diff --git a/README.linux.md b/README.linux.md
index 1c84f4adb0b0..899be7a15111 100644
--- a/README.linux.md
+++ b/README.linux.md
@@ -9,7 +9,7 @@
 - If you want to link cmake3 to cmake, run:
 
   ```bash
-    sudo ln -sf ../../bin/cmake3 /usr/local/bin/cmake
+    sudo ln -sf /usr/bin/cmake3 /usr/local/bin/cmake
   ```
 
 - Make sure that you add `/usr/local/lib` and `/usr/local/lib64` to
@@ -57,7 +57,9 @@ Use dependency script for CentOS.
 ## Common Platform Tasks:
 
 Make sure that you add `/usr/local/lib` to `/etc/ld.so.conf`,
-then run command `ldconfig`.
+then run command `ldconfig`. After building the optimizer, run
+`ldconfig` again to make sure necessary links and cache have
+been created for these shared libraries.
 
 1. ORCA requires [CMake](https://cmake.org) 3.x; make sure you have it installed.
    Installation instructions vary, please check the CMake website.
diff --git a/python-developer-dependencies.txt b/python-developer-dependencies.txt
index e6268fff903a..54d626d157a0 100644
--- a/python-developer-dependencies.txt
+++ b/python-developer-dependencies.txt
@@ -3,7 +3,6 @@ Jinja2==2.10
 parse-type==0.4.2
 pexpect==4.4.0
 PSI==0.3b2
-pysql==0.16
 PyYAML==3.12
 ptyprocess==0.5.2
-six==1.11.0
\ No newline at end of file
+six==1.11.0