Linux 常用命令

查看当前文件夹下 文件个数

[root@localhost ~]# cd /home/pso/images/chat/
[root@localhost chat]# ls -l |grep "^-"|wc -l                   
1523

增量复制 cp

[root@localhost chat]# cp -ru ../../../home/pso/images/chat/* ./

查找文件 find

[root@U10-33 bin]# find / -name 'jdk*'
/home/gedaiuat/jdk1.7.0_79
/home/gedaiuat/jdk1.7.0_79/lib/visualvm/profiler/lib/deployed/jdk16
/home/gedaiuat/jdk1.7.0_79/lib/visualvm/profiler/lib/deployed/jdk15
/home/gedaiuat/jdk-7u79-linux-x64.tar.gz

查看jdk版本

[root@U10-33 bin]# pwd
/opt/jdk1.8/bin
[root@U10-33 bin]# ./java -version
java version "1.8.0_60"
Java(TM) SE Runtime Environment (build 1.8.0_60-b27)
Java HotSpot(TM) 64-Bit Server VM (build 25.60-b23, mixed mode)