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Take a look at linuxcommand.org website, it's got what you're asking for (I think) and lots of more. If I understand you right, you need a loop (like FOR for example, or whatever you prefer) and then use (again -- for example) touch to create the files and depending on what you want to do with them, use > or >> to write data into the files (for example; > overwrites existing data and >> appends to the file; it's explained in the website I mentioned).
while [$index -lt $NPROCS]; do
echo file $(index) > Rank_$(index).out
It can't pass compilation, what's wrong with it??
1. You don't compile a shell script.
2. "index" is not a command (unless you have created one). Or did you mean to initialize index as a variable (which you haven't done anywhere)?
3. You need spaces around [ and ].
4. You are using command substitution instead of variable expansion.
5. You haven't incremented index.
It should be:
while [ $index -lt $NPROCS ]; do
echo "file $index" > Rank_$index.out
index=$(( $index + 1 ))