pdsh gives error "rcmd: socket: Permission denied"
Solution 1:
Found the answer. rcmd_default needs an entry:
echo "ssh" > /etc/pdsh/rcmd_default
Solution 2:
You can use PDSH_RCMD_TYPE=ssh like:
PDSH_RCMD_TYPE=ssh pdsh -w host1,host2 tail -f /var/log/apache.log
Solution 3:
On Fedora 23 to get this working I had to:
Install pdsh-rcmd-ssh which makes SSH an available rcmd module
dnf install pdsh-rcmd-ssh
Export the following variable
export PDSH_RCMD_TYPE=ssh