I think the answer might be execute permission. If a script has +x then you can execute just as you would execute a binary file. E.g.
Code:
user@linux: ls -l disk_space.sh
-rwxr-xr-x 1 user users 40 2009-07-21 12:49 disk_space.sh
user@linux:~> ./disk_space.sh
My script has a execute permission and I ran it like any binary file, same goes for perl scripts. But you also have to define the program which will interpret your scripts in the very first line. For Perl, it's usually, #!/usr/bin/perl or where your perl is installed. Else I'd have to use:
Code:
user@linux:sh disk_space.sh
or
user@linux:perl some_perl_script.pl
HTH,
Nitin
you are correct, the #! line tell the shell what to run the "script" under.
I have a SQL script that requires values from the environment in order to execute. I found a way to get the desired results but my process is a little choppy. Any suggestions on how to clean this up would be greatly appreciated.
SQL Script
-------------
select a, b, c
from d
where a =... (1 Reply)
I have written a script to ftp a file from Unix to an NT machine to authenticate ftp login I have added the information into the .netrc file when logged in using ftp the commands are not executed. Does anybody know how to make the command execute once username and password have been provided using... (2 Replies)
Basically, I would like to run an mpirun query on my web server to query your databases via yours when using the BLAST program, however the server seems not able to execute even basic mpirun programs such as cpi (to calculate pi). Are there any settings I should take note of?
I am running Perl... (0 Replies)
Hi, guys !
I have at home a simple network. I have a server that shares the internet connection to my computer and another another computer which is located in another room. When I want to download something, I'd like to download directly on the server, without letting my computer on. The server... (2 Replies)
Hi,
I want to run these two commands one after the other.
awk 'BEGIN {OFS="\t"} {print $2}'
sort -u
rather than typing awk 'BEGIN {OFS="\t"} {print $2}' file1 > file2, then sort -u file2 > file3. Is it possible to run both commands on file1 then get output file3?
Its kinda hard for... (5 Replies)
Hi Friends,
I have a situation here, where I have a script running in one server, namely "SERVER1". Within this script which runs in SERVER1, I have a set of commands which has to connect to a different server (namely "SERVER2") and execute the commands accordingly. I have no experience at all... (1 Reply)
I need to execute a command to run my script several times with varying parameters
perl ex.pl -b 130198 -e 130884 -c plot plot.txt 1_plot.txt
perl ex.pl -b 1345 -e 1308 -c plot plot.txt 2_plot.txt
perl ex.pl -b 1345567 -e 130898 -c plot plot.txt 3_plot.txt
.
.
.
100's of excutions
... (2 Replies)
Hi,
I am stuck into a situation where i want to execute a command in my shell script well along with a previous command in order to achieve something but i am not figuring out a way.
here is a snippet:
service management restart
rm -rf lock.file
in the above, if you see, i am trying to... (5 Replies)
Hello.
I am new in shell script. Could anyone help me?
I have un shell script. I need each command in it be sequentielly, when the first command ends the second starts. When the second ends et third starts, and so on
Thanks in adavance (1 Reply)
If you want to capture the output of any command, we then will be writing the system command in `` or qx.
`` an qx works fine with all linux and windows system commands.
But when I execute the below code.. it is displaying the output on the screen directly instead of storing to variable
... (3 Replies)
Discussion started by: giridhar276
3 Replies
LEARN ABOUT PLAN9
setuid
SETUID(1) General Commands Manual SETUID(1)NAME
setuid - run a command with a different uid.
SYNOPSIS
setuid username|uid command [ args ]
DESCRIPTION
Setuid changes user id, then executes the specified command. Unlike some versions of su(1), this program doesn't ever ask for a password
when executed with effective uid=root. This program doesn't change the environment; it only changes the uid and then uses execvp() to find
the command in the path, and execute it. (If the command is a script, execvp() passes the command name to /bin/sh for processing.)
For example,
setuid some_user $SHELL
can be used to start a shell running as another user.
Setuid is useful inside scripts that are being run by a setuid-root user -- such as a script invoked with super, so that the script can
execute some commands using the uid of the original user, instead of root. This allows unsafe commands (such as editors and pagers) to be
used in a non-root mode inside a super script. For example, an operator with permission to modify a certain protected_file could use a
super command that simply does:
cp protected_file temp_file
setuid $ORIG_USER ${EDITOR:-/bin/vi} temp_file
cp temp_file protected_file
(Note: don't use this example directly. If the temp_file can somehow be replaced by another user, as might be the case if it's kept in a
temporary directory, there will be a race condition in the time between editing the temporary file and copying it back to the protected
file.)
AUTHOR
Will Deich
local SETUID(1)
07-23-2009
