what is atexit in unix?
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The atexit() function registers the given function to be called at normal process termination, either via exit(3) or via return from the program's main(). Functions so registered are called in the reverse order of their registration; no arguments are passed.
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AIX is based on UNIX System V with 4.3BSD-compatible extensions. It is one of five commercial operating systems that have versions certified to The Open Group's UNIX 03 standard (the others being macOS, Solaris, HP-UX, and eulerOS).
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ethtool Commands and Examples. ethtool is a networking utility on Linux. It is used to configure Ethernet devices on Linux. ethtool can also be used to find a lot of information about connected Ethernet devices on your Linux computer.
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Mcopy translates incoming carriage return/line feeds to line feeds when copying from Dos to Unix, and vice-versa when copying from Unix to Dos. b. Batch mode. Optimized for huge recursive copies, but less secure if a crash happens during the copy.
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gpasswd command is used to administer the /etc/group and /etc/gshadow. As every group in Linux has administrators, members, and a password. ... System administrators can use the -A option to define group administrator(s) and -M option to define members. They have all rights of the group administrators and members.
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['To enter vi, type: vi filename <Return>', 'To enter insert mode, type: i.', 'Type in the text: This is easy.', 'To leave insert mode and return to command mode, press: <Esc>', 'In command mode, save changes and exit vi by typing: :wq <Return> You are back at the Unix prompt.']
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The Active Directory Migration Tool (ADMT) is a Microsoft software application that helps you manage and perform the necessary operations to move AD objects. You can move objects within the same domain forest (intraforest) or to a different forest (interforest).
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['bind <key> <command> - Binds a key to a command.', 'bind <key> - Displays the command the given key is bound to.', 'unbind <key> - Unbinds a key.', 'unbindall - Unbinds all keys.', 'dropitem - Drop the flag or Intelligence.', 'kill - Commit suicide.', 'explode - Commit suicide by exploding into gibs.']
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Xargs is a great command that reads streams of data from standard input, then generates and executes command lines; meaning it can take output of a command and passes it as argument of another command. If no command is specified, xargs executes echo by default.
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Actually exit() function performs some cleaning before termination of the program like connection termination, buffer flushes etc. The _Exit() function in C/C++ gives normal termination of a program without performing any cleanup tasks. For example it does not execute functions registered with atexit.
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['Create a text file with folder names. ... ', 'Save as folders. ... ', 'Open Terminal (Mac/Unix only). ... ', 'Type the command: $ cat folders.txt | xargs mkdir. ... ', "You're done!"]
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mlocate (Merging Locate) is a more secure version of the locate utility, that only shows files accessible to the user. locate is a common Unix tool for quickly finding files by name. It offers speed improvements over the find tool by searching a pre-constructed database file, rather than the filesystem directly.
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['Unix Video #8:', '#1) cmp: This command is used to compare two files character by character.', '#2) comm: This command is used to compare two sorted files.', '#3) diff: This command is used to compare two files line by line.', '#4) dircmp: This command is used to compare the contents of directories.']
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adtool is a unix command line utility for Active Directory administration. Features include user and group creation, deletion, modification, password setting and directory query and search capabilities.
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['In the command line, type ntdsutil and press enter. ... ', 'At the Ntdsutil: prompt, type metadata cleanup. ... ', "At the 'metadata cleanup:' prompt, type connections and press Enter. ... ", "In 'server connections:', type : ... ", "Type 'q' in server connections to quit and press Enter to return to the metadata cleanup prompt."]
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AMD NX (No Execute) and Intel XD (Execute Disable) are technologies used in CPUs to mark certain areas of memory as non-executable, in order to prevent malicious software exploits and buffer overflow attacks. These technologies are turned on (exposed) by default for all guest operating systems that support them.
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Arpwatch is an open source computer software program that helps you to monitor Ethernet traffic activity (like Changing IP and MAC Addresses) on your network and maintains a database of ethernet/ip address pairings.