BASH SCRIPT: How can you append the hostname and date and the output of a command to a log file in order it all reads on one line in a log file

How do you append the output value of a command  that is run plus the value of other variables to a log file in a bash script?
This is what I have just now

#!/bin/bash
host=$(hostname)
date=$(date '+%d%m%Y:%H%M)
log="installlogfile.txt"
runbinary  2>&1 | tee -a ${installlogfile.txt}  <- instead of this i want to be able to append also ${date} and ${host} to the installlogfile.txt but tee -a with multiple variables doesn't work. Any ideas on how to do this in bash would be much appreciated. If i echo or print the variables before i run the command there would be newline characters and I would like the output in the log file to be $(hostname) ${date} output from the command.
lolaferrariAsked:
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Pierre FrançoisSenior consultantCommented:
If you want to have the hostname and the date inside of the file, code it like this:

#!/bin/bash
host=$(hostname)
date=$(date '+%d%m%Y:%H%M)
log="installlogfile.txt"
{echo -n "$host $date "; runbinary  2>&1} | tee -a $log

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lolaferrariAuthor Commented:
Merci Beaucoup !
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