I created a script to check for tsm backup status on linux hosts. Script uses a source file to connect to each host and run a dsmc command on each host and write the output back to a output file located on the parent server where the script is running. The script works fine for the first 2 hosts including the parent and then fails with the following error.
Pseudo-terminal will not be allocated because stdin is not a terminal.
Code:
#!/bin/bash
fdate=$(date "+%Y-%m-%d")
export curr_host=`hostname`
if [ ! -s ${HOME}/hosts.txt ]
then
echo "Hosts file is missing or a zero-byte file. Exiting the process" >> log.txt
exit 1
else
echo $HOSTNAME >> tsm_bkp_$fdate.txt
dsmc q fi | awk '{print $2,$5}'|sed '0,/----/d' >> tsm_bkp_$fdate.txt
while read line
do
echo $line >> tsm_bkp_$fdate.txt
ssh -t $line dsmc q fi| awk '{print $2,$5}'|sed '0,/----/d' >> tsm_bkp_$fdate.txt
done < ${HOME}/hosts.txt
fi
I searched for the above error in other *nix forums and tried using 'ssh -tt or -T' in the script per others suggestions. But I still get the same error.
You might find it easier to write a bash script that does what you want it to do,
scp it to each of the servers, then run that script remotely with the '-C' parameter.
Here is some sample code.
Code:
for line in `cat ${HOME}/hosts.txt`
do
ssh $line -C "/home/myuser/myscript.sh"
scp $line:/home/myuser/myscript.log myscript_${line}.log
done
You should use the exec command to redirect all of the output to a log file.
Then you can copy the log file back and look at it after the script finishes
on all of the servers.
Code:
#!/bin/bash
exec >/home/myuser/myscript.log
exec 2>&1
# do some stuff
exec 1>&-
exec 2>&-
You should also look at your .bashrc and .bash_profile scripts on the third
server to see if there is anything weird going on. Finally are you running a
different OS on the third system than the first two. If that OS is older that
might explain why it doesn't work there.
This User Gave Thanks to gandolf989 For This Post:
The 3 is a file descriptor used to open the input file on, and read from. man bash:
Quote:
Redirecting Input
Redirection of input causes the file whose name results from the expansion of word to be opened for reading on file descriptor n, or the standard input (file descrip‐
tor 0) if n is not specified.
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