diff --git a/articles/day.25.build.pipes.key.vault.linux.md b/articles/day.25.build.pipes.key.vault.linux.md
index 947ed9f..97ca71d 100644
--- a/articles/day.25.build.pipes.key.vault.linux.md
+++ b/articles/day.25.build.pipes.key.vault.linux.md
@@ -44,7 +44,7 @@ You should get back the following output.
 Next, run the following command randomly generate 4 alphanumeric characters.
 
 ```bash
-RANDOM_ALPHA=$(cat /dev/urandom | tr -dc 'a-z0-9' | fold -w 4 | head -n 1)
+RANDOM_ALPHA=$(LC_CTYPE=C tr -dc 'a-z0-9' < /dev/urandom | fold -w 4 | head -n 1)
 ```
 
 > **NOTE:** We are appending this to the name of our Key Vault to ensure its name is unique.
diff --git a/articles/day.28.build.pipes.sp.direct.access.to.key.vault.linux.md b/articles/day.28.build.pipes.sp.direct.access.to.key.vault.linux.md
index ac5525d..a0390f6 100644
--- a/articles/day.28.build.pipes.sp.direct.access.to.key.vault.linux.md
+++ b/articles/day.28.build.pipes.sp.direct.access.to.key.vault.linux.md
@@ -43,7 +43,7 @@ You should get back the following output.
 Next, run the following command randomly generate 4 alphanumeric characters.
 
 ```bash
-RANDOM_ALPHA=$(cat /dev/urandom | tr -dc 'a-z0-9' | fold -w 4 | head -n 1)
+RANDOM_ALPHA=$(LC_CTYPE=C tr -dc 'a-z0-9' < /dev/urandom | fold -w 4 | head -n 1)
 ```
 
 > **NOTE:** We are appending this to the name of our Key Vault to ensure its name is unique.
diff --git a/articles/day.30.build.pipes.encrypted.variables.linux.md b/articles/day.30.build.pipes.encrypted.variables.linux.md
index 5d3422f..b5da00e 100644
--- a/articles/day.30.build.pipes.encrypted.variables.linux.md
+++ b/articles/day.30.build.pipes.encrypted.variables.linux.md
@@ -46,7 +46,7 @@ You should get back the following output:
 Next, run the following command randomly generate 4 alphanumeric characters.
 
 ```bash
-RANDOM_ALPHA=$(cat /dev/urandom | tr -dc 'a-z0-9' | fold -w 4 | head -n 1)
+RANDOM_ALPHA=$(LC_CTYPE=C tr -dc 'a-z0-9' < /dev/urandom | fold -w 4 | head -n 1)
 ```
 
 > **NOTE:** We are appending this to the name of our Storage Account to ensure we create a unique Storage Account name.
diff --git a/articles/day.31.build.pipes.sp.managed.sql.linux.md b/articles/day.31.build.pipes.sp.managed.sql.linux.md
index 05f3f6d..97fa16e 100644
--- a/articles/day.31.build.pipes.sp.managed.sql.linux.md
+++ b/articles/day.31.build.pipes.sp.managed.sql.linux.md
@@ -45,7 +45,7 @@ You should get back the following output:
 Next, run the following command randomly generate 4 alphanumeric characters.
 
 ```bash
-RANDOM_ALPHA=$(cat /dev/urandom | tr -dc 'a-z0-9' | fold -w 4 | head -n 1)
+RANDOM_ALPHA=$(LC_CTYPE=C tr -dc 'a-z0-9' < /dev/urandom | fold -w 4 | head -n 1)
 ```
 
 > **NOTE:** We are appending this to the name of our Azure SQL Server and DB to ensure uniqueness.
diff --git a/articles/day.72.deploying.private.k8s.clusters.in.azure.part1.md b/articles/day.72.deploying.private.k8s.clusters.in.azure.part1.md
index edde21d..b05514f 100644
--- a/articles/day.72.deploying.private.k8s.clusters.in.azure.part1.md
+++ b/articles/day.72.deploying.private.k8s.clusters.in.azure.part1.md
@@ -115,7 +115,7 @@ AZURE_SUB_ID="00000000-0000-0000-0000-000000000000"
 Next, run the following command randomly generate 4 alphanumeric characters. This will be appended to the name of the Kubernetes Cluster for uniqueness.
 
 ```bash
-RANDOM_ALPHA=$(cat /dev/urandom | tr -dc 'a-z0-9' | fold -w 4 | head -n 1)
+RANDOM_ALPHA=$(LC_CTYPE=C tr -dc 'a-z0-9' < /dev/urandom | fold -w 4 | head -n 1)
 ```
 
 </br>
diff --git a/articles/day.xx.building.and.deploying.containers.part1.md b/articles/day.xx.building.and.deploying.containers.part1.md
index 7688f41..275827c 100644
--- a/articles/day.xx.building.and.deploying.containers.part1.md
+++ b/articles/day.xx.building.and.deploying.containers.part1.md
@@ -87,7 +87,7 @@ You should get back the following output:
 Next, run the following command randomly generate 4 alphanumeric characters.
 
 ```bash
-RANDOM_ALPHA=$(cat /dev/urandom | tr -dc 'a-z0-9' | fold -w 4 | head -n 1)
+RANDOM_ALPHA=$(LC_CTYPE=C tr -dc 'a-z0-9' < /dev/urandom | fold -w 4 | head -n 1)
 ```
 
 > **NOTE:** We are appending this to the name of our Container Registry to ensure we create a unique name.