The first chapter, Linux common commands

20161124 Linux Common commands

1. Find

find/etc/-size +50k-ls

find/etc/-size +50k-ls 2>/dev/null

View files larger than 50K in the directory and display them with the LS list,

Understand the meaning of 2>/dev/null and hide all the rights


2, pwd, LS, ls-a, Ls-al,, Ls-alh,touch, make,

Common Ls-alh


3. Standard input and output piping

Cat > 1127.www.qixoo.qixoo.com/packages1.txt After entering content, press Enter,ctrl+d to save exit

Cat 1.txt > 2.txt (Overlay)

Cat 1.txt >> 2.txt (Append)

4, pipe character |

Use the piping technique to extract the cat commands from the experiment and save them in a file named CAT1:
History | grep cat > CAT1

Cat CAT1 View

The first chapter, Linux common commands