kill all processes accessing the file system

... access the data in the file and is used by the kernel, the file handle is for the opening program The open call enters the virtual file system (VFS) in the kernel, and when it is realized that the ... when opening the file the kernel will want to a lookup operation to find the inode of the file and return a file handle associated with the file to the program The inode contains the information ... display the contents of a Coda file What actually happens? The cat program will make a few system calls in relation to the file A system call is an operation through which a program asks the kernel...

Ngày tải lên: 18/10/2022, 07:02

... dates of the certificate. The third check is whether the host requested in the URL is the same as the host to which the certificate was issued. These will usually be the same, but if the machine ... operating system authentication; Oracle will go to the host operating system and check whether the operating system user running SQL*Plus is a member of the operating system group that owns the Oracle ... allow the operating system to find the emctl utility. The ORACLE_HOME and ORACLE_SID are needed so that emctl can find the Database Control configuration files. These are in three places: the...

Ngày tải lên: 06/07/2014, 13:20

... Locality and The Fast File System When the U NIX operating system was first introduced, the U NIX wizard himself Ken Thompson wrote the first file system We will call that the “old U NIX file system? ??, ... Is The Solution A group at Berkeley decided to build a better, faster file system, which they cleverly called the Fast File System (FFS) The idea was to design the file system structures and allocation ... how many inodes there are, a pointer to the head of a free list of blocks, and so forth The inode region of the disk contained all the inodes for the file system Finally, most of the disk was taken...

Ngày tải lên: 16/08/2016, 18:50

... to the file server (the group of which they called Vice), which would then traverse the pathname, find the desired file, and ship the entire file back to the client The client-side code would then ... the entire file on the server last and thus will be the “winning” file, i.e., the file that remains on the server for others to see The result is a file that was generated in its entirety either ... then in home to find remzi, and so forth, all the way down the path until finally the desired file is located With many clients accessing the server at once, the designers of AFS found that the...

Ngày tải lên: 16/08/2016, 19:11

... Automatic Mounting of File Systems 8-11 The Virtual File System Table: /etc/vfstab .8-11 The /etc/vfstab File 8-11 The /usr/sbin/ mountall Command .8-13 Checking File Systems Before ... restoresymtable File 17-15 Preparing to Restore File Systems 17-15 Restoring the root (/) File System 17-16 Restoring the /usr and /var File Systems .17-17 Restoring Regular File Systems ... and File Systems The Directory Hierarchy Device Configuration Disks, Slices, and Format The Solaris Operating Environment ufs File System Mounting File Systems Maintaining File Systems Processes...

Ngày tải lên: 15/03/2014, 19:20

... writes, then reads the file back sequentially, then writes 100 Mbytes randomly to the existing file, then reads 100 Mbytes randomly from the file, and finally reads the file sequentially again The bandwidth ... (i-number for the directory and the position ferent to the users than the Unix FFS-like file system in within the directory), the contents of the directory entry Sprite The reason is that the machines ... Initially all the free space is in a single extent on disk, but by the time the log reaches the end of the disk the free space will have been fragmented into many small extents corresponding to the...

Ngày tải lên: 12/09/2012, 15:05

... Mounts, and File Systems The /proc file system also contains information about the disk drives present in the system and the file systems mounted from them 7.5.1 File Systems The /proc/filesystems ... special file systems such as the /proc file system, this is none The second element is the mount point, the place in the root file system at which the file system contents appear For the root file system ... contents of /proc/filesystems list only file system types that either are statically linked into the kernel or are currently loaded Other file system types may be available on the system as modules...

Ngày tải lên: 26/01/2014, 07:20

... system The overhead of allocating blocks in the new system is greater than the overhead of allocating blocks in the old system, however fewer blocks need to be allocated in the new system because they ... file typically create the new version as a temporary file and then rename the temporary file with the name of the target file In the old UNIX file system renaming required three calls to the system ... or the system crashed between these calls, the target file could be left with only its temporary name To eliminate this possibility the rename system call has been added The rename call does the...

Ngày tải lên: 12/09/2012, 14:16

... of the Financial System Identify the key components of the financial system SUMMARY The financial system channels funds from savers to borrowers The three key components of the financial system ... framework that allows them to apply the theory that they learn in the classroom to the practice of the real world By learning this framework, students will understand not just the 2007–2009 financial ... and the Financial System, ” we cover the key components of the financial system, introduce the Federal Reserve, and preview the important issues facing the financial system At the end of Chapter...

