[wget, grep, nano, ps, ssh] Top 5 Commands

Source: [Youtube] Nixie Pixel: Top 5 Command Line Essentials - BASH Basics

5. wget

download files

1wget -O filename http://url.com

-O is for --output-document. This flag let’s you specify the file to which save in/as. an output document

-O file
--output-document=file

Use of -O is not intended to mean simply “use the name file instead of the one in the URL;” rather, it is analogous to shell redirection: wget -O file http://foo is intended to work like wget -O - http://foo > file; file will be truncated immediately, and all downloaded content will be written there.

-c is for --continue

Continue getting a partially-downloaded file. This is useful when you want to finish up a download started by a previous instance of Wget, or by another program. For instance:

1wget -c ftp://sunsite.doc.ic.ac.uk/ls-lR.Z

4. grep

find text or patterns within files

1grep -i -R towel 

grep everything on your computer for towel.

-i is for --ignore-case, case insenitive search -r is for --recursive, read all files under each directory recursively -R is for --dereference-recursive, read all files under each directory recursively and follow symlinks too, unlike -r which only follows suymlinks if they are on the command line.

3. nano

editor - simple yet versatile

nano is installed by default in most distros. and it is WYSIWIG, unlike Vim.

2. ps

process status, good for power users

1ps aux

OR

ps -aux

sort by cpu usage:

ps -aux k%cpu

find how much resources a program is using by piping the result to grep

1ps -aux | grep chromium

kill a program

kill -9 pid 

1. shh

secure login to virtual location

1ssh nixie@home.nixiepixel.com -D 8080