On Thu, 19 Sep 2013 19:36:43 +0000, william benton wrote: > when I log into free bsd I am in the sh shell. i type history > at the command line and the machine says history not found. > If I type h at the command line it works like i expect the > history command to work.
That is strange. The sh shell (system scripting shell and emergency dialog shell in SUM) does not have a history function. % sh $ h h: not found $ history history: not found $ _ > In the csh or tcsh shells history works as well as h. This is correct. A system-wide alias is defined for those shells: alias h 'history 25' It can be found in /etc/csh.cshrc. > why does entering history at the command line work in the csh and > tcsh shells but not in the sh shell. The sh shell (Bourne-like shell, actually a derivate of ash) does not have this functionality. Bash, the Bourne-again shell, supports the "history" function internally, and a "h" alias can be defined for this shell. % bash $ history [...] 501 history $ _ > Considering that all three shells seem to have the same .cshrc file? They don't. The csh and tcsh (system default dialog shell) use the cshrc mechanism (/etc/csh.cshrc for global settings, .cshrc for user settings, and .login and .logout for interactive shells), while sh uses /etc/profile and .profile and .shrc similarly. Bash uses .profile as well as .bash_profile and .bash_login in a comparable manner. -- Polytropon Magdeburg, Germany Happy FreeBSD user since 4.0 Andra moi ennepe, Mousa, ... _______________________________________________ email@example.com mailing list http://lists.freebsd.org/mailman/listinfo/freebsd-questions To unsubscribe, send any mail to "freebsd-questions-unsubscr...@freebsd.org"