diff --git a/deep_speech_2/examples/aishell/run_data.sh b/deep_speech_2/examples/aishell/run_data.sh
index db27c53003da77b8418224aa5bb881d59623c8ed..8bacf6d8066dd5a33637b572ffd4842daf7dc28e 100644
--- a/deep_speech_2/examples/aishell/run_data.sh
+++ b/deep_speech_2/examples/aishell/run_data.sh
@@ -1,6 +1,6 @@
 #! /usr/bin/env bash
 
-pushd ../.. > /dev/null
+cd ../.. > /dev/null
 
 # download data, generate manifests
 PYTHONPATH=.:$PYTHONPATH python data/aishell/aishell.py \
diff --git a/deep_speech_2/examples/aishell/run_infer.sh b/deep_speech_2/examples/aishell/run_infer.sh
index 332bdbe1b678166448707e82ed56ab82124497f5..404555e8b10ef7befff3b67a94b1cadad858e592 100644
--- a/deep_speech_2/examples/aishell/run_infer.sh
+++ b/deep_speech_2/examples/aishell/run_infer.sh
@@ -1,14 +1,14 @@
 #! /usr/bin/env bash
 
-pushd ../.. > /dev/null
+cd ../.. > /dev/null
 
 # download language model
-pushd models/lm > /dev/null
+cd models/lm > /dev/null
 sh download_lm_ch.sh
 if [ $? -ne 0 ]; then
     exit 1
 fi
-popd > /dev/null
+cd - > /dev/null
 
 
 # infer
diff --git a/deep_speech_2/examples/aishell/run_infer_golden.sh b/deep_speech_2/examples/aishell/run_infer_golden.sh
index ac79a4dde5d6905e31e424e031f4c28a1c6cffb9..4701bdaaceae5a345610451ad6b0197dec530617 100644
--- a/deep_speech_2/examples/aishell/run_infer_golden.sh
+++ b/deep_speech_2/examples/aishell/run_infer_golden.sh
@@ -1,23 +1,23 @@
 #! /usr/bin/env bash
 
-pushd ../.. > /dev/null
+cd ../.. > /dev/null
 
 # download language model
-pushd models/lm > /dev/null
+cd models/lm > /dev/null
 sh download_lm_ch.sh
 if [ $? -ne 0 ]; then
     exit 1
 fi
-popd > /dev/null
+cd - > /dev/null
 
 
 # download well-trained model
-pushd models/aishell > /dev/null
+cd models/aishell > /dev/null
 sh download_model.sh
 if [ $? -ne 0 ]; then
     exit 1
 fi
-popd > /dev/null
+cd - > /dev/null
 
 
 # infer
diff --git a/deep_speech_2/examples/aishell/run_test.sh b/deep_speech_2/examples/aishell/run_test.sh
index bfbbcad54ef74cb64217788760a0edd891db58f2..266c736766b5a74f9e502ceec92b03b230477934 100644
--- a/deep_speech_2/examples/aishell/run_test.sh
+++ b/deep_speech_2/examples/aishell/run_test.sh
@@ -1,14 +1,14 @@
 #! /usr/bin/env bash
 
-pushd ../.. > /dev/null
+cd ../.. > /dev/null
 
 # download language model
-pushd models/lm > /dev/null
+cd models/lm > /dev/null
 sh download_lm_ch.sh
 if [ $? -ne 0 ]; then
     exit 1
 fi
-popd > /dev/null
+cd - > /dev/null
 
 
 # evaluate model
diff --git a/deep_speech_2/examples/aishell/run_test_golden.sh b/deep_speech_2/examples/aishell/run_test_golden.sh
index e40e8040cdc92861a7dd29fbc2248f011620c572..50e7fe2c62612f275670d0f83f1a507b43afe771 100644
--- a/deep_speech_2/examples/aishell/run_test_golden.sh
+++ b/deep_speech_2/examples/aishell/run_test_golden.sh
@@ -1,23 +1,23 @@
 #! /usr/bin/env bash
 
-pushd ../.. > /dev/null
+cd ../.. > /dev/null
 
 # download language model
-pushd models/lm > /dev/null
+cd models/lm > /dev/null
 sh download_lm_ch.sh
 if [ $? -ne 0 ]; then
     exit 1
 fi
-popd > /dev/null
+cd - > /dev/null
 
