Fwd: unix tips

Get some sampled data of a very big file

awk     'BEGIN { srand(systime()); } {if (rand() < 0.3) { print $0; } }'    data.csv

qstats – quick and dirty statistics tool for the Unix pipeline | On the lambda

http://www.onthelambda.com/2013/11/05/qstats-quick-and-dirty-statistics-tool-for-the-unix-pipeline/

# Print a multiplication table.

printf "%3d %3d %3d %3d %3d %3d %3d %3d %3d %3d\n" $( echo {1..10}*{1..10}\; | bc )

Linux Shell Scripting Tutorial | Learn Linux Shell Script - LinOxide

http://linoxide.com/category/linux-shell-script/

15 Linux Cat Command Examples For File Management - LinOxide

http://linoxide.com/linux-command/13-cat-command-examples/

Unbelievable ! 30 Linux TOP Command Examples With Screenshots - LinOxide

http://linoxide.com/linux-command/linux-top-command-examples-screenshots/

Famous Awk One-Liners Explained, Part I: File Spacing, Numbering and Calculations - good coders code, great reuse

http://www.catonmat.net/blog/awk-one-liners-explained-part-one/