diff --git a/mintnet-kubernetes/app.template.yaml b/mintnet-kubernetes/app.template.yaml
index fc3bbb9e..afdace34 100644
--- a/mintnet-kubernetes/app.template.yaml
+++ b/mintnet-kubernetes/app.template.yaml
@@ -124,7 +124,7 @@ spec:
 
           # fill genesis file with validators
           IFS=',' read -ra VALS_ARR <<< "$VALIDATORS"
-          fqdn_suffix=$(echo $(hostname -f) | sed 's#[^.]*\.\(\)#\1#')
+          fqdn_suffix=$(hostname -f | sed 's#[^.]*\.\(\)#\1#')
           for v in "${VALS_ARR[@]}"; do
             # wait until validator generates priv/pub key pair
             set +e
@@ -140,7 +140,7 @@ spec:
 
             # add validator to genesis file along with its pub_key
             curl -s "http://$v.$fqdn_suffix/pub_key.json" | jq ". as \$k | {pub_key: \$k, amount: $VALIDATOR_POWER, name: \"$v\"}" > pub_validator.json
-            cat /tendermint/genesis.json | jq ".validators |= .+ [$(cat pub_validator.json)]" > /tendermint/genesis.json
+            cat /tendermint/genesis.json | jq ".validators |= .+ [$(cat pub_validator.json)]" > tmpgenesis && mv tmpgenesis /tendermint/genesis.json
             rm pub_validator.json
           done
 
diff --git a/mintnet-kubernetes/examples/basecoin/app.yaml b/mintnet-kubernetes/examples/basecoin/app.yaml
index d1874a25..1a1f0ef8 100644
--- a/mintnet-kubernetes/examples/basecoin/app.yaml
+++ b/mintnet-kubernetes/examples/basecoin/app.yaml
@@ -172,7 +172,7 @@ spec:
 
           # fill genesis file with validators
           IFS=',' read -ra VALS_ARR <<< "$VALIDATORS"
-          fqdn_suffix=$(echo $(hostname -f) | sed 's#[^.]*\.\(\)#\1#')
+          fqdn_suffix=$(hostname -f | sed 's#[^.]*\.\(\)#\1#')
           for v in "${VALS_ARR[@]}"; do
             # wait until validator generates priv/pub key pair
             set +e
@@ -188,7 +188,7 @@ spec:
 
             # add validator to genesis file along with its pub_key
             curl -s "http://$v.$fqdn_suffix/pub_key.json" | jq ". as \$k | {pub_key: \$k, amount: $VALIDATOR_POWER, name: \"$v\"}" > pub_validator.json
-            cat /tendermint/genesis.json | jq ".validators |= .+ [$(cat pub_validator.json)]" > /tendermint/genesis.json
+            cat /tendermint/genesis.json | jq ".validators |= .+ [$(cat pub_validator.json)]" > tmpgenesis && mv tmpgenesis /tendermint/genesis.json
             rm pub_validator.json
           done
 
@@ -222,11 +222,11 @@ spec:
 
           # replace "tm-N" with public keys in genesis file
           cp /etc/app/genesis.json genesis.json
-          fqdn_suffix=$(echo $(hostname -f) | sed 's#[^.]*\.\(\)#\1#')
+          fqdn_suffix=$(hostname -f | sed 's#[^.]*\.\(\)#\1#')
           # for every "base/account"
           i=3
           length=$(cat genesis.json | jq ". | length")
-          while [ $i -lt $length ]; do
+          while [[ $i -lt $length ]]; do
             # extract pod name ("tm-0")
             pod=$(cat genesis.json | jq -r ".[$i].pub_key[0]")
 
@@ -246,7 +246,7 @@ spec:
             curl -s "http://$pod.$fqdn_suffix/app_pub_key.json" | jq "." > k.json
 
             # replace pod name with it (["tm-0"] => "[1, XXXXXXXXXXXXXXXXXXXX]")
-            cat genesis.json | jq ".[$i].pub_key = $(cat k.json | jq '.')" > genesis.json
+            cat genesis.json | jq ".[$i].pub_key = $(cat k.json | jq '.')" > tmpgenesis && mv tmpgenesis genesis.json
             rm -f k.json
 
             i=$((i+2)) # skip "base/account" field itself
diff --git a/mintnet-kubernetes/examples/counter/app.yaml b/mintnet-kubernetes/examples/counter/app.yaml
index b4a06af0..f9f9ad19 100644
--- a/mintnet-kubernetes/examples/counter/app.yaml
+++ b/mintnet-kubernetes/examples/counter/app.yaml
@@ -116,7 +116,7 @@ spec:
 
