slides.01.pdf
... Files – Concepts (2/2) • Files are protected: – Each file can be accessed by (1) its owner, (2) a group member, or (3) everyone else. – Each file allows access for reading (r), writing ...
... Files – Concepts (2/2) • Files are protected: – Each file can be accessed by (1) its owner, (2) a group member, or (3) everyone else. – Each file allows access for reading (r), writing ...
eFS: encrypted File system
... Ensure that private data is not accessed by other users ( may not be malicious). ...
... Ensure that private data is not accessed by other users ( may not be malicious). ...
Unix/Linux: History and Philosophy
... • External commands – Act just like the built in commands – User may not be able to tell the difference – Newly added commands become part of the system ...
... • External commands – Act just like the built in commands – User may not be able to tell the difference – Newly added commands become part of the system ...
Operating Systems
... where # is the number of the Linux server that you have connected to. You may use any of the Linux servers. • The number in the brackets will change as you work. It is the “number” of the command that you are about to type. • If this prompt is not on the screen at any time, you are not communicating ...
... where # is the number of the Linux server that you have connected to. You may use any of the Linux servers. • The number in the brackets will change as you work. It is the “number” of the command that you are about to type. • If this prompt is not on the screen at any time, you are not communicating ...
Unix Intro PowerPoint
... The kernel is the base operating system, which interacts directly with the hardware and services the user ...
... The kernel is the base operating system, which interacts directly with the hardware and services the user ...
Book cover slide
... programming language that was independent of the hardware on which it needed to operate. Most versions of UNIX do not have a graphical user interface (GUI) but in recent years a lot of work has been done to make UNIX easier to use. ...
... programming language that was independent of the hardware on which it needed to operate. Most versions of UNIX do not have a graphical user interface (GUI) but in recent years a lot of work has been done to make UNIX easier to use. ...
ppt - Purdue University :: Computer Science
... Superblock – Contain information about the number of data blocks in the partition, number of inodes, bitmap for used/free inodes, and bitmap for used/free blocks, the inode for the root directory and other partition information. Inode-list – It is a list of I-nodes. An inode has information about a ...
... Superblock – Contain information about the number of data blocks in the partition, number of inodes, bitmap for used/free inodes, and bitmap for used/free blocks, the inode for the root directory and other partition information. Inode-list – It is a list of I-nodes. An inode has information about a ...
NETWORK OPERATING SYSTEMS
... The term filesystem has two somewhat different meanings, both of which are commonly used. This can be confusing to novices, but after a while the meaning is usually clear from the context. One meaning is the entire hierarchy of directories (also referred to as the directory tree) that is used to org ...
... The term filesystem has two somewhat different meanings, both of which are commonly used. This can be confusing to novices, but after a while the meaning is usually clear from the context. One meaning is the entire hierarchy of directories (also referred to as the directory tree) that is used to org ...
General overview of the System
... • Permission to access a file is controlled by access permissions associated with the file. • Access permissions can be set independently to control read, write and execute permission for three classes of users : the file owner, a file group, other users. •Users may create files if directory access ...
... • Permission to access a file is controlled by access permissions associated with the file. • Access permissions can be set independently to control read, write and execute permission for three classes of users : the file owner, a file group, other users. •Users may create files if directory access ...
UNIX/LINUX
... BSD(Berkeley Software Distribution), Solaris (Sun Microsystems, and XENIX (Microsoft). ...
... BSD(Berkeley Software Distribution), Solaris (Sun Microsystems, and XENIX (Microsoft). ...
Solution to Lab Project 2.1
... MORE When you run a command and the screen output is too big to fit on it, using the MORE filter command will display one screen at a time. ...
... MORE When you run a command and the screen output is too big to fit on it, using the MORE filter command will display one screen at a time. ...
Lecture 11
... sensitive to the previous head position. Most disk scheduling algorithms focus on this. ...
... sensitive to the previous head position. Most disk scheduling algorithms focus on this. ...
L03 - UMBC
... The current directory is where you are located at any time while you are using the system. The / (pronounced “slash”) is the root directory in Linux. Files within the same directory must be given unique ...
... The current directory is where you are located at any time while you are using the system. The / (pronounced “slash”) is the root directory in Linux. Files within the same directory must be given unique ...
Directories
... i/o in large chunks and want the kernel to perform buffering for them. • Device files are characterized by two numbers, called the major and minor device numbers. • The major device number tells the kernel which driver the file refers to, and the minor device number typically tells the driver which ...
