How to list and view files in Linux

ls -> list/displays contents of a directory.

cat -> displays (concatenate) the contents of a text file to the screen.

head-> views first few lines of a file. The defaut number of lines is 10.

tail -> views the last few lines of a file.

more -> view the file page by page.

less -> view the file page by page but you can use the up-down keys.

grep -> global regular expression print, Displays lines in a text file mathcing a given regexp.

file -> determines the file type of a file.