I'm trying to get GNU screen to show the output of "uptime" for the host being accessed in the current window, but unfortunately, no matter what window I go in, it shows the uptime for the host I originally launched screen in ("adminhost").
Does anyone know how to get this to update from the... (0 Replies)
For example:
I got a list of file end at .txt. I want all of them do the same command like
grep '^@' and attached it to a output .sh file.
This is the command I type:
ls *.txt | awk '{print "grep \' \^\@\' ",$1}' > txt.sh
My desired output is when I type the command "more txt.sh "
The... (4 Replies)
Hi - Within perl I want to execute a system command. I want to re-direct all the output from the command to a file (@result = `$cmd`;), but I ALSO want the results to be displayed on the screen (system("$cmd");
The reason is this - if the command completes, I want to process the output. If the... (6 Replies)
When trying to use backticks for system commands, is there a way to read the error messages if a command doesn't execute properly?
I have no problem getting the results if the command is properly executed.
Ex.
my @result = `dir`;
foreach my $line (@result) {
print "Result = $line";... (2 Replies)
It's been covered in lots of places, and I have banged on it for about an hour and I am not making any headway on this particular string.
A weather-related web page I want to monitor has text on the screen, but it changes. Right now, the page has "None issued by this office recently." but in 2... (4 Replies)
Hello,
Can't we use backtick operator inside awk.
nawk '
BEGIN {
RS=""; FS="\</input\>"
}
{
for(i=1;i<=NF;i++) {
if ($i~/\"\"/) {
print `grep XYZ $i`;
print $i
}
}
}
' test
In the following code, I need to print $i and some... (8 Replies)
Discussion started by: shekhar2010us
8 Replies
LEARN ABOUT LINUX
rbash
RBASH(1) General Commands Manual RBASH(1)NAME
rbash - restricted bash, see bash(1)RESTRICTED SHELL
If bash is started with the name rbash, or the -r option is supplied at invocation, the shell becomes restricted. A restricted shell is
used to set up an environment more controlled than the standard shell. It behaves identically to bash with the exception that the follow-
ing are disallowed or not performed:
o changing directories with cd
o setting or unsetting the values of SHELL, PATH, ENV, or BASH_ENV
o specifying command names containing /
o specifying a file name containing a / as an argument to the . builtin command
o specifying a filename containing a slash as an argument to the -p option to the hash builtin command
o importing function definitions from the shell environment at startup
o parsing the value of SHELLOPTS from the shell environment at startup
o redirecting output using the >, >|, <>, >&, &>, and >> redirection operators
o using the exec builtin command to replace the shell with another command
o adding or deleting builtin commands with the -f and -d options to the enable builtin command
o using the enable builtin command to enable disabled shell builtins
o specifying the -p option to the command builtin command
o turning off restricted mode with set +r or set +o restricted.
These restrictions are enforced after any startup files are read.
When a command that is found to be a shell script is executed, rbash turns off any restrictions in the shell spawned to execute the script.
SEE ALSO bash(1)GNU Bash-4.0 2004 Apr 20 RBASH(1)