passwd
man cp
apropos "copy"
help cd
whatis man
type man
info
control d / exit
cp file newname
history

absolute cp /home/blabla /home/baba
realtive cp f1 d1/f2
./ current ../a father
pwd (print working directory)
mkdir namme (crear)
rmdir (borrar)
mv source target
rm
mount
df
quota -v
du / du -a

echo hello f1 (archivo f1 que pone hello)
--- [owner] --- [group owner] --- [others]

chmod (change permissions) u-w c1
ls -l para ver los permisos
chmod u-w .
u g o +- r w x
chmod o + r f (file)
chmod 764
si eres owner y teacher se mira siempre owner primero
only the owner can change
rm a*f todas q empiezan por a y acaban por f
?a* all the files who has a as a second character
[ab]? all the files that begin with a or b
[!ab] all the characters but a and b