Update remote /etc/hosts file using sudo

Sudo example

printf 'IP\tHost\n' | ssh -q host "sudo su - root -c 'cat - >> /etc/hosts'"

Debug bash scripts

Place the below lines near the top of the script.
Call debuggerIt in the script from a point where debugging should take place or at the start of the script execution.


OUTBASE="/tmp/${USER}/${0##*/}.log"

#-------------------------------------------
debuggerIt()
{
        test -d ${OUTBASE} || mkdir -p ${OUTBASE}
        exec 5> ${OUTBASE}/${0##*/}.debug
        BASH_XTRACEFD="5"
        PS4='$LINENO: '
        set -x
}
#-------------------------------------------

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more functions

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start of execution.

debuggerIt

more commands

Remote tar

Copy a files from remote location using a file list.

ssh host "cat fileList | xargs tar cf -" | tar xvf -