rsh.tproj/rsh.1

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  32 .\"     @(#)rsh.1       8.1 (Berkeley) 6/6/93
  33 .\" $FreeBSD: src/usr.bin/rsh/rsh.1,v 1.17 2002/04/20 12:16:41 charnier Exp $
  34 .\"
  35 .Dd June 6, 1993
  36 .Dt RSH 1
  37 .Os
  38 .Sh NAME
  39 .Nm rsh
  40 .Nd remote shell
  41 .Sh SYNOPSIS
  42 .Nm
  43 .Op Fl 46Kdnx
  44 .Op Fl t Ar timeout
  45 .Op Fl k Ar realm
  46 .Op Fl l Ar username
  47 .Ar host
  48 .Op command
  49 .Sh DESCRIPTION
  50 The
  51 .Nm
  52 utility executes
  53 .Ar command
  54 on
  55 .Ar host .
  56 .Pp
  57 The
  58 .Nm
  59 utility copies its standard input to the remote command, the standard
  60 output of the remote command to its standard output, and the
  61 standard error of the remote command to its standard error.
  62 Interrupt, quit and terminate signals are propagated to the remote
  63 command;
  64 .Nm
  65 normally terminates when the remote command does.
  66 The options are as follows:
  67 .Bl -tag -width flag
  68 .It Fl 4
  69 Use IPv4 addresses only.
  70 .It Fl 6
  71 Use IPv6 addresses only.
  72 .It Fl d
  73 Turn on socket debugging (using
  74 .Xr setsockopt 2 )
  75 on the
  76 .Tn TCP
  77 sockets used for communication with the remote host.
  78 .It Fl l Ar username
  79 Allow the remote
  80 .Ar username
  81 to be specified.
  82 By default, the remote username is the same as the local username.
  83 .It Fl n
  84 Redirect input from the special device
  85 .Pa /dev/null
  86 (see the
  87 .Sx BUGS
  88 section of this manual page).
  89 .It Fl x
  90 Turn on
  91 .Tn DES
  92 encryption for all data exchange.
  93 This may introduce a significant delay in response time.
  94 .It Fl t Ar timeout
  95 Allow a
  96 .Ar timeout
  97 to be specified (in seconds).  If no
  98 data is sent or received in this time,
  99 .Nm
 100 will exit.
 101 .El
 102 .Pp
 103 If no
 104 .Ar command
 105 is specified, you will be logged in on the remote host using
 106 .Xr rlogin 1 .
 107 .Pp
 108 Shell metacharacters which are not quoted are interpreted on local machine,
 109 while quoted metacharacters are interpreted on the remote machine.
 110 For example, the command
 111 .Pp
 112 .Dl rsh otherhost cat remotefile >> localfile
 113 .Pp
 114 appends the remote file
 115 .Ar remotefile
 116 to the local file
 117 .Ar localfile ,
 118 while
 119 .Pp
 120 .Dl rsh otherhost cat remotefile \&">>\&" other_remotefile
 121 .Pp
 122 appends
 123 .Ar remotefile
 124 to
 125 .Ar other_remotefile .
 126 .\" .Pp
 127 .\" Many sites specify a large number of host names as commands in the
 128 .\" directory /usr/hosts.
 129 .\" If this directory is included in your search path, you can use the
 130 .\" shorthand ``host command'' for the longer form ``rsh host command''.
 131 .Sh FILES
 132 .Bl -tag -width /etc/hosts -compact
 133 .It Pa /etc/hosts
 134 .It Pa /etc/auth.conf
 135 .El
 136 .Sh SEE ALSO
 137 .Xr rlogin 1 ,
 138 .Xr setsockopt 2 ,
 139 .Xr kerberos 3 ,
 140 .Xr krb_realmofhost 3 ,
 141 .Xr krb_sendauth 3 ,
 142 .Xr rcmd 3 ,
 143 .Xr ruserok 3 ,
 144 .Xr auth.conf 5 ,
 145 .Xr hosts 5 ,
 146 .Xr hosts.equiv 5 ,
 147 .Xr rlogind 8 ,
 148 .Xr rshd 8
 149 .Sh HISTORY
 150 The
 151 .Nm
 152 command appeared in
 153 .Bx 4.2 .
 154 .Sh BUGS
 155 If you are using
 156 .Xr csh  1
 157 and put a
 158 .Nm
 159 in the background without redirecting its input away from the terminal,
 160 it will block even if no reads are posted by the remote command.
 161 If no input is desired you should redirect the input of
 162 .Nm
 163 to
 164 .Pa /dev/null
 165 using the
 166 .Fl n
 167 option.
 168 .Pp
 169 You cannot run an interactive command
 170 (like
 171 .Xr rogue 6
 172 or
 173 .Xr vi 1 )
 174 using
 175 .Nm ;
 176 use
 177 .Xr rlogin 1
 178 instead.
 179 .Pp
 180 Stop signals stop the local
 181 .Nm
 182 process only; this is arguably wrong, but currently hard to fix for reasons
 183 too complicated to explain here.