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<>Linux文件系统MindMap
* 查看Linux是多少位的 getconf LONG_BIT
* 查看CPU详情 cat /proc/cpuinfo
* 查看cpu核心数量 cat /proc/cpuinfo | grep 'cpu cores' | uniq
* =查看cpu型号 cat /proc/cpuinfo | grep 'model name' | uniq
<>查看硬盘空间大小
df -h
* /dev : 设备文件存储目录,应用程序通过对这些文件的读写和控制,可以访问实际的设备;
* dev/shm : 首先了解什么是tmpfs,
1、tmpfs 是一个文件系统,而不是块设备;您只是安装它,它就可以使用了。
2.动态文件系统的大小。
3.tmpfs 的另一个主要的好处是它闪电般的速度。因为典型的 tmpfs 文件系统会完全驻留在 RAM 中,读写几乎可以是瞬间的。
4.tmpfs 数据在重新启动之后不会保留,因为虚拟内存本质上就是易失的。所以有必要做一些脚本做诸如加载、绑定的操作。
其次,
linux下/dev/shm的容量默认最大为内存的一半大小。但它并不会真正的占用这块内存,如果/dev/shm/下没有任何文件,它占用的内存实际上就是0字节;如果它最大为1G,里头放有100M文件,那剩余的900M仍然可为其它应用程序所使用,但它所占用的100M内存,是绝不会被系统回收重新划分的。
* /home : 一般有什么文件都会放在这里.
cd /home : 会显示这台机器的用户。
* / : 根目录.
cd / : 从任何用户执行该命令都会进入同一个目录,即所有用户共享。