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easy C shell math calculators
allows simple C shell access to the power of bc - never could figure out how to do the same thing with Bash - that's why I use tcsh most of the time.

Extract tarball from internet without local saving

Print a file to a LPD server
You don't need cups =)

Save history without logout
You can use commands that executed on first console from new opened second console. Sometimes it be very useful :)

which process is accessing the CDROM

Check whether IPv6 is enabled
Checks whether IPv6 is enabled system-wide by reading from procfs.

Convert any sequence of spaces/tabs to single space/tab
Remove empty lines additionally: $ tr -s ' \t\n' 2.txt identical with: $ tr -s '[:space:]' 2.txt To "clean perfectly" a text or code file, You can combine this command with another one: $ while read l; do echo -e "$l"; done 2.txt (= remove all leading and trailing spaces or tabs from all lines of a text file)

Display kernel profile of currently executing functions in Solaris.
Lockstat will sample the kernel 977 times per second, and print out the functions that it sees executing on the CPU during the sample. The -s 10 switch tells lockstsat to not only print that function, but also show the call stack (up to 10 deep).

Monitor memory usage
Monitor with watch command and vmstat, memory usage

Calculate days on which Friday the 13th occurs (inspired from the work of the user justsomeguy)
Friday is the 5th day of the week, monday is the 1st. Output may be affected by locale.


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