How to update Android SDK components (this is necessary to accept licenses)

gistfile1.txt

# cd to ANDROID_SDK folder: 
cd /opt/android-sdk-linux

# show which packages are available for install (for example, for Build Tools 25:)
./tools/android list sdk --all | grep Build | grep 25

#   3- Android SDK Build-tools, revision 25.0.2
#   4- Android SDK Build-tools, revision 25.0.1
#   5- Android SDK Build-tools, revision 25
#  25- Android SDK Build-tools, revision 19.0.2 (Obsolete)

# install/update the necessary package
sudo ./tools/android update sdk -u -a -t 5

# some tools may require this command (use as an example only): 
sudo ./tools/bin/sdkmanager "extras;m2repository;com;android;support;constraint;constraint-layout;1.0.2"