ls - list contents of directories
ls [ name1 [ name2 ... ]]
For each directory named,
lists information for each file in that directory. For each file
lists information for that file. If
lists the contents of the root directory. When the command has no arguments,
lists the contents of the working directory.
information includes read/write/execute permissions, potential size,
actual size, byte count and filename. The permission are indicated as
Potential size specifies the number of 512 byte blocks allocated,
while actual size and byte count specify how many blocks and bytes are
if the file is readable;
if the file is writable;
if the file executable;
if the permission is not set.