N1： watch date
watch -n 1 w //-d:--differences flag will highlight...
--- Procps - The / proc file system utilities.
Ex: watch -n 1 "ifconfig eth0 | grep bytes"
N2: find -type f -exec rm -i {} \;
find -type f -ok rm {} \;
find -type f | xargs rm -rf
N5: Kernel
#getconf GNU_LIBPTHREAD_VERSION
#--NPTL 2.8.90(http://linuxdevices.com/articles/AT6753699732.html)
#cat /proc/sys/kernel/threads-max // linuxthreads
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