Linux system, use the following command to view the contents of the file:
Cat
The TAC starts from the last line and can see that the TAC is written backwards by cat!
NL display, the output line number!
More page-by-page display file contents
Less is similar to more, but better than more. He is able to page forward!
Head's just a few lines.
Tail just look at the tail a few lines
Cat
Cat [-abentv]
Options and number of references:
-A: Equivalent to-vet's integration options, you can list some special characters rather than blanks;
-B: Lists line numbers and displays only line numbers for non-blank lines. Blank lines are not marked with line numbers!
-E: Displays the end of the break byte $;
-N: Print the travel number, along with the blank line will also have line number, and the option of-B is different;
-T: Displays the [tab] key in ^i;
-V: Lists some special characters that can't be seen
TACThe TAC is just the opposite of the cat command. The contents of the file start from the last line
nl
NL [-BNW] File
Options and number of references:
-B: Specifies the way the line number is specified, mainly in two ways:
-B A: Indicates the same line number (similar to cat-n), whether or not it is a blank line;
-B T: Suppose you have a blank line. The empty row does not list line numbers (default values);
-N: List the method of line number representation, there are three main kinds:
-N LN: The line number is displayed at the left of the screen;
-N RN: The line number is displayed on the very right of its own field and does not add 0.
-N RZ: The line number is displayed on the very right of its own field. and add 0.
-W: The number of digits occupied by the line number field.
MoreDuring the execution of the more this program. You have several keys that you can press:
Blank Key (space): Represents a page down;
Enter: Represents a downward turn "line";
/string: Represents the content in this display, searching down the "string" for this keyword.
: F: Immediately displays the file name and the number of rows displayed at the moment;
Q: The delegate immediately leaves more and no longer displays the contents of the file.
b or [Ctrl]-b: Represents the page back, but this action is only practical for the file, the pipeline is useless.
LessThe commands you can enter when executing are:
Blank key: Flip one Page down;
[PageDown]: Flip one page down.
[PageUp]: Flip up one page;
/string: Search down the function of "string".
?
String: Search for the "string" function.
N: Repeat the previous search (with/or?)
)
N: Reverse repeated previous search (with/or?). )
Q: Leave less this program;
Head
Head [-N number] File
Options and number of references:
-N: followed by a number that represents the meaning of a few lines
Tail
tail [-N number] File
Options and number of references:
-N: followed by numbers. The representative shows the meaning of several lines
-F: Indicates the file name that is followed by the continuous detection, to wait until [ctrl]-c will end tail discovery
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Linux This file command to view content