 
 # download well-trained model
-pushd models/aishell > /dev/null
+cd models/aishell > /dev/null
 sh download_model.sh
 if [ $? -ne 0 ]; then
     exit 1
 fi
-popd > /dev/null
+cd - > /dev/null
 
 
 # evaluate model
diff --git a/deep_speech_2/examples/aishell/run_train.sh b/deep_speech_2/examples/aishell/run_train.sh
index 76d75fa29267a1dcad5b859422c5309a16f4307a..8e61ec3c2ad80291f7d45391f6c01c8c62a126c8 100644
--- a/deep_speech_2/examples/aishell/run_train.sh
+++ b/deep_speech_2/examples/aishell/run_train.sh
@@ -1,6 +1,6 @@
 #! /usr/bin/env bash
 
-pushd ../.. > /dev/null
+cd ../.. > /dev/null
 
 # train model
 # if you wish to resume from an exists model, uncomment --init_model_path
diff --git a/deep_speech_2/examples/librispeech/run_data.sh b/deep_speech_2/examples/librispeech/run_data.sh
index 957416f436b9d99de0e3c719f2348c5433d58ae0..b1ad68ab3628559cc3e004d316b2d2ec08a59eb1 100644
--- a/deep_speech_2/examples/librispeech/run_data.sh
+++ b/deep_speech_2/examples/librispeech/run_data.sh
@@ -1,6 +1,6 @@
 #! /usr/bin/env bash
 
-pushd ../.. > /dev/null
+cd ../.. > /dev/null
 
 # download data, generate manifests
 PYTHONPATH=.:$PYPYTHONPATH python data/librispeech/librispeech.py \
diff --git a/deep_speech_2/examples/librispeech/run_infer.sh b/deep_speech_2/examples/librispeech/run_infer.sh
index 85587ed476965da57af9c9b70ff8ba701287181c..2df5b6cc410bbb7a3722a568378aec8be2688c64 100644
--- a/deep_speech_2/examples/librispeech/run_infer.sh
+++ b/deep_speech_2/examples/librispeech/run_infer.sh
@@ -1,14 +1,14 @@
 #! /usr/bin/env bash
 
-pushd ../.. > /dev/null
+cd ../.. > /dev/null
 
 # download language model
-pushd models/lm > /dev/null
+cd models/lm > /dev/null
 sh download_lm_en.sh
 if [ $? -ne 0 ]; then
     exit 1
 fi
-popd > /dev/null
+cd - > /dev/null
 
 
 # infer
diff --git a/deep_speech_2/examples/librispeech/run_infer_golden.sh b/deep_speech_2/examples/librispeech/run_infer_golden.sh
index 8feca555ed8600a291f93a4d8c3c21e01d24e0e6..c407cabe44ef906884f8447692dff8458ebe8ffc 100644
--- a/deep_speech_2/examples/librispeech/run_infer_golden.sh
+++ b/deep_speech_2/examples/librispeech/run_infer_golden.sh
@@ -1,23 +1,23 @@
 #! /usr/bin/env bash
 
-pushd ../.. > /dev/null
+cd ../.. > /dev/null
 
 # download language model
-pushd models/lm > /dev/null
+cd models/lm > /dev/null
 sh download_lm_en.sh
 if [ $? -ne 0 ]; then
     exit 1
 fi
-popd > /dev/null
+cd - > /dev/null
 
 
 # download well-trained model
-pushd models/librispeech > /dev/null
+cd models/librispeech > /dev/null
 sh download_model.sh
 if [ $? -ne 0 ]; then
     exit 1
 fi
-popd > /dev/null
+cd - > /dev/null
 
 
 # infer
diff --git a/deep_speech_2/examples/librispeech/run_test.sh b/deep_speech_2/examples/librispeech/run_test.sh
index d75848b00b640507b1a7b8be0b4b2d16946fbde3..d79a225639919d7dc68635af19b8f19c2527aab7 100644
--- a/deep_speech_2/examples/librispeech/run_test.sh
+++ b/deep_speech_2/examples/librispeech/run_test.sh
@@ -1,14 +1,14 @@
 #! /usr/bin/env bash
 
-pushd ../.. > /dev/null
+cd ../.. > /dev/null
 
 # download language model
-pushd models/lm > /dev/null
+cd models/lm > /dev/null
 sh download_lm_en.sh
 if [ $? -ne 0 ]; then
     exit 1
 fi
-popd > /dev/null
+cd - > /dev/null
 
