Delint existing shell scripts

multinode-demo/client.sh

@@ -1,5 +1,16 @@
-#!/bin/bash
+#!/bin/bash -e
+
+if [[ -z "$1" ]]; then
+  echo "usage: $0 [leader machine]"
+  exit 1
+fi
+
+LEADER="$1"
+
+set -x
 export RUST_LOG=solana=info
-rsync -v -e ssh $1:~/solana/leader.json .
-rsync -v -e ssh $1:~/solana/mint-demo.json .
-cat mint-demo.json | cargo run --release --bin solana-client-demo -- -l leader.json -c 8100 -n 1
+rsync -v -e ssh "$LEADER:~/solana/leader.json" .
+rsync -v -e ssh "$LEADER:~/solana/mint-demo.json" .
+
+cargo run --release --bin solana-client-demo -- \
+  -l leader.json -c 8100 -n 1 < mint-demo.json