2016.7.25

2016.7.25

learning the bash shell

　　　stack　【stæk】　

1. a usually neat pile: a group of things that are put one top of the other
   - she took a magazine from near the top of the stack.
2. a large amount of something
   - there is a stack of evidence against her.
   - they have a stack of money.
3. a tall chimney on a factory, ship ,etc, for carrying smoke away: smokestack
4. the stack: the rows of shelves where books are stored in a library.
   - i can't find the book in the stacks.

　　　compress　【kəmˈprɛs】

1. to press or squeeze something so that it is smaller or fills less space
   - compress the air in a closed chamber
2. to make something shorter or smaller
   - the author compressed 80 years of history into 15 pages.
3. computers: to reduce the size of a computer file by using special software.
   - compress a digital photograph