           # fill genesis file with validators
           IFS=',' read -ra VALS_ARR <<< "$VALIDATORS"
-          fqdn_suffix=$(echo $(hostname -f) | sed 's#[^.]*\.\(\)#\1#')
+          fqdn_suffix=$(hostname -f | sed 's#[^.]*\.\(\)#\1#')
           for v in "${VALS_ARR[@]}"; do
             # wait until validator generates priv/pub key pair
             set +e
@@ -132,7 +132,7 @@ spec:
 
             # add validator to genesis file along with its pub_key
             curl -s "http://$v.$fqdn_suffix/pub_key.json" | jq ". as \$k | {pub_key: \$k, amount: $VALIDATOR_POWER, name: \"$v\"}" > pub_validator.json
-            cat /tendermint/genesis.json | jq ".validators |= .+ [$(cat pub_validator.json)]" > /tendermint/genesis.json
+            cat /tendermint/genesis.json | jq ".validators |= .+ [$(cat pub_validator.json)]" > tmpgenesis && mv tmpgenesis /tendermint/genesis.json
             rm pub_validator.json
           done
 
diff --git a/mintnet-kubernetes/examples/dummy/app.yaml b/mintnet-kubernetes/examples/dummy/app.yaml
index 7efc48dc..8d87910e 100644
--- a/mintnet-kubernetes/examples/dummy/app.yaml
+++ b/mintnet-kubernetes/examples/dummy/app.yaml
@@ -116,7 +116,7 @@ spec:
 
           # fill genesis file with validators
           IFS=',' read -ra VALS_ARR <<< "$VALIDATORS"
-          fqdn_suffix=$(echo $(hostname -f) | sed 's#[^.]*\.\(\)#\1#')
+          fqdn_suffix=$(hostname -f | sed 's#[^.]*\.\(\)#\1#')
           for v in "${VALS_ARR[@]}"; do
             # wait until validator generates priv/pub key pair
             set +e
@@ -132,7 +132,7 @@ spec:
 
             # add validator to genesis file along with its pub_key
             curl -s "http://$v.$fqdn_suffix/pub_key.json" | jq ". as \$k | {pub_key: \$k, amount: $VALIDATOR_POWER, name: \"$v\"}" > pub_validator.json
-            cat /tendermint/genesis.json | jq ".validators |= .+ [$(cat pub_validator.json)]" > /tendermint/genesis.json
+            cat /tendermint/genesis.json | jq ".validators |= .+ [$(cat pub_validator.json)]" > tmpgenesis && mv tmpgenesis /tendermint/genesis.json
             rm pub_validator.json
           done
 
diff --git a/mintnet-kubernetes/examples/localchain/app.yaml b/mintnet-kubernetes/examples/localchain/app.yaml
index 8d6a7775..980453e1 100644
--- a/mintnet-kubernetes/examples/localchain/app.yaml
+++ b/mintnet-kubernetes/examples/localchain/app.yaml
@@ -147,7 +147,7 @@ spec:
 
           # fill genesis file with validators
           IFS=',' read -ra VALS_ARR <<< "$VALIDATORS"
-          fqdn_suffix=$(echo $(hostname -f) | sed 's#[^.]*\.\(\)#\1#')
+          fqdn_suffix=$(hostname -f | sed 's#[^.]*\.\(\)#\1#')
           for v in "${VALS_ARR[@]}"; do
             # wait until validator generates priv/pub key pair
             set +e
@@ -163,7 +163,7 @@ spec:
 
             # add validator to genesis file along with its pub_key
             curl -s "http://$v.$fqdn_suffix/pub_key.json" | jq ". as \$k | {pub_key: \$k, amount: $VALIDATOR_POWER, name: \"$v\"}" > pub_validator.json
-            cat /tendermint/genesis.json | jq ".validators |= .+ [$(cat pub_validator.json)]" > /tendermint/genesis.json
+            cat /tendermint/genesis.json | jq ".validators |= .+ [$(cat pub_validator.json)]" > tmpgenesis && mv tmpgenesis /tendermint/genesis.json
             rm pub_validator.json
           done