Tag Archives: differences

UNIX95 variable influences to the ps command

Setting UNIX95 to some value (it doesn’t matter what it is) changes the behavior of the ps command to use the XPG4 environment instead of the HPUX environment. You can see all the different command line options and the XPG4 behaviors by looking at the man pages (e.g. man ps). Several options like ps -o [...]

HP terms – supported vs. unsupported

In HP speak, “supported” and “works” are not synonymous. They have different meanings: Supported, known to work –> warm fuzzies all around Supported, not known to not work –> an HPite may be in trouble Supported, known to not work –> an HPite is in trouble Unsupported, known to work –> lucky today, unlucky tomorrow? [...]

Correct usage of ulimit

The “ulimit” and “limit” commands are often built into the shell, but there may exist some binaries with the same name. For example: # /usr/local/bin/bash bash> type ulimit ulimit is a shell builtin bash> which ulimit /usr/bin/ulimit

Differences between shells

Here is a comparison matrix I’ve found on www.faqs.org: sh csh ksh bash tcsh zsh rc es Job control N Y Y Y Y Y N N Aliases N Y Y Y Y Y N N Shell functions Y(1) N Y Y N Y Y Y “Sensible” Input/Output redirection Y N Y Y N Y [...]