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Another awk approach:
awk 'NR==FNR{A[$1]=$2; next} $1=="value" && $2 in A{f=A[$2]} $1=="password-encrypted" && f {$2=f; f=x} FNR>1{printf "<%s",$0}' file2 RS=\< FS=\> OFS=\> file1

More readable:...

Hello KDDubai333,

It is working fine for me and I have tested with different examples too.


awk -vs1="<password-encrypted>" -vs2="</password-encrypted>" 'NR==FNR{a[$1]=$2;next} (v in...

awk 'NR == FNR{split($0, t, /[$][$][$]/); a[t[1]] = t[2]; next} /<value>/ {split($0, t, />|</); v=t[3]} /<password-encrypted>/ {sub(/>.*<\//, ">" a[v] "</")}1' passwd file

for the modified passwd...