... i/o in large chunks and want the kernel to perform buffering for them. • Device files are characterized by two numbers, called the major and minor device numbers. • The major device number tells the kernel which driver the file refers to, and the minor device number typically tells the driver which ...
Linux Kernel—File Systems
... contains pointers to functions that can be used to act on any file An open file descriptor contains pointer to functions which can only ...
... contains pointers to functions that can be used to act on any file An open file descriptor contains pointer to functions which can only ...
L03 - UMBC
... The current directory is where you are located at any time while you are using the system. The / (pronounced “slash”) is the root directory in Linux. Files within the same directory must be given unique ...
... The current directory is where you are located at any time while you are using the system. The / (pronounced “slash”) is the root directory in Linux. Files within the same directory must be given unique ...
No Slide Title
... programs, networks, and device drivers. •The FAT32 file system was designed to support hard drives up to 2048 GB. •FAT32 file system, the root directory can be located anywhere on the hard disk. This is very useful because if the section of the hard disk containing the root directory were to become ...
... programs, networks, and device drivers. •The FAT32 file system was designed to support hard drives up to 2048 GB. •FAT32 file system, the root directory can be located anywhere on the hard disk. This is very useful because if the section of the hard disk containing the root directory were to become ...
Lab 1 – Using the File System through Windows Explorer
... 1. File System: Windows Explorer file management system 2. Drives: or specifically a drive letter assigned for each storage device 3. Directories/ Folders: files are organized into folders (also called directories) 4. File operations: operations which can be performed on files 5. File attributes: ch ...
... 1. File System: Windows Explorer file management system 2. Drives: or specifically a drive letter assigned for each storage device 3. Directories/ Folders: files are organized into folders (also called directories) 4. File operations: operations which can be performed on files 5. File attributes: ch ...
Linux Help Session
... -x : the maximum number of days between changes -w : the number of days a warning is issued before a password expires -i the number of days of inactivity between the expiry of a password and the time the account is locked ...
... -x : the maximum number of days between changes -w : the number of days a warning is issued before a password expires -i the number of days of inactivity between the expiry of a password and the time the account is locked ...
MBG404_LS_02
... • C:\test.exe “c:\document and settings\input.txt” » Some operating systems or programs want to receive switches before parameters are given ...
... • C:\test.exe “c:\document and settings\input.txt” » Some operating systems or programs want to receive switches before parameters are given ...
Lecture slides
... Each inode describes a data structure on the hard disk. When a hard disk is initialized to accept data storage, usually during the initial system installation process or when adding extra disks to an existing system, a fixed number of inodes per partition is created. This number will be the maximum ...
... Each inode describes a data structure on the hard disk. When a hard disk is initialized to accept data storage, usually during the initial system installation process or when adding extra disks to an existing system, a fixed number of inodes per partition is created. This number will be the maximum ...
OPERATING SYSTEMS: DESIGN AND IMPLEMENTATION
... Create a new entry, name2, pointing to name1 Remove a directory entry Mount a file system Unmount a file system Flush all cached blocks to the disk Change the working directory Change the root directory ...
... Create a new entry, name2, pointing to name1 Remove a directory entry Mount a file system Unmount a file system Flush all cached blocks to the disk Change the working directory Change the root directory ...
int_unix - Pablo Manalastas, PhD
... PS1 PS2 – primary and secondary prompts HOME – user's home directory LOGNAME – user's login name SHELL – user's shell program ...
... PS1 PS2 – primary and secondary prompts HOME – user's home directory LOGNAME – user's login name SHELL – user's shell program ...
Document
... NTFS: New Technology File System is the file system of choice used in today’s Microsoft OSs (2000, XP, Vista, 2008). It is a Microsoft proprietary file system that provides many improvements over the old FAT file system, such as better security, extensions, longer names, etc. FAT: File Allocation Ta ...
... NTFS: New Technology File System is the file system of choice used in today’s Microsoft OSs (2000, XP, Vista, 2008). It is a Microsoft proprietary file system that provides many improvements over the old FAT file system, such as better security, extensions, longer names, etc. FAT: File Allocation Ta ...
file
... – The SCAN disk-scheduling algorithm works in a similar way, except instead of moving up and down, the read/write heads move in toward the spindle, then out toward the platter edge, then back toward the spindle, ...
... – The SCAN disk-scheduling algorithm works in a similar way, except instead of moving up and down, the read/write heads move in toward the spindle, then out toward the platter edge, then back toward the spindle, ...