" ]; then
    echo "$FILE exists."
fi

if [[ -f "$FILE" ]]; then
    echo "$FILE exists."
fi

#!/bin/bash

#Leif Messinger lsm0147

#credit.sh FILES
cred="Leif Messinger lsm0147"
for bruh; do
	if [[ $bruh =~ \.cpp|\.c|\.java|\.js ]]; then
		comment="//$cred"
	else

		#Basically everything else gets a pound sign comment

		#Pound signs are standard across linux. bash, sed, gawk, python etc

		#Speaking of which, I need to escape it because of that.
		comment="\#$cred"
	fi
	if [ -s $bruh ]; then

		#If the file has a shebang
		if egrep -q '^#!/' $bruh; then
			sed -i "/^\#!\//a$comment" $bruh
		else
			sed -i "1i$comment" $bruh
		fi
	else
		echo "$comment" > $bruh
	fi
done

for region in `aws ec2 describe-regions --output text | cut -f4`
do
     echo -e "\nListing Instances in region:'$region'..."
     aws ec2 describe-instances --query 'Reservations[*].Instances[*].{Instance:InstanceId,Subnet:SubnetId}' --region $region
done
#This script is to be used with any AWS CLI configured environment, it will list any EC2 instances and their associated subnet network ID's in JSON format

#!/bin/bash
#  RCLONE BACKUP SCRIPT (using ionice)
#  Type crontab -e and copy the line below without the #
#  0 0 * * * ionice -c 3 /home/owner/backup.sh >/dev/null 2>&1 
nowdate=$(date -u)

# OPTIONS
WEBHOOK="YOUR_DISCORD_WEBHOOK_LINK_HERE"
LOGFILE="/root/backup.log"
FROM="/path/where/you/backup/from"
TO="backblaze:BucketName/FolderName"
SERVERNAME="Server Name"

echo "$SERVERNAME started a backup - $nowdate" | tee -a $LOGFILE
curl --data "content=$SERVERNAME started a backup - $nowdate" $WEBHOOK | tee -a $LOGFILE && echo "" >> $LOGFILE

if pidof -o %PPID -x "backup.sh"
then
        echo "Failed backup attempt on $SERVERNAME - $nowdate (rclone already running)" | tee -a $LOGFILE
        curl --data "content=Failed backup attempt on $SERVERNAME - $nowdate (rclone already running)" $WEBHOOK | tee -a $LOGFILE
        exit 1
fi

rclone sync $FROM $TO -P --b2-hard-delete --stats 5s --progress | sed 's/Transferred:/\n\nTransferred:/' | tee -a $LOGFILE

enddate=$(date -u)
endtime=$(date +'%T')
echo "Completed backup on $SERVERNAME - $enddate" | tee -a $LOGFILE
curl -F "content=Completed backup on $SERVERNAME - $enddate" -F upload=@"$LOGFILE" $WEBHOOK | tee -a $LOGFILE

if [ -f $LOGFILE ]
then
        rm $LOGFILE
fi

// check version
node -v || node --version

// list installed versions of node (via nvm)
nvm ls

// install specific version of node
nvm install 6.9.2

// set default version of node
nvm alias default 6.9.2

// switch version of node
nvm use 6.9.1

#!/bin/bash

#Takes all the c and h files in the current directory and prints them

#Yup, it's that easy
for file in *.h *.hpp *.c *.cpp; do

	#If it exists
	if [ -f "$file" ]; then
	echo "//===============$file==============="
	cat $file
	fi
done