View file contents of Linux commands

1 Cat: View file contents

Option:-B Displays line numbers, blank lines do not display line numbers

-N Displays line numbers, including blank lines

[[Email protected] ~] #cat-B a.txt

2 more: Page view the contents of the file, press space to view the next page, press Q to exit

[[Email protected] ~] #more a.txt

3 Less: Paging through the contents of the file, using the same way as VI, space (next page), B Key (previous), G (last line), G (first row)

[Email protected] ~]# LESS/ETC/PASSWD

4 Head: View the contents of the file header, default to the first 10 lines

Option:-N to display the contents of the top N rows

[Email protected] ~]# HEAD-20/ETC/PASSWD

5 Tail: View the contents of the end of the file, default to the last 10 lines

Option:-n Displays the contents of the end of the file n rows

-F Dynamic display of file contents, usually used to view the log, CTRL + C exit

[Email protected] ~]# TAIL-20/ETC/PASSWD

6 WC: Displays the statistics of the file's lines, words, and bytes

Option:-c displays statistics for bytes

-l Display Row count statistics

-W Display word statistics

[Email protected] ~]# wc-w a.txt

7 grep: Find keywords and print matching lines

Option:-I ignores case

-V to reverse match

--color Display Color

[Email protected] ~]# grep--color Minion A.txt

8 Echo: Displays the specified string

Option:-N does not wrap, the default echo output is wrapped.

[Email protected] ~]# echo-n C

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View file contents of Linux commands