 
 # evaluate model
diff --git a/deep_speech_2/examples/librispeech/run_test_golden.sh b/deep_speech_2/examples/librispeech/run_test_golden.sh
index 352a9415653352554b18a075fb6d75c00b85eca2..011cdd2ab32ba40bda45dac0946733331f3d67f0 100644
--- a/deep_speech_2/examples/librispeech/run_test_golden.sh
+++ b/deep_speech_2/examples/librispeech/run_test_golden.sh
@@ -1,23 +1,23 @@
 #! /usr/bin/env bash
 
-pushd ../.. > /dev/null
+cd ../.. > /dev/null
 
 # download language model
-pushd models/lm > /dev/null
+cd models/lm > /dev/null
 sh download_lm_en.sh
 if [ $? -ne 0 ]; then
     exit 1
 fi
-popd > /dev/null
+cd - > /dev/null
 
 
 # download well-trained model
-pushd models/librispeech > /dev/null
+cd models/librispeech > /dev/null
 sh download_model.sh
 if [ $? -ne 0 ]; then
     exit 1
 fi
-popd > /dev/null
+cd - > /dev/null
 
 
 # evaluate model
diff --git a/deep_speech_2/examples/librispeech/run_train.sh b/deep_speech_2/examples/librispeech/run_train.sh
index 1d18f29ef829dee1ec3195fcd79098ddff011b73..69251fe0c53c33bf8f48d2516328e74cd00e3852 100644
--- a/deep_speech_2/examples/librispeech/run_train.sh
+++ b/deep_speech_2/examples/librispeech/run_train.sh
@@ -1,6 +1,6 @@
 #! /usr/bin/env bash
 
-pushd ../.. > /dev/null
+cd ../.. > /dev/null
 
 # train model
 # if you wish to resume from an exists model, uncomment --init_model_path
diff --git a/deep_speech_2/examples/librispeech/run_tune.sh b/deep_speech_2/examples/librispeech/run_tune.sh
index 1f76ad700b1508c24364d0375ad8f547f750e460..78b2972d0ee23c96b159ed6b37259d57c08f748c 100644
--- a/deep_speech_2/examples/librispeech/run_tune.sh
+++ b/deep_speech_2/examples/librispeech/run_tune.sh
@@ -1,6 +1,6 @@
 #! /usr/bin/env bash
 
-pushd ../.. > /dev/null
+cd ../.. > /dev/null
 
 # grid-search for hyper-parameters in language model
 CUDA_VISIBLE_DEVICES=0,1,2,3 \
diff --git a/deep_speech_2/examples/mandarin/run_demo_client.sh b/deep_speech_2/examples/mandarin/run_demo_client.sh
index bf8e545147233283738af467f4320759b8ac2d75..6ae4ddcab92e8cf3b207987513b438cf73e194ee 100644
--- a/deep_speech_2/examples/mandarin/run_demo_client.sh
+++ b/deep_speech_2/examples/mandarin/run_demo_client.sh
@@ -1,6 +1,6 @@
 #! /usr/bin/env bash
 
-pushd ../.. > /dev/null
+cd ../.. > /dev/null
 
 # start demo client
 CUDA_VISIBLE_DEVICES=0 \
diff --git a/deep_speech_2/examples/mandarin/run_demo_server.sh b/deep_speech_2/examples/mandarin/run_demo_server.sh
index b0d4bc7f1179fdcb90e3ceef57ec346ba2b9d558..d98a99d01f8fc7a27fb3113ab984edf458dbab3b 100644
--- a/deep_speech_2/examples/mandarin/run_demo_server.sh
+++ b/deep_speech_2/examples/mandarin/run_demo_server.sh
@@ -1,24 +1,24 @@
 #! /usr/bin/env bash
 # TODO: replace the model with a mandarin model
 
-pushd ../.. > /dev/null
+cd ../.. > /dev/null
 
 # download language model
-pushd models/lm > /dev/null
+cd models/lm > /dev/null
 sh download_lm_en.sh
 if [ $? -ne 0 ]; then
     exit 1
 fi
-popd > /dev/null
+cd - > /dev/null
 
 
 # download well-trained model
-pushd models/librispeech > /dev/null
+cd models/librispeech > /dev/null
 sh download_model.sh
 if [ $? -ne 0 ]; then
     exit 1
 fi
-popd > /dev/null
+cd - > /dev/null
 
