Question

I’ve my .sh script as

#!/bin/bash

if [ -z "$1" ] || [ -z "$2" ]; then
    echo "Usage: sync.sh DIRECTORY_LOCATION"
    exit 1
fi

DIRECTORY_LOCATION=$1

DEV_INSTANCE_IP=<some ip>

# Update data
scp -pR ${DEV_INSTANCE_IP}:${DIRECTORY_LOCATION}/* ${DIRECTORY_LOCATION}/

How do I run this script??

I tried sh sync.sh <path to directory> but it echos the line Usage: sync.sh DIRECTORY_LOCATION. Does that mean it’s being run??

Answer 1

yes it’s running, -z flag means

-z STRING      True if string is empty.

If either first argument or second is empty –> exit.

one way of getting more information is to change the shebang to #!/bin/bash -x this will tell bash to print every line that is executed including the value of the parameters.