mount

We make and sell a device that our users will sometimes want to connect to their computer in large quantities with multiple USB hubs. It is a USB composite device that has both human interface (HID) and mass storage (MSD) interfaces. Windows automatically mounts the file-system of each device until it runs out of letters at 'Z:'. I can walk the device tree and get the device instance identifiers for the HID and USBSTOR interfaces using a combination of the PnP Configuration Manager and Device Installation functions. With the USB storage device path I can also get the disk number (i.e. \\.

df 查看磁盘空间使用情况 df: disk free 空余硬盘 1． 基本语法 df 选项 （功能描述：列出文件系统的整体磁盘使用量，检查文件系统的磁盘空间占用情况） 2． 选项说明 表 1-32 选项 功能 -h 以人们较易阅读的 GBytes, MBytes, KBytes 等格式自行显示； 3． 案例实操 （ 1 ）查看 磁盘使用情况 [root@hadoop101 ~]# df -h Filesystem Size Used Avail Use% Mounted on /dev/sda2 15G 3.5G 11G 26% / tmpfs 939M 224K 939M 1% /dev/shm /dev/sda1 190M 39M 142M 22% /boot fdisk 查看分区 1． 基本语法 fdisk -l （功能描述：查看磁盘分区详情） 2． 选项说明 表 1-33 选项 功能 -l 显示所有硬盘的分区列表 3． 经验技巧 该命令 必须在 root 用户下才能使用 4． 功能说明 （ 1 ） Linux 分区 Device： 分区序列 Boot： 引导 Start： 从 X 磁柱开始 End： 到 Y 磁柱结束 Blocks： 容量 Id： 分区类型 ID System： 分区类型 （ 2 ） Win7 分区 ，如图 1-157 所示 图 1-157 Win7 分区

I am reading the mount & clone man page. I want to clarify how CLONE_NEWNS effects the view of file system for the child process. (File hierarchy) Lets consider this tree to be the directory hierarchy. Lets says 5 & 6 are mount points in the parent process. I clarified mount points in another question . So my understanding is : 5 & 6 are mount points means that the mount command was used previously to 'mount' file systems (directory hierarchies) at 5 & 6 (which means there must be directory trees under 5 & 6 as well). From mount man page : A mount namespace is the set of filesystem mounts that

tmpfs tmpfs是一种虚拟内存文件系统, 它的存储空间在VM里面，现在大多数操作系统都采用了虚拟内存管理机制, VM(virtual memory) 是由linux内核里面的vm子系统管理. VM的大小由RM(Real Memory)和swap组成, RM就是物理内存, swap是通过硬盘虚拟出来的内存空间, 大小是可以配置的. swap的读写速度相对RM(Real Memory)要慢许多. 在物理内存不足时一个进程申请内存, 内核的vm子系统就会把RM里面的一些不常用的数据交换到swap里面, 在需要使用这些数据时再从Swap交换到RM里. tmpfs最大可用的存储空间等于 RM + swap, 但是tmpfs本身不知道实际使用的空间是RM还是swap. mkdir /tmp/memory mount -t tmpfs -o size=1024M tmpfs /tmp/memory 上面的命令分配了1GB的VM到/tmp/memory目录下, 可以用df命令查看. tmpfs一个优点就是它实际使用的空间是随着实际存储的数据而变化的, 如果/tmp/memory目录下什么也没有, tmpfs并不占用VM. 参数1024m只是告诉内核这个挂载点最大可用的VM为1024m, 如果不设置这个参数, tmpfs默认的大小是RM的一半, 假如物理内存是8GB

I'm making a small rails engine which I mount like this: mount BasicApp::Engine => "/app" Using this answer I have verified that all the routes in the engine are as the should be: However - when I (inside the engine) link to a named route (defined inside the engine) I get this error undefined local variable or method `new_post_path' for #<#<Class:0x000000065e0c08>:0x000000065d71d0> Running "rake route" clearly verifies that "new_post" should be a named path, so I have no idea why Rails (3.1.0) can't figure it out. Any help is welcome my config/route.rb (for the engine) look like this BasicApp:

On my Ubuntu linux box I can easily mount USB connected drives or CDROM clicking on devices icons that I can found on the Desktop. For example if I click on a USB connected drive icon the following things happen: a /media/LABEL directory is automatically created (where LABEL is the label of the disk and may vary from disk to disk) the filesystem on the device is mounted on /media/LABEL This process is significantly different from mounting using the mount command. In particular: you don't need to be root (or you don't need to modify /etc/fstab to allow ordinary user to mount the device) the

参考并感谢 官方文档 https://hub.docker.com/_/nginx 下载nginx镜像(不带tag标签则表示下载latest版本) docker pull nginx 启动 nginxTmp 容器,目的是为了拷贝配置文件 docker run -d \ -p 80:80 \ --name nxtmp \ nginx:latest 登录到容器中 docker exec -it nxtmp bash 通过 CONTAINER ID或名称 拷贝nginx配置文件夹到宿主机 docker cp nxtmp:/etc/nginx/ /var/docker/configs/ 通过 CONTAINER ID或名称 拷贝nginx日志文件夹到宿主机 docker cp nxtmp:/var/log/nginx/ /var/docker/logs/ 通过 CONTAINER ID或名称 拷贝nginx资源文件夹到宿主机 docker cp nxtmp:/usr/share/nginx/html/ /var/docker/resources/nginx/ 停止 nxtmp 容器 docker stop nxtmp 卸载删除 nxtmp 容器 docker rm nxtmp 带ssl证书启动nginx容器 docker run -d \ -p 80:80 \ -p 443:443 \ -

For info adb remount returns "remount failed: Operation not permitted" adb shell 'su -c mount -o rw,remount /system' returns unknown option -- o My device is rooted. Probable cause that remount fails is you are not running adb as root . Shell Script should be as follow. # Script to mount Android Device as read/write. # List the Devices. adb devices; # Run adb as root (Needs root access). adb root; # Since you're running as root su is not required adb shell mount -o rw,remount /; If this fails, you could try the below: # List the Devices. adb devices; # Run adb as root adb root; adb remount;