lookup.sh

# You can use lookup mode to retrieve your app’s current metadata. 
# Lookup mode will create an App Store package at the set destination. 
# The package name will be the app's SKU with the .itmsp extension. 
# For example, if your app’s SKU is “myapp1” on iTunes Connect, 
# your filename would be myapp1.itmsp. The metadata.xml file within 
# the App Store package contains the app's metadata.

iTMSTransporter -m lookupMetadata 
                -u USERNAME -p PASSWORD 
                -vendor_id APP_SKU -subitemtype [InAppPurchase | GameCenterLeaderboard | GameCenterAchievement] 
                -subitemids COMMA_SEPARATED_PRODUCT_IDS 
                -destination APP_STORE_PACKAGE_PATH 
                -o OUTPUT_FILE

# One liner

iTMSTransporter -m lookupMetadata -u USERNAME -p PASSWORD -vendor_id APP_SKU -subitemtype [InAppPurchase | GameCenterLeaderboard | GameCenterAchievement] -subitemids COMMA_SEPARATED_PRODUCT_IDS -destination APP_STORE_PACKAGE_PATH -o OUTPUT_FILE

upload.sh

# Upload mode submits your App Store package to the App Store. 
# Before submitting, ensure that the package includes all assets.

iTMSTransporter -m upload -f APP_STORE_PACKAGE -u USERNAME -p PASSWORD -o OUTPUT_FILE

verify.sh

# Verify mode validates your App Store package, including metadata 
# and assets, before delivering it to the App Store. In verify mode, 
# no changes will be made to your app's live metadata. 

iTMSTransporter -m verify -f APP_STORE_PACKAGE -u USERNAME -p PASSWORD -o OUTPUT_FILE