Run cd commands in subshells so they don't change the script process working directory

upgrade.sh

@@ -10,7 +10,7 @@ cli="komodo-cli"
 daemon="komodod -notary -pubkey=${pubkey}"
 
 echo "Building latest komodod..."
-cd ~/komodo/ && git checkout dev && git pull && make clean && ./zcutil/build.sh -j$(nproc)
+(cd ~/komodo/ && git checkout dev && git pull && make clean && ./zcutil/build.sh -j$(nproc))
 
 echo "Symlinking latest komodod binary..."
 sudo ln -sf /home/${USER}/komodo/src/komodo-cli /usr/local/bin/komodo-cli
@@ -27,14 +27,14 @@ echo "Starting komodod and assetchains with new binary..."
 ${daemon} > /dev/null 2>&1 &
 sleep 20
 ./startassetchains.sh > /dev/null 2>&1
-cd ~/VerusCoin/src/verusd -pubkey=$pubkey > /dev/null 2>&1 &
+(cd ~/VerusCoin/src/verusd -pubkey=$pubkey > /dev/null 2>&1 &)
 sleep 20
 
 echo "Importing privkey..."
 ./ac-cli.sh importprivkey $privkey
 
 echo "Updating iguana..."
-cd ~/SuperNET/iguana && git checkout dev && git pull && ./m_notary > ~/logs/iguana 2>&1
+(cd ~/SuperNET/iguana && git checkout dev && git pull && ./m_notary > ~/logs/iguana 2>&1)
 
 echo "Init dPoW..."
-cd ~/komodo/src && ./dpowassets
+(cd ~/komodo/src && ./dpowassets)