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Below script worked in RedHat Enterprise Linux.


host=10.1.1.1
user=testuser
passwd=testpwd
lftp<<EOF
open sftp://$host
user $user $passwd
dir
EOF

$ cat huge_file.txt
a
a
ab
b
hh
$ cat small_file.txt
a 1.5
b 2.5
ab 7.5
cd 1.1
$ awk 'NR==FNR{buff[$1]=$0;next} {if(buff[$1]!="") print buff[$1]}' small_file.txt huge_file.txt
a 1.5
a...

Hope below example will be helpful

$ myvar=/net/lockbox/vol/homes/j564redist.tar.gz
$ dirname $myvar
/net/lockbox/vol/homes


Regards,

Jith