Shell Programming and Scripting

I have created a dummy file -demo.txt

On my machine-A (oslevel-5300-08) I can display the file content in HEX format through VI editor using :%!xxd but on other machine-B (oslevel - 5300-06) , I get error as "sh: xxd: not found."

machine-A:
$ cat demo.txt
Hello World !

I can display the file content in HEX format through VI editor using :%!xxd

$ vi demo.txt
"demo.txt" 1 line, 14 characters
0000000: 4865 6c6c 6f20 576f 726c 6420 210a Hello World !.

machine-B
sh: xxd: not found.

can anyone tell me what is problem and how to fix this?

Your problem is that xxd isn't a built-in of vi(m), but an external program, which is invoked by vi(m) as a filter (that the :%! part)

Either you installed it seperately on machine-A OR it isn't in the path on machine-B OR someone accidentally deleted it on machine-B

Thanks for your reply....

definitely...these are NOT the cases...
- Either you installed it seperately on machine-A
- someone accidentally deleted it on machine-B

How can I check that?
"it isn't in the path on machine-B"

First, you should check to see if xxd exists on the machine(s) and then adjust your PATH accordingly.

How I should check if xxd exists on the machine(s)? cmd?

You can use the find command.

yep, there is diff....

$ which xxd
/@sys/nosupp/bin/xxd
==========================
# which xxd
which: 0652-141 There is no xxd in /usr/bin /etc /usr/sbin /usr/ucb /usr/bin/X11 /sbin /usr/java14/jre/bin /usr/java14/bin /usr/local/bin /bin.
==========================

so how and from I can install xxd? if you can give some details it will b gr8.