02-20-2001
That is a function of the shell and the command line editor you are working in/with. I work in KSH so I set my EDITOR environmental variable to <B>vi</B> and have the entire range of vi search and replace on the command line. This is the same as all the vi commands in a file. For example, to move forward a line: <ESC>j ; backwards: <ESC> k. To search for a command: <ESC>/string . This is very powerful and fast (much more powerful than DOS, BTW).
Other use EMACS as the command line editor.
Also, differnet shells have builtins that do not require using a command line editor. For me, I could not imagine not using vi or emacs on the command line. The power is amazing.
10 More Discussions You Might Find Interesting
1. Shell Programming and Scripting
Just a super quick question:
how do you put a link in your php code.
I want to make a link to something in /tmp directory.
i.e. how do you put a href into php, I think it's done a bit differently.
thanks
john (1 Reply)
Discussion started by: jmg5
1 Replies
2. UNIX for Dummies Questions & Answers
Hello There!
I am trying to write this SIMPLE script in Bourne Shell but I keep on getting syntax errors. Can you see what I am doing wrong? I've done this before but I don't see the difference. I am simply trying to take the day of the week from our system and when the teachers sign on I want... (7 Replies)
Discussion started by: catbad
7 Replies
3. UNIX for Dummies Questions & Answers
Hi guys
sed -e "s/$<//g"
the $< can allow me to assign an input value to the variable right?
do the double quotes check the previous context? (1 Reply)
Discussion started by: hamoudzz
1 Replies
4. Shell Programming and Scripting
does anyone know what $? means? i echoed it on my box (running AIX Korn shell) and got 127 (2 Replies)
Discussion started by: penfold
2 Replies
5. UNIX for Dummies