diff --git a/fixtures/generate_files.sh b/fixtures/generate_files.sh
index b021776..9296b8f 100755
--- a/fixtures/generate_files.sh
+++ b/fixtures/generate_files.sh
@@ -15,7 +15,7 @@ OUTPUT_FOLDER=$3
 mkdir -p "$OUTPUT_FOLDER"
 
 # Generate a random 4-character string
-RANDOM_STRING=$(LC_ALL=C tr -dc 'a-zA-Z0-9' < /dev/urandom | head -c 4)
+RANDOM_STRING=$(head /dev/urandom | tr -dc A-Za-z0-9 | head -c 4)
 
 # Generate the files
 for (( i=1; i<=$NUMBER_OF_FILES; i++ ))
diff --git a/netsim/sims/iroh/iroh_many_files.json b/netsim/sims/iroh/iroh_many_files.json
index 44aa4d9..f0b6424 100644
--- a/netsim/sims/iroh/iroh_many_files.json
+++ b/netsim/sims/iroh/iroh_many_files.json
@@ -19,7 +19,7 @@
                 {
                     "name": "iroh_get",
                     "count": 1,
-                    "cmd": "time ./bins/iroh blobs get --start %s --out STDOUT > /dev/null",
+                    "cmd": "time ./bins/iroh blobs get --start %s --out /dev/null",
                     "type": "public",
                     "connect": {
                         "strategy": "params",
@@ -48,7 +48,7 @@
                 {
                     "name": "iroh_get",
                     "count": 3,
-                    "cmd": "time ./bins/iroh blobs get --start %s --out STDOUT > /dev/null",
+                    "cmd": "time ./bins/iroh blobs get --start %s --out /dev/null",
                     "type": "public",
                     "connect": {
                         "strategy": "params",
@@ -77,7 +77,7 @@
                 {
                     "name": "iroh_get",
                     "count": 1,
-                    "cmd": "time ./bins/iroh blobs get --start %s --out STDOUT > /dev/null",
+                    "cmd": "time ./bins/iroh blobs get --start %s --out /dev/null",
                     "type": "public",
                     "connect": {
                         "strategy": "params",
@@ -106,7 +106,7 @@
                 {
                     "name": "iroh_get",
                     "count": 3,
-                    "cmd": "time ./bins/iroh blobs get --start %s --out STDOUT > /dev/null",
+                    "cmd": "time ./bins/iroh blobs get --start %s --out /dev/null",
                     "type": "public",
                     "connect": {
                         "strategy": "params",
@@ -135,7 +135,7 @@
                 {
                     "name": "iroh_get",
                     "count": 1,
-                    "cmd": "time ./bins/iroh blobs get --start %s --out STDOUT > /dev/null",
+                    "cmd": "time ./bins/iroh blobs get --start %s --out /dev/null",
                     "type": "public",
                     "connect": {
                         "strategy": "params",
@@ -164,7 +164,7 @@
                 {
                     "name": "iroh_get",
                     "count": 3,
-                    "cmd": "time ./bins/iroh blobs get --start %s --out STDOUT > /dev/null",
+                    "cmd": "time ./bins/iroh blobs get --start %s --out /dev/null",
                     "type": "public",
                     "connect": {
                         "strategy": "params",
@@ -193,7 +193,7 @@
                 {
                     "name": "iroh_get",
                     "count": 1,
-                    "cmd": "time ./bins/iroh blobs get --start %s --out STDOUT > /dev/null",
+                    "cmd": "time ./bins/iroh blobs get --start %s --out /dev/null",
                     "type": "public",
                     "connect": {
                         "strategy": "params",
@@ -222,7 +222,7 @@
                 {
                     "name": "iroh_get",
                     "count": 3,
-                    "cmd": "time ./bins/iroh blobs get --start %s --out STDOUT > /dev/null",
+                    "cmd": "time ./bins/iroh blobs get --start %s --out /dev/null",
                     "type": "public",
                     "connect": {
                         "strategy": "params",