Some random things to fix random things you encounter in life.

random_things.txt

# Following should fix npm install errors like "stack Error: not found: make" 
sudo apt-get install build-essential

# Elastic Beabstalk temp dployment folder
/tmp/deployment/application

# Elastic Beabstalk final dployment folder
/var/app/current

# Following will add /bin/node and /bin/npm symlinks to Beanstalk EC2 based on latest node installation available.
sudo ln -sf `ls -td /opt/elasticbeanstalk/node-install/node-* | head -1`/bin/node /bin/node
sudo ln -sf `ls -td /opt/elasticbeanstalk/node-install/node-* | head -1`/bin/npm /bin/npm

# Above can fail because it goes by folder date. This can cause the glbally available node to be 8x while you actually need 10x.
# You can use a specific version instead.
sudo ln -sf /opt/elasticbeanstalk/node-install/node-v10.16.3-linux-x64/bin/node /bin/node
sudo ln -sf /opt/elasticbeanstalk/node-install/node-v10.16.3-linux-x64/bin/npm /bin/npm

# Create or update symlink (use just -s switch to just create)
ln -sf /path/to/file /path/to/symlink

# Run "npm start" via pm2
pm2 start npm -- start

# Uninstall nvm
rm -rf $NVM_DIR ~/.npm ~/.bower

# Patch sudo node/npm/npx command not found error
sudo ln -s "$NVM_DIR/versions/node/$(nvm version)/bin/node" "/usr/local/bin/node"
sudo ln -s "$NVM_DIR/versions/node/$(nvm version)/bin/npm" "/usr/local/bin/npm"
sudo ln -s "$NVM_DIR/versions/node/$(nvm version)/bin/npx" "/usr/local/bin/npx

# Find port usage & kill
sudo netstat -tulpn
sudo fuser -k <port>/tcp
sudo kill -2 <pid>