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rebootserver.sh
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rebootserver.sh
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#!/bin/bash
if [ $# -lt 1 ]
then
echo 'Error: Missing command option' >&2
exit 1
fi
if [ $1 = reboot ]
then
if [ $# -eq 1 ]
then
echo 'Error: Please enter target server number, * for all' >&2
exit 1
elif [ $# -eq 2 ]
then
if [ $2 = '*' ]
then
while IFS= read -r server <&3; do
ssh $server shutdown -r now
done 3<./list_of_servers.txt
exit 0
else
re='^[0-9]+$'
if [[ ! $2 =~ $re ]]
then
echo "Error: Please enter a number" >&2
exit 1
fi
count=0
while IFS= read -r server <&3; do
if [ $count -eq $2 ]
then
ssh $server shutdown -r now
exit 0
fi
count=$count+1
done 3<./list_of_servers.txt
echo "Error: The number $2 does not correspond to any server"
exit 1
fi
else
c=0
for arg in "$@"
do
if [[ $c >= 2 ]]
then
re='^[0-9]+$'
if [[ ! $arg =~ $re ]]
then
echo "Error: $arg is not a number" >&2
else
count=0
while IFS= read -r server <&3; do
if [ $count -eq arg ]
then
ssh $server shutdown -r now
exit 0
fi
count=$count+1
done 3<./list_of_servers.txt
fi
fi
c=$c+1
done
fi
elif [ $1 = status ]
then
count=0
while IFS= read -r server <&3; do
ping -c 3 $server > /dev/null 2>&1
if [ $? -ne 0 ]
then
echo "$count $server alive"
else
echo "$count $server dead"
fi
count=$count+1
done 3<./list_of_servers.txt
else
echo "Error: Unrecognized option $1" >&2
fi