10-09-2012
Quote:
Originally Posted by
jethro10
does fgrep works? i tried it once...
"fgrep" is a faster variant of "grep". It uses simplified regular expressions, but this speeds up its performance considerably. For small files this will make no big difference but with large files it can save a lot of time. On the other hand "fgrep" is not as versatile as "grep", so there indeed are cases where "grep" will do the job but "fgrep" won't.
As a general rule: use "fgrep" when you can and "grep" when you must.
Corollary: the same goes for "grep" and "egrep" - at least where they are different. "egrep" can do even more than "grep", but again at the expense of speed. Its operation is even slower than that of "grep". In some systems, though, one is just a hard link to the other because the makers saved some time and effort in silently merging these two tools.
I hope this helps.
bakunin
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LEARN ABOUT OPENSOLARIS
shells
shells(4) File Formats shells(4)
NAME
shells - shell database
SYNOPSIS
/etc/shells
DESCRIPTION
The shells file contains a list of the shells on the system. Applications use this file to determine whether a shell is valid. See getuser-
shell(3C). For each shell a single line should be present, consisting of the shell's path, relative to root.
A hash mark (#) indicates the beginning of a comment; subsequent characters up to the end of the line are not interpreted by the routines
which search the file. Blank lines are also ignored.
The following default shells are used by utilities: /bin/bash, /bin/csh, /bin/jsh, /bin/ksh, /bin/ksh93, /bin/pfcsh, /bin/pfksh, /bin/pfsh,
/bin/sh, /bin/tcsh, /bin/zsh, /sbin/jsh, /sbin/sh, /usr/bin/bash, /usr/bin/csh, /usr/bin/jsh, /usr/bin/ksh, /usr/bin/ksh93, /usr/bin/pfcsh,
/usr/bin/pfksh, /usr/bin/pfsh, and /usr/bin/sh, /usr/bin/tcsh, /usr/bin/zsh, and /usr/sfw/bin/zsh. /etc/shells overrides the default list.
Invalid shells in /etc/shells could cause unexpected behavior, such as being unable to log in by way of ftp(1).
FILES
/etc/shells list of shells on system
SEE ALSO
vipw(1B), ftpd(1M), sendmail(1M), getusershell(3C), aliases(4)
SunOS 5.11 20 Nov 2007 shells(4)