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UnixCh345.txt
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Name the vi editors 3 entry modes.
Command Mode, Text Entry Mode and Status Line Mode
Name the three kinds or regular files:
Unstructured ASCII character, Structured ASCII records, Structured ASCII trees.
UNIX/Linux store data as?
Flat ASCII files
Other name for input from keyboard?
Standard In (stdin)
Other name for output to monitor?
Standard Out (stdout)
Explain "touch" command:
updates a file's time and date stamps & creates empty files
Explain "rmdir" command:
removes empty directories
Explain "cut" command:
extracts specific columns or fields from a file
Explain "paste" command:
combines two or more files
explain "sort" command:
sorts a file's contents
explain "find" command:
locates files based on a search criteria
Explain "join" command:
extracts data from two files sharing a common field and uses this field to join the two files
Explain awk:
is a pattern-scanning and processing language useful for creating a formatted report with a professional look
Explain "comm" command:
compares sorted files and shows differences
Explain "diff" command:
compares and selects the differences in two files
explain "grep" command:
grep (Global Regular Expression Print) selects lines or rows
explain "head" command:
selects lines from the beginning of a file
explain "tail" command:
selects lines from the end of a file
explain "uniq" command:
selects unique lines or row
Explain "cat" command:
concatenates files, it also shows files in the stdout/ monitor
explain "chmod" command
changes the security mode of a file or directory
explain "pr" command
formats and prints
explain "sed" command
edits data streams or file editor designed to make global changes to large files
explain "tr" command:
translates and deletes character by character
what is the command to repeat the line just entered?
(.) period
what is the command use to undo?
u
Explain "a" command:
append below
explain "A" command:
append above
explain "o" command:
open below
explain "O" command:
open above
explain "R" command:
overstrike/overwrite
explain "dd." command:
Delete lines -- saves them into buffer -- copy
explain "p" command:
paste below
explain "P" command:
Paste above
explain "x" command:
delete individual character
explain "yy" command:
yank - copy
explain ":" command:
status line
explain ":q!" command:
Quit w/o saving
explain ":wq" command:
save and quit
explain ":w filename" command:
save as
explain "ZZ" command:
save and exit w/o prompting
explain Standard error (stderr)
error output to screen/monitor
explain "/" command:
search forward for a pattern of characters
explain "dw" command:
delete the word starting at the cursor. if the cursor is in the middle of the word, delete from the cursor to the end of the word
explain "d$" command:
delete from the cursor to the end of the line
explain "d0" command:
delete from the cursor to the start of the line
shell scripts should contain?
the command to execute, comments to identify and explain the script so that other users can understand how it works
explain "#" when used in the vi editor:
it's used to mark a comment
how to run a shell script?
"sh" followed by the name of the script or make the script executable and type "./" prior to the script name
Author
maovar
ID
11881
Card Set
UnixCh345.txt
Description
Guide to UNIX using Linux Chp 3, 4, & 5.
Updated
2010-03-25T00:24:46Z
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