split csv file into smaller files

gistfile1.txt

split huge-ass csv file into smaller files

$ wc -l *
   40989 IrvineCustomerData.csv

$ split -l 5000 IrvineCustomerData.csv IrvineCustomerData-

$ wc -l *
    5000 IrvineCustomerData-aa
    5000 IrvineCustomerData-ab
    5000 IrvineCustomerData-ac
    5000 IrvineCustomerData-ad
    5000 IrvineCustomerData-ae
    5000 IrvineCustomerData-af
    5000 IrvineCustomerData-ag
    5000 IrvineCustomerData-ah
     989 IrvineCustomerData-ai
   40989 IrvineCustomerData.csv
   81978 total

$ for f in IrvineCustomerData-*; do head -n 1 IrvineCustomerData.csv > $f.csv && \
    cat $f >> $f.csv && rm $f; done

$ wc -l *
    5001 IrvineCustomerData-aa.csv
    5001 IrvineCustomerData-ab.csv
    5001 IrvineCustomerData-ac.csv
    5001 IrvineCustomerData-ad.csv
    5001 IrvineCustomerData-ae.csv
    5001 IrvineCustomerData-af.csv
    5001 IrvineCustomerData-ag.csv
    5001 IrvineCustomerData-ah.csv
     990 IrvineCustomerData-ai.csv
   40989 IrvineCustomerData.csv
   81987 tota