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| give the structure of a UNIX command |
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Definition
| command [[-] option(s)] [option argument(s)] [ command argument(s)] |
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| one or more modifiers that change the behavior of a command |
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| is one or more modifiers that change the behavior of [-option(s)] |
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| one or more objects that are affected by command |
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| contains the command ls and two options l and a |
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| contains the command ls, two options , l and a, and a command argument, m* |
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| lpr -Pspr -n 3 proposal.ps |
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| contains the command lpr; two options, P and n; two option arguments, spr and 3; and and a command argument, proposal.ps |
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| what happens if you type xy on the command line? |
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Definition
| And error message saying no such command is displayed |
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| what is file maintenance? |
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| the operation of organizing your files according to some logical scheme |
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| when you first log in you are working in the ___ ____ |
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| Whatever directory you are presently in is known as the ___ ___ ___ |
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| current working directory |
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| joins one or more files sequentially or displays them in the console window |
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| cat [options] [ file-list] |
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| display the files in the 'file-list' on the screen, one screen at a time |
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| more [options][file-list] |
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| copy file1 to file2; if file2 is a directory make a copy of file1 in this directory |
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| Move all the files in the file-list to 'directory' |
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| mv [options] [file-list] directory |
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| removes files in the file-list from the file structure (and disk) |
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| Sends the names of the files and directories in the directory specified by 'pathname-list' to the display screen |
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| ls [options] [pathname-list] |
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| display a / character after directory names, an *(asterisk) after binary executables, and an @ after symbolic links |
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| Display names of all the files, including hidden files |
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| display long list that includes file access modes, link count, owner, group, file size (in bytes) and modification time |
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| creates directory or directories specified in 'dirnames' |
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| mkdir [options][dirnames] |
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| change the current working directory to 'directory', or return to the home directory when 'directory' is omitted |
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| displays the current working directory on screen |
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| what three ways can you ascend back up to the home directory |
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| removes the empty directories specified in 'dirnames' |
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| rmdir [options][dirnames] |
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| one way to delete a non empty directory |
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rm -r
The r option recursively descends down into the sub-directory and deletes any files in it before actually deleting the directory itself. |
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| display UNIX Reference Manual Pages for command in 'command-list' one screenful at a time |
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| man [options][-s section] command-list |
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| display summaries of commands related to keywords in 'keyword-list' |
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| search the whatis database for abbreviated descriptions of each 'keyword' |
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| locate the binary, source , and man page files for a command |
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| whereis [options] filename |
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| displays the effective user id |
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| sends files to the printer |
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| displays the calendar on screen as text |
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| Write on the terminal screen or console window of the user with log-in name username; he user must be logged onto the system, and the user's terminal must have write access privileges given by the mesg command |
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| create pseudonym 'string' for the command 'name' |
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Definition
alias [name[=string]...] Bourne, Korn Bash shells
alis dir='ls -la\!*'
alias rename='mv\!*
alias spr='lpr -Pspr\!*'
alias ls='ls -C' |
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