Ngày tải lên: 18/08/2013, 19:46

... dùng lệnh newfs), mkswap tạo swap file system Ví dụ mke2fs /dev/hda1 mkswap /dev/hda2 Mounting and unmounting file systems Mounting file systems Nh ta biêt hệ thống file UNIX đợc lu trữ dới dạng ... tất file systems đợc mount Chi tiết lệnh xem tài liệu ứng với loại hệ điều hành UNIX Unmounting file systems Để bỏ mount hệ thống file dùng lệnh umount umountall Lệnh umount: Bỏ mount hệ thống file ... dùng Linux ext2 Kiểu filesystem đợc dùng chủ yếu Linux partition iso9660 Kiểu ISO 9660 filesystem đợc dùng với CD-ROM disks sysv Kiểu Nhằm hỗ trợ cho dạng UNIX System V filesystem msdos Kiểu...

Ngày tải lên: 28/09/2013, 11:20

... /mnt/image Change to the mount point Create a directory on the file system Copy a file to the file system Leave the file system Unmount the file system With the virtual file system unmounted, you ... Mounting File Systems from the fstab File When you first install Linux, the /etc/fstab file is usually set up automatically to contain information about your root file systems and other file systems ... another system or burn it to a CD to use a file system in another location If you don’t want the file system any more, simply delete the file Viewing and Changing File System Attributes Using the...

Ngày tải lên: 29/09/2013, 22:20

... into another table called the ``inode list.'' The inode for a file is where all information about the file except its name is kept A directory entry generally consists of only two items, the filename ... fsize(*++argv); return 0; } The function fsize prints the size of the file If the file is a directory, however, fsize first calls dirwalk to handle all the files in it Note how the flag names S_IFMT ... to the next block in the chain, a record of the size of the block, and then the free space itself; the control information at the beginning is called the ``header.'' To simplify alignment, all...

Ngày tải lên: 30/09/2013, 06:20

... lệnh newfs), mkswap tạo swap file system Ví dụ mke2fs /dev/hda1 mkswap /dev/hda2 Mounting and unmounting file systems Mounting file systems Như ta đ biêt hệ thống file UNIX lưu trữ dạng thư mục ... tất file systems mount Chi tiết lệnh xem tài liệu ứng với loại hệ điều hành UNIX Unmounting file systems Để bỏ mount hệ thống file dùng lệnh umount umountall Lệnh umount: Bỏ mount hệ thống file ... Kiểu filesystem dùng chủ yếu Linux partition ỹ iso9660 Kiểu ISO 9660 filesystem dùng với CD-ROM disks 76 Giới thiệu UNIX- Một số thao tác UNIX ỹ sysv Kiểu Nhằm hỗ trợ cho dạng UNIX System V filesystem...

Ngày tải lên: 09/10/2013, 13:20

... make sure that there is enough available disk space in the file system at all times When the file system is almost full, the file system will allocate lots of CPU cycles to handle all the simultaneous ... needs to open the file It then uses that inode to open the file and present the data to the user This procedure works the same for every file system that can be used In a very basic file system such ... important of these is the data section This is the only section that is created by default The other two sections are the log section and the real-time section Organization of the XFS File System The...

Ngày tải lên: 19/10/2013, 02:20

... layer called the VFS (or Virtual File System) The VFS processes all file- oriented I/O system calls Based on the device that the operation is being performed on, the VFS decides which file system to ... specifies the number of blocks on the partition to allocate to the file system -c Be aware that creating a file system on a device with an existing file system will cause all data on the old file system ... ext2/ext3 filesystem, then reads the fstab file and remounts the root partition (and others) according to instructions in the file So what is in the file? An example line from the fstab file uses the...

Ngày tải lên: 19/10/2013, 02:20

... The important sections The root of the problem The top level of the Linux file hierarchy is referred to as the root (or /) The root directory typically contains several other directories ... form to create other directories off the root, nor should any other files be placed there Why root? The name “root” is based on the analogous relationship between the UNIX files system structure ... Every part of the file system eventually can be traced back to one central point, the root The concept of a “root” structure has now been (partially) adopted by other operating systems such as...

Ngày tải lên: 19/10/2013, 02:20

... Paradoxically, although BSD may not be called UNIX, its file system is called the UNIX File System The UNIX System Group, the developers of UNIX System V.4, adopted UFS as the standard file system for System ... normally the date that the file was last modified With the -u option to ls, you can list the last time the file was accessed • Finally comes the name of the file As you can see from this example, the ... (‘‘regular’’) files, they are called special files They’re not really files at all: they’re information about device support in the kernel, and the term device node is more accurate Conventionally, they are...

Ngày tải lên: 22/10/2013, 19:15