 
 # start demo server
diff --git a/deep_speech_2/examples/tiny/run_data.sh b/deep_speech_2/examples/tiny/run_data.sh
index a98dab21439d3479c18710f8cb7b01ba67b2ca8f..0b03ec5d1274d917f77c87280ce33bbcf828ba11 100644
--- a/deep_speech_2/examples/tiny/run_data.sh
+++ b/deep_speech_2/examples/tiny/run_data.sh
@@ -1,6 +1,6 @@
 #! /usr/bin/env bash
 
-pushd ../.. > /dev/null
+cd ../.. > /dev/null
 
 # prepare folder
 if [ ! -e data/tiny ]; then
diff --git a/deep_speech_2/examples/tiny/run_infer.sh b/deep_speech_2/examples/tiny/run_infer.sh
index 85b083a277a2e2e222be790414f7cee07d630958..cbd049a6b67f4abe679343bc004ed4452962cb86 100644
--- a/deep_speech_2/examples/tiny/run_infer.sh
+++ b/deep_speech_2/examples/tiny/run_infer.sh
@@ -1,14 +1,14 @@
 #! /usr/bin/env bash
 
-pushd ../.. > /dev/null
+cd ../.. > /dev/null
 
 # download language model
-pushd models/lm > /dev/null
+cd models/lm > /dev/null
 sh download_lm_en.sh
 if [ $? -ne 0 ]; then
     exit 1
 fi
-popd > /dev/null
+cd - > /dev/null
 
 
 # infer
diff --git a/deep_speech_2/examples/tiny/run_infer_golden.sh b/deep_speech_2/examples/tiny/run_infer_golden.sh
index 3ee2f9aefef6e6530387a53bd31933e780a17670..6567542be08b60f350c34ece7df85a7702ea09a2 100644
--- a/deep_speech_2/examples/tiny/run_infer_golden.sh
+++ b/deep_speech_2/examples/tiny/run_infer_golden.sh
@@ -1,23 +1,23 @@
 #! /usr/bin/env bash
 
-pushd ../.. > /dev/null
+cd ../.. > /dev/null
 
 # download language model
-pushd models/lm > /dev/null
+cd models/lm > /dev/null
 sh download_lm_en.sh
 if [ $? -ne 0 ]; then
     exit 1
 fi
-popd > /dev/null
+cd - > /dev/null
 
 
 # download well-trained model
-pushd models/librispeech > /dev/null
+cd models/librispeech > /dev/null
 sh download_model.sh
 if [ $? -ne 0 ]; then
     exit 1
 fi
-popd > /dev/null
+cd - > /dev/null
 
 
 # infer
diff --git a/deep_speech_2/examples/tiny/run_test.sh b/deep_speech_2/examples/tiny/run_test.sh
index 063076328a8dcee327712db7fae3e5333d01dd40..690dfe739d1e0ab2192198a0e88edc0f55fdc23c 100644
--- a/deep_speech_2/examples/tiny/run_test.sh
+++ b/deep_speech_2/examples/tiny/run_test.sh
@@ -1,14 +1,14 @@
 #! /usr/bin/env bash
 
-pushd ../.. > /dev/null
+cd ../.. > /dev/null
 
 # download language model
-pushd models/lm > /dev/null
+cd models/lm > /dev/null
 sh download_lm_en.sh
 if [ $? -ne 0 ]; then
     exit 1
 fi
-popd > /dev/null
+cd - > /dev/null
 
 
 # evaluate model
diff --git a/deep_speech_2/examples/tiny/run_test_golden.sh b/deep_speech_2/examples/tiny/run_test_golden.sh
index 351cb87cb71c1ea9b86cebec097065db55c2c650..16adf29888212ef9de986ffe89181235cff8d623 100644
--- a/deep_speech_2/examples/tiny/run_test_golden.sh
+++ b/deep_speech_2/examples/tiny/run_test_golden.sh
@@ -1,23 +1,23 @@
 #! /usr/bin/env bash
 
-pushd ../.. > /dev/null
+cd ../.. > /dev/null
 
 # download language model
-pushd models/lm > /dev/null
+cd models/lm > /dev/null
 sh download_lm_en.sh
 if [ $? -ne 0 ]; then
     exit 1
 fi
-popd > /dev/null
+cd - > /dev/null
 
 
 # download well-trained model
-pushd models/librispeech > /dev/null
+cd models/librispeech > /dev/null
 sh download_model.sh
 if [ $? -ne 0 ]; then
     exit 1
 fi
-popd > /dev/null
+cd - > /dev/null
 
