记录几个命令
很简单的两个命令:
pgrep XXX 显示某命令的进程
改变环境变量：
export PATH='usr/local/bin/python3=$PATH'
切换java不同版本并且添加切换快捷命令
vim ~/.bash_profile
### JDK definition
JAVA_08="/Library/Java/JavaVirtualMachines/jdk1.8.0_191.jdk/Contents/Home"
JAVA_11="/Library/Java/JavaVirtualMachines/adoptopenjdk-11.jdk/Contents/Home"
JAVA_17="/Library/Java/JavaVirtualMachines/jdk-17.jdk/Contents/Home"
### alias
alias j8='sed -i "" "/export JAVA_HOME=//d" ~/.bash_profile && echo "export JAVA_HOME=$JAVA_08" >> ~/.bash_profile && source ~/.bash_profile && echo "Switch to Java8"'
alias j11='sed -i "" "/export JAVA_HOME=//d" ~/.bash_profile && echo "export JAVA_HOME=$JAVA_11" >> ~/.bash_profile && source ~/.bash_profile && echo "Switch to Java11"'
alias j17='sed -i "" "/export JAVA_HOME=//d" ~/.bash_profile && echo "export JAVA_HOME=$JAVA_17" >> ~/.bash_profile && source ~/.bash_profile && echo "Switch to Java17"'
alias jv='java -version'
source ~/.bash_profile