/ Root The root directory, present in all Linux filesystem structures, is the ancestor of in .NET Encoder Code 128A in .NET / Root The root directory, present in all Linux filesystem structures, is the ancestor of

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/ Root The root directory, present in all Linux filesystem structures, is the ancestor of using barcode integrated for visual studio .net control to generate, create barcode 128a image in visual studio .net applications. itf-14 all files in the filesystem. /bin Essential command binaries Holds the files needed to bring the system up and run it when it first barcode code 128 for .NET comes up in single-user mode (page 430)..

/boot Static files of the boot loader Contains all of the files needed to boot the system. / bin sbin var dev usr etc tmp home root mail spool sbin alex jenny Figure 6-10. A typical FHS-based Linux filesystem structure Directory Commands /dev Device f iles Contains all files that represent peripheral devices, such as disk drives,. terminals, an .net framework ANSI/AIM Code 128 d printers. Previously this directory was filled with all possible devices.

As of Fedora 3 and RHEL v.4, udev (page 482) provides a dynamic device directory that enables /dev to contain only devices that are present on the system..

/etc Machine local system configuration files Holds administrative, configuration, and other system Visual Studio .NET Code 128 files. One of the most important is /etc/passwd, which contains a list of all users who have permission to use the system.

. /etc/opt Conf iguration files for add-on software packages kept in /opt /etc/X11 Machine local configuration files for the X Window System /home User home directories Each user s home directory is typically one of many sub-. directories o Code 128 Code Set A for .NET f the /home directory. As an example, assuming that users directories are under /home, the absolute pathname of Jenny s home directory is /home/jenny.

On some systems the users directories may not be found under /home but instead might be spread among other directories such as /inhouse and /clients.. /lib Shared l ibraries /lib/modules Loadable kernel modules /mnt Mount point for temporarily mounting filesystems /opt Add-on software packages (optional packages) /proc Kernel and process information virtual filesystem /root Home directory for root /sbin Essential system binaries Utilities used for system administration are stored in /sbin. and /usr/sbin code 128b for .NET . The /sbin directory includes utilities needed during the booting process, and /usr/sbin holds utilities used after the system is up and running.

In older versions of Linux, many system administration utilities were scattered through several directories that often included other system files (/etc, /usr/bin, /usr/adm, /usr/include).. /sys Device p seudofilesystem See udev on page 482 for more information. /tmp Temporary files /usr Second major hierarchy Traditionally includes subdirectories that contain informa-. tion used by .NET USS Code 128 the system. Files in /usr subdirectories do not change often and may be shared by several systems.

. /usr/bin Most user commands Contains the standard Linux utility programs that is, bina-. ries that are .net framework code 128c not needed in single-user mode (page 430)..

/usr/games Ga mes and educational programs /usr/include Header files included by C programs /usr/lib Libraries /usr/local Local hierarchy Holds locally important files and directories that are added to the. system. Subdirectories can include bin, games, include, lib, sbin, share, and src. 200 6 The Linux Filesystem /usr/sbin Non .net framework code 128 code set c vital system administration binaries See /sbin. /usr/share Architecture-independent data Subdirectories can include dict, doc, games, info,.

locale, man, misc, terminfo, and zoneinfo. /usr/share/do code-128b for .NET c Documentation /usr/share/info GNU info system s primary directory /usr/share/man Online manuals /usr/src Source code /var Variable data Files with contents that vary as the system runs are kept in sub-. directories u nder /var. The most common examples are temporary files, system log files, spooled files, and user mailbox files. Subdirectories can include cache, lib, lock, log, opt, run, spool, tmp, and yp.

Older versions of Linux scattered such files through several subdirectories of /usr (/usr/adm, /usr/mail, /usr/spool, /usr/tmp).. /var/log Log files Contains lastlog (a record of the last login by each user), messages (system messages from rsyslogd), and wtmp (a record of all logins/logouts).. /var/spool Sp Code 128 Code Set B for .NET ooled application data Contains anacron, at, cron, lpd, mail, mqueue, samba,. and other directories. The file /var/spool/mail typically has a symbolic link in /var. Working with Directories This section covers deleting directories, copying and moving files between directories, and moving directories. It also describes how to use pathnames to make your work with Linux easier..

rmdir: Deletes a Directory The rmdir (re move directory) utility deletes a directory. You cannot delete the working directory or a directory that contains files other than the . and .

. entries. If you need to delete a directory that has files in it, first use rm to delete the files and then delete the directory.

You do not have to (nor can you) delete the . and ..

entries; rmdir removes them automatically. The following command deletes the promo directory:. $ rmdir /home/alex/literature/promo The rm utilit y has a r option (rm r filename) that recursively deletes files, including directories, within a directory and also deletes the directory itself.. Use rm r car visual .net Code 128 efully, if at all caution Although rm r is a handy command, you must use it carefully. Do not use it with an ambiguous.

file referenc e such as *. It is frighteningly easy to wipe out your entire home directory with a single short command..

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