 
 # evaluate model
diff --git a/deep_speech_2/examples/tiny/run_train.sh b/deep_speech_2/examples/tiny/run_train.sh
index 957aa63bca15896fddc3dcb295996a4ce55c06a0..88b09bee5d1017bf45c8682e9b27403aaa021d3e 100644
--- a/deep_speech_2/examples/tiny/run_train.sh
+++ b/deep_speech_2/examples/tiny/run_train.sh
@@ -1,6 +1,6 @@
 #! /usr/bin/env bash
 
-pushd ../.. > /dev/null
+cd ../.. > /dev/null
 
 # train model
 # if you wish to resume from an exists model, uncomment --init_model_path
diff --git a/deep_speech_2/examples/tiny/run_tune.sh b/deep_speech_2/examples/tiny/run_tune.sh
index 564da4acdb22b8f47214b38a685a2f3c871a50c1..89f8adf45312517f3b118309eade15bda617125a 100644
--- a/deep_speech_2/examples/tiny/run_tune.sh
+++ b/deep_speech_2/examples/tiny/run_tune.sh
@@ -1,6 +1,6 @@
 #! /usr/bin/env bash
 
-pushd ../.. > /dev/null
+cd ../.. > /dev/null
 
 # grid-search for hyper-parameters in language model
 CUDA_VISIBLE_DEVICES=0,1,2,3,4,5,6,7 \
diff --git a/deep_speech_2/models/aishell/download_model.sh b/deep_speech_2/models/aishell/download_model.sh
index 77fc84b5322d2301ae8bc8caabed7c27dd5f932d..19aec554e209690cde4151b7f168bcf542c22224 100644
--- a/deep_speech_2/models/aishell/download_model.sh
+++ b/deep_speech_2/models/aishell/download_model.sh
@@ -1,6 +1,6 @@
 #! /usr/bin/env bash
 
-source ../../utils/utility.sh
+. ../../utils/utility.sh
 
 URL='http://cloud.dlnel.org/filepub/?uuid=6c83b9d8-3255-4adf-9726-0fe0be3d0274'
 MD5=28521a58552885a81cf92a1e9b133a71
diff --git a/deep_speech_2/models/librispeech/download_model.sh b/deep_speech_2/models/librispeech/download_model.sh
index 7c46c09915137cdb124a9abeb6910730c43d0f89..0048ff166f4574625a8bfed3959389d7d5cf0061 100644
--- a/deep_speech_2/models/librispeech/download_model.sh
+++ b/deep_speech_2/models/librispeech/download_model.sh
@@ -1,6 +1,6 @@
 #! /usr/bin/env bash
 
-source ../../utils/utility.sh
+. ../../utils/utility.sh
 
 URL='http://cloud.dlnel.org/filepub/?uuid=8e3cf742-2ff3-41ce-a49d-f6158cc06a23'
 MD5=2ef08f8b608a7c555592161fc14d81a6
diff --git a/deep_speech_2/models/lm/download_lm_ch.sh b/deep_speech_2/models/lm/download_lm_ch.sh
index 46bfe9329949fb0b9d579e09c8b77bc68c73776a..c719f9a9f26368c17c8ef8651f36dfec194da0a2 100644
--- a/deep_speech_2/models/lm/download_lm_ch.sh
+++ b/deep_speech_2/models/lm/download_lm_ch.sh
@@ -1,6 +1,6 @@
 #! /usr/bin/env bash
 
-source ../../utils/utility.sh
+. ../../utils/utility.sh
 
 URL=http://cloud.dlnel.org/filepub/?uuid=d21861e4-4ed6-45bb-ad8e-ae417a43195e
 MD5="29e02312deb2e59b3c8686c7966d4fe3"
diff --git a/deep_speech_2/models/lm/download_lm_en.sh b/deep_speech_2/models/lm/download_lm_en.sh
index fbfe647e9ece114f09fffee26aa427c489c9ee35..d131636e80b0907a94712eef6baf72afadb05477 100644
--- a/deep_speech_2/models/lm/download_lm_en.sh
+++ b/deep_speech_2/models/lm/download_lm_en.sh
@@ -1,6 +1,6 @@
 #! /usr/bin/env bash
 
-source ../../utils/utility.sh
+. ../../utils/utility.sh
 
 URL=http://paddlepaddle.bj.bcebos.com/model_zoo/speech/common_crawl_00.prune01111.trie.klm
 MD5="099a601759d467cd0a8523ff939819c5"