Android terminal

Android Terminal Emulator" by Jack Palevich)

These commands have the potential to brick your phone if used incorrectly, but at the least they can also delete important files that could make the phone useless. Make sure you know what commands you are running and how they work. And (insert disclaimer here). You Have Been Warned.
(I got most of the off of a google search, so I can't claim them as "my own.")

IMPORTANT!!!!!!
* - use with ridiculously extreme caution!

Commands Regarding Files:
ls – directory listing

ls -al – formatted listing with hidden files

cd dir - change directory to dir

cd – change to home

pwd – show current directory

mkdir dir – create a directory dir

rm file – delete file

rm -r dir – delete directory dir

rm -f file – force remove file

*rm -rf dir – force remove directory dir

cp file1 file2 – copy file1 to file2

cp -r dir1 dir2 – copy dir1 to dir2; create dir2 if it
doesn't exist

mv file1 file2 – rename or move file1 to file2
if file2 is an existing directory, moves file1 into
directory file2

ln -s file link – create symbolic link link to file

touch file – create or update file

cat > file – places standard input into file

more file – output the contents of file

head file – output the first 10 lines of file

tail file – output the last 10 lines of file

tail -f file – output the contents of file as it
grows, starting with the last 10 lines

Commands Regarding Processes:
ps – display your currently active processes

top – display all running processes

kill pid – kill process id pid

*killall proc – kill all processes named proc

bg – lists stopped or background jobs; resume a
stopped job in the background

fg – brings the most recent job to foreground

fg n – brings job n to the foreground
File Permissions

System Info:

date – show the current date and time

cal – show this month's calendar

uptime – show current uptime

w – display who is online

whoami – who you are logged in as

finger user – display information about user

uname -a – show kernel information

cat /proc/cpuinfo – cpu information

cat /proc/meminfo – memory information

man command – show the manual for command

df – show disk usage

du – show directory space usage

free – show memory and swap usage

whereis app – show possible locations of app

which app – show which app will be run by default

Networking:

ping host – ping host and output results

whois domain – get whois information for domain

dig domain – get DNS information for domain

dig -x host – reverse lookup host

wget file – download file

wget -c file – continue a stopped download

***Advanced Users:
SSH:

ssh user@host – connect to host as user

ssh -p port user@host – connect to host on port
port as user

ssh-copy-id user@host – add your key to host for
user to enable a keyed or passwordless login

I am not responsible if you completely destroy/brick your device (of any kind) as a result of any information in this post. If anything goes wrong, be ready to accept FULL responsibility. Even the un-marked (*) commands may cause harm, so be prepared and informed.

~Moto