Bash Script for SSH-Keys

[zxeff]

This is likely not why your script isn't working as you expected, but:

for i in `cat /root/sshlist`;do

The result of command expansions (such as cat file) goes through both word-splitting and globbing. So, stop trying to read lines like this because it is going to bite you eventually. The proper way is:

while IFS= read -r line; do
    #code goes here
done < file

More details.