name="John"
echo ${name}
echo ${name/J/j}    #=> "john" (substitution)
echo ${name:0:2}    #=> "Jo" (slicing)
echo ${name::2}     #=> "Jo" (slicing)
echo ${name::-1}    #=> "Joh" (slicing)
echo ${name:(-1)}   #=> "n" (slicing from right)
echo ${name:(-2):1} #=> "h" (slicing from right)
echo ${food:-Cake}  #=> $food or "Cake"

# Update all npm packages under the scope defined by the PREFIX variable ("foo").
PREFIX="foo"; npm ls | grep "$PREFIX" | awk -F/ '{print $NF}' | sed 's/@.*//' | xargs -I package npm update @"$PREFIX"/package

#Leif Messinger
#For when you want to search a lot of words in a file fast

#Arg 1 is the argument the list of words you want to search
#Arg 2 is the file you want to search

#-z means that it looks at the file as a whole, just treating newlines a characters.
#-r is regex. Needed for $, even tho the documentation says you don't need it. They are liars.
#First command replaces all . with \. and all - with \-
#Second command takes all newlines and replaces them with )|(
#Third command takes the trailing |( and deletes it
#Forth command puts a /( at the start
#Fith command puts /!d at the end. This tells it to not delete any lines that match the pattern.

#The second sed takes the output of the first sed as a command that searches any of the combined words
#-f - takes a command from the input
sed -z -r -e 's/\./\\\./g ; s/\-/\\\-/g' -e 's/\n/\)\|\(/g' -e 's/\|\($//' -e 'i/\(' -e 'a/!d' $1 | sed -r -f - $2

#diskRipper.sh by Leif Messinger
#For use on debian, where your cds aren't immediately mounted
wall "CD inserted boss"
set -x	#echo on

cdDrivePath=$(ls -l /dev/cdrom | awk '{print $NF}')
#CD could have no label, so that's why I need awk
cdLabel=$(lsblk -n "/dev/$cdDrivePath" -o label)
if [[ ! -z "$cdLabel" ]]; then	#CD has label
folderName=$cdLabel
echo "The cd label is ${folderName}"
if mkdir ./cds/"${folderName}"; then	#Folder didn't exist before
sudo mount /dev/cdrom ./.cdmountpoint

sudo cp -r ./.cdmountpoint/* "./cds/${folderName}"
sudo chmod -R 777 "./cds/${folderName}"

sudo umount ./.cdmountpoint
eject
wall "CD done and ejecting"
else
wall "Already read that cd, skipped"
fi
else
wall "CD had no label, skipped"
fi

#for ssh abuse attempts
action = %(action_)s
         %(action_abuseipdb)s[abuseipdb_apikey="", abuseipdb_category="18,22"]
         
actionban = curl --fail --ciphers ecdhe_ecdsa_aes_256_sha --data 'key=<abuseipdb_apikey>' --data-urlencode 'comment=<matches>' --data 'ip=<ip>' --data 'category=<abuseipdb_category>' "https://www.abuseipdb.com/report/json"

#
# Austin Leath
# checks for /Desktop symlink. Creates the symlink if it doesnt already exist
#

#Fetch the target user if desired, otherwise use the currently logged in user.
if [ "$4" != "" ]; then
    TARGET_USER=$4
else
    TARGET_USER=$3
fi

if [ "$5" != "" ]; then
    DIRECTORY_NAME=$5
else
    TARGET_USER="$3 Desktop"
fi

# Functions

CHECK_SYMLINK() {
    if test -f "/Desktop"; then
        echo "/Desktop exists"
    else
        echo "/Desktop does not exist"
    fi
}


CHECK_SYNTHETIC_CONF() {
    if test -f "/etc/synthetic.conf"; then
        echo "/etc/synthetic.conf exists"
    else
        echo "/etc/synthetic.conf does not exist"
    fi
}

CREATE_SYMLINK() {
    if [[ $(CHECK_SYNTHETIC_CONF) != "/etc/synthetic.conf exists" ]]; then
        echo "/etc/synthetic.conf does not exist. creating.."
        touch /etc/synthetic.conf
        chown -R root:wheel /etc/synthetic.conf
    fi

    if grep -q "$DIRECTORY_NAME" /etc/synthetic.conf; then
        echo "$DIRECTORY_NAME already exists"
        exit 1
    else
        echo "$DIRECTORY_NAME\t/Users/$TARGET_USER/Desktop" >> /etc/synthetic.conf
    fi
    
    echo "/Desktop symbolic link created"
}

if [[ $(CHECK_SYMLINK) != "/Desktop exists" ]]; then
    CREATE_SYMLINK
fi

exit 0