find * -name myfile -printor
find * -name "*.tex" -printto find files larger than n*512 bytes type
find * -size +n -printto find files smaller than n*512 bytes type
find * -size -n -print
tar -cvf archive.tar *.dat or tar -cvf archive.tar mydirectory/*then remove original files or directory. To compress:
gzip myfile (gunzip when uncompressing)
tar -xvf filename.tarto restore the orignal files structures. There is also
tar -tvf filename.tarto get a table of contents.