diff --git a/script/migration/v4-rename-tlmcmd.sh b/script/migration/v4-rename-tlmcmd.sh
new file mode 100755
index 000000000..c9355eeb3
--- /dev/null
+++ b/script/migration/v4-rename-tlmcmd.sh
@@ -0,0 +1,45 @@
+#!/bin/bash
+# Script -> script
+
+## c2a-core ref
+find . -name "*" -not -path "*/.git/*" -type f -print0 | xargs -0 sed -i -e "s#src_core/TlmCmd/Ccsds#src_core/tlm_cmd/ccsds#g"
+find . -name "*" -not -path "*/.git/*" -type f -print0 | xargs -0 sed -i -e "s#src_core\\\TlmCmd\\\Ccsds#src_core\\\tlm_cmd\\\ccsds#g"
+
+find . -name "*" -not -path "*/.git/*" -type f -print0 | xargs -0 sed -i -e "s#src_core/TlmCmd#src_core/tlm_cmd#g"
+find . -name "*" -not -path "*/.git/*" -type f -print0 | xargs -0 sed -i -e "s#src_core\\\TlmCmd#src_core\\\tlm_cmd#g"
+
+find . -name "*" -not -path "*/.git/*" -type f -print0 | xargs -0 sed -i -e "s#\${C2A_CORE_DIR}/TlmCmd#\${C2A_CORE_DIR}/applications#g"
+
+# C2A user code
+mv src/src_user/TlmCmd src/src_user/tlm_cmd
+
+mv src/src_user/tlm_cmd/Ccsds src/src_user/tlm_cmd/ccsds
+mv src/src_user/tlm_cmd/NormalBlockCommandDefinition src/src_user/tlm_cmd/normal_block_command_definition
+
+find . -name "*" -not -path "*/.git/*" -type f -print0 | xargs -0 sed -i -e "s#TlmCmd/Ccsds#tlm_cmd/ccsds#g"
+find . -name "*" -not -path "*/.git/*" -type f -print0 | xargs -0 sed -i -e "s#TlmCmd\\\Ccsds#tlm_cmd\\\ccsds#g"
+
+find . -name "*" -not -path "*/.git/*" -type f -print0 | xargs -0 sed -i -e "s#/TlmCmd#/tlm_cmd#g"
+find . -name "*" -not -path "*/.git/*" -type f -print0 | xargs -0 sed -i -e "s#\\\TlmCmd#\\\tlm_cmd#g"
+
+find . -name "*" -not -path "*/.git/*" -type f -print0 | xargs -0 sed -i -e "s#TlmCmd/#tlm_cmd/#g"
+find . -name "*" -not -path "*/.git/*" -type f -print0 | xargs -0 sed -i -e "s#TlmCmd\\\#tlm_cmd\\\#g"
+
+# CMake
+find . -name "*" -not -path "*/.git/*" -type f -print0 | xargs -0 sed -i -e "s#Ccsds/#ccsds/#g"
+find . -name "*" -not -path "*/.git/*" -type f -print0 | xargs -0 sed -i -e "s#NormalBlockCommandDefinition/#normal_block_command_definition/#g"
+
+# Settings
+mv src/src_user/Settings/TlmCmd src/src_user/Settings/tlm_cmd
+
+mv src/src_user/Settings/tlm_cmd/Ccsds src/src_user/Settings/tlm_cmd/ccsds
+mv src/src_user/Settings/tlm_cmd/NormalBlockCommandDefinition src/src_user/Settings/tlm_cmd/normal_block_command_definition
+mv src/src_user/Settings/tlm_cmd/DataBase src/src_user/Settings/tlm_cmd/data_base
+
+# Test
+mv src/src_user/Test/test/src_core/TlmCmd src/src_user/Test/test/src_core/tlm_cmd
+
+mv src/src_user/Test/test/src_user/TlmCmd src/src_user/Test/test/src_user/tlm_cmd
+
+# Script
+find src/src_user/script -name "*" -not -path "*/.git/*" -type f -print0 | xargs -0 sed -i -e "s#TlmCmd#tlm_cmd#g"