Shell Programming and Scripting

function abc() {

export a=$1
export b=$2
export c="$3"
export d="$4"

#servers
Servers=$(echo server40{1..3}p.s.com)

for host in ${Servers};
do

#server login
ssh $host /bin/bash <<\EOF

echo $a a
echo $b b
echo $c c
echo $d d

EOF
done
}

#functioncall
abc 34 56 xxxx yyyy;

ssh $host "$a $b $c $d" /bin/bash <<\EOF

aa=$1
bb=$2
cc=$3
dd=$4

echo $aa aa
echo $bb bb
echo $cc cc
echo $dd dd

EOF

bash: 3: command not found
bash: 3: command not found
bash: 3: command not found

Servers="$(echo server40{1..3}p.s.com)"

echo "..." > cmdfile
for host in $Servers; do
    scp cmdfile $host;
    ssh $host ". cmdfile; rm ~/cmdfile"
done

...
a=$1 ; b=$2; 
varFile=~/.ssh/environment
[[ -f $varFile ]] && cp ${varFile}{,.orig} #backup if exists
cat > $varFile <<EOF
a=$a
b=$b
EOF

ssh host

[[ -f ${varFile}.orig ]] && mv ${varFile}{.orig,} #revert if necessary

TEST=abc
ssh somehost bash <<EOF
> echo $TEST test
> EOF
abc test