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In future posts please mention that you are on a MAC and the version of MACOS. If not you may get solutions which do not run on your computer.



The MSDOS pipeline is pretty much the same as the...

What Operating System are you running?
What Shell are you using?

Scrutinizer has quite correctly posted code using the unix "diff" program which is common to all unix versions.
The "diff"...

In bash/ksh93:
diff <(ls -l) <(ls -le)

Why use grep? It may give a lot more than the value of IFS:


$ set | grep IFS
DIFS=$' \t\n'
IFS=$' \t\n'
oldIFS=$' \t\n'
oldIFS=$IFS;
IFS=" -./";
IFS=$oldIFS;
IFS=:;
...

u can debug unix scripts using ksh -vx <filename> , using echo statements and creating log files

1. You could use debuggers to debug a script - there are some available
2. If you are trying to understand a script then this is not debugging it - unless someone created it correctly (indentation,...