September 01, 2015--course training

2, summarize the Disk Management and file system Management design of the use of various commands, and note certain examples;

Fdisk is the most commonly used hard disk partition tool partition Management sub-command:p:  display n:  Create d:  delete t:  Modify partition idl:  list all support ID types w:  Save exit q:  Discard changes and exit m:  Get Help file System Properties View and adjust tool: E2labele2lable device [label]tune2fs display the properties of the Ext series file system, or adjust its properties ;-L: Displays information in the Super block, displays information about the properties and layout of the entire file;-l  ' LABEL ': Modify the volume label;-m #:  Adjust the percentage of administrative space reserved to administrators;-j: ext2 -- > ext3-o: File System Properties start or close  -o: The file system default mount option is enabled or turned off dumpe2fs:-h:  only show Super block information;fsck: filesystem  checkfsck -t typefsck.type-a:  Automatic repair error-r:  Interactive repair error-f:  Force detection E2fsck:ext Series file system dedicated detection repair tool;-y:   Auto Answer "yes"-f:forcemount: reads the/etc/mtab file to display all devices that are already mounted on the current system; MOUNT -A: Mount all file systems in the/etc/fstab file that support automatic mounts ; mount [options] [-o options] device mount_point[options]: Command options [-o options] : Mount option device:  the device to mount (1)   Device file:/dev/sda5 (2)   label:-l  ' LABEL ' (3)  UUID:-U  ' UUID ' (4)   Pseudo file system name mount_point:  mount point common options:-t type: File system type-r:  mount this file system in read-only mode-w:  to read and write Mode mount this file system-N: Each file system automatically updates the/etc/mtab file when it is mounted, and-n is used to suppress this feature; At this point, if you want to view the mountedAll file system:cat /proc/mounts-a:  automatically mount all devices that support automatic mounting;-B: Bind directory to another directory;-o  mount option: Async: Async Mode sync:  Synchronization mode Atime/noatime: Whether to update the access timestamp, Diratime/nodiratime: Whether to update the directory's access timestamp;auto/noauto:  allow this device to be automatically mounted; exec/ NOEXEC: Whether the application is allowed to execute on this file system, Dev/nodev: whether to support the use of device files on this device, Suid/nosuid:remount: Re-mount rorwuser/nouser:  allow normal mount of this device ACL: whether to support the use of facl;defaults:rw, suid, dev, exec, auto, nouser, and  on this device Async swap partition: Free command: View memory and swap usage status-m: -g:  in GB  mkswap: Create swap partition mkswap [option]  device-l  ' LABEL ' swapon: Enable swap partition swapon [option] [device]-a:  activate all swap partitions-p priority:  Set its priority; Swapoff: Disable swap partition Swapoff [option] [device] link file on file system: Hard link: Two paths pointing to the same inode cannot be made to the directory Multiple different paths to the same inode cannot be made across partitions;  a hard link to create a file increases the Inode reference count; Deleting a hard link only deletes one of its access paths, and only the last path is deleted;  Symbolic Link: The data of the linked file points to another file path ; You can do the directory, you can cross the partition, point to another file path, not the inode; creating a symbolic link to a file does not increase its reference count; Delete the original file, the symbolic link file will not be;

September 01, 2015--course training