sswords is to read the text without displaying it on the screen. The UNIX Bourne shell does not have t... r programming to make the assumption that echo is on. In some cases, echoing of characters is done at
arison operators as well. If the file argument to one of the primaries is of the form `/dev/fd/N', the... descriptor N is checked. If the file argument to one of the primaries is one of `/dev/stdin', `/dev/stdout', or `/dev/stderr', file descriptor 0, 1, or 2... ally in the current locale.
arg1 OP arg2
OP is one of `-eq', `-ne', `-lt', `-le', `-gt', or `-ge'.