Using cat requires a pipe, and this requires the loop to 1. run in a sub shell and 2. read from stdin (descriptor 1, default).
1. A subshell is more overhead, and you cannot modify shell variables in the main shell.
2. rsh (and ssh) read from stdin, that competes with a read from stdin. Work-arounds are: rsh -n ... or rsh </dev/null ...
I think reboot does not take arguments like now, is misleading at least.
Because the connection might be dropped before the command finishes, it is safer to run it in the background wirh a little delay.
This User Gave Thanks to MadeInGermany For This Post:
Hi ,
reading a "file1" with 2 data in each line (VAR1 and VAR2) , i'm using a while loop like this :
cat file1|awk '{print $1,$2}'|while read VAR1 VA2
do
echo $VAR1
echo $VAR2
done
as this example shows , it works but if between do and done i use
a "rsh" command , the script reads... (6 Replies)
hi
I wanted to use the for loop structure in tandem with rsh command and the result to be redirected into a local .lst file within a shell script .
Tried the following but does not help :confused: .
rsh ABCD "cd /bosp/local/home/linus/;for i in `ls -ltr | grep ^- | awk {'print $9'}`
do... (4 Replies)
Hi all
I have a while read loop that I use to process a file line by line. The reason I am using this is due the fact that I have spaces in the line and a for loop treats the space as a delimeter for the next record.
In this while loop I have a rsh. It appears that cos of the rsh, I never get... (1 Reply)
Hey all
I have two scripts, one script containing the guts of my code.
The other simply loops through a list, calling the other script on each iteration.
Problem is when I add the line
`/usr/bin/rsh -l root $HOSTNAME ""`
to my main script, the loop never seems to exectute any more... (1 Reply)
hi everyone,
I have the following problem: the foreach loop inside rsh doesn'work.
I have tried the for command but it's not recognized. with the foreach command I don't receive any error, but it doesn't really make the cycle, ignoring the foreach and executing 1 time the echo command. Anyone has... (5 Replies)
Oh, how I regret having chosen Solaris...
Really, when I had my last Solaris system ten years ago I was just happy. Like a tank: Slow, clumsy, ugly but rock-solid. Then there were 10 ten years of FreeBSD and OpenBSD. Simple install, fast, nice, good package managing, just running along.
But... (11 Replies)
So I was patching a Solaris 10 U08 X86 X2200 box in preparation for an Oracle upgrade. Rebooted the box because the patches failed and the box will not boot successfully. I need to back up the zones on the 2 drives before going further. I pulled the drives and attempted to mount them on my Ubuntu... (0 Replies)
Hello folks,
I've a (perhaps) simple question.
In a text file I've :
server_name1: directory1
server_name2: directory2
server_name3: directory3
I want to make a loop that lets me connect and operate on every server:
rsh server_name1 "ls -l directory1"
I've tried with awk,... (6 Replies)
Discussion started by: gogol_bordello
6 Replies
LEARN ABOUT SUNOS
rsh
rsh(1M) System Administration Commands rsh(1M)NAME
rsh, restricted_shell - restricted shell command interpreter
SYNOPSIS
/usr/lib/rsh [-acefhiknprstuvx] [argument...]
DESCRIPTION
rsh is a limiting version of the standard command interpreter sh, used to restrict logins to execution environments whose capabilities are
more controlled than those of sh (see sh(1) for complete description and usage).
When the shell is invoked, it scans the environment for the value of the environmental variable, SHELL. If it is found and rsh is the file
name part of its value, the shell becomes a restricted shell.
The actions of rsh are identical to those of sh, except that the following are disallowed:
o changing directory (see cd(1)),
o setting the value of $PATH,
o pecifying path or command names containing /,
o redirecting output (> and >>).
The restrictions above are enforced after .profile is interpreted.
A restricted shell can be invoked in one of the following ways:
1. rsh is the file name part of the last entry in the /etc/passwd file (see passwd(4));
2. the environment variable SHELL exists and rsh is the file name part of its value; the environment variable SHELL needs to be set in the
.login file;
3. the shell is invoked and rsh is the file name part of argument 0;
4. the shell is invoke with the -r option.
When a command to be executed is found to be a shell procedure, rsh invokes sh to execute it. Thus, it is possible to provide to the end-
user shell procedures that have access to the full power of the standard shell, while imposing a limited menu of commands; this scheme
assumes that the end-user does not have write and execute permissions in the same directory.
The net effect of these rules is that the writer of the .profile (see profile(4)) has complete control over user actions by performing
guaranteed setup actions and leaving the user in an appropriate directory (probably not the login directory).
The system administrator often sets up a directory of commands (that is, /usr/rbin) that can be safely invoked by a restricted shell. Some
systems also provide a restricted editor, red.
EXIT STATUS
Errors detected by the shell, such as syntax errors, cause the shell to return a non-zero exit status. If the shell is being used non-
interactively execution of the shell file is abandoned. Otherwise, the shell returns the exit status of the last command executed.
ATTRIBUTES
See attributes(5) for descriptions of the following attributes:
+-----------------------------+-----------------------------+
| ATTRIBUTE TYPE | ATTRIBUTE VALUE |
+-----------------------------+-----------------------------+
|Availability |SUNWcsu |
+-----------------------------+-----------------------------+
SEE ALSO intro(1), cd(1), login(1), rsh(1), sh(1), exec(2), passwd(4), profile(4), attributes(5)NOTES
The restricted shell, /usr/lib/rsh, should not be confused with the remote shell, /usr/bin/rsh, which is documented in rsh(1).
SunOS 5.10 1 Nov 1993 rsh(1M)