Remove the warning message from the startup process of Hadoop

How to remove the warning message from the startup process of Hadoop
1. Because the warning occurs when you execute start-all.sh to start Hadoop, you should review start-all.sh and do more start-all.sh
You can see the following code:
If [-E ' $bin/: /libexec/hadoop-config.sh "]; Then
. "$bin"/.. /libexec/hadoop-config.sh
Else
. "$bin/hadoop-config.sh"
Fi
According to this code, you can judge that hadoop-config.sh should be viewed and executed more hadoop-config.sh
You can look at the following code:
If ["$HADOOP _home_warn_suppress" = ""] && ["$HADOOP _home"! = ""]; Then
echo "Warning: \ $HADOOP _home is deprecated." 1>&2
Echo 1>&2
If
According to this code can be judged hadoop_home_warn_suppress cannot be empty, all need to set in/etc/profile hadoop_home_warn_suppress
is not empty, it is feasible to execute vim/etc/profile, and then add Hadoop_home_warn_suppress=1 or other non-null values at the end of the profile file, and finally
To set up a refresh operation, execute source/etc/profile.

Remove the warning message from the startup process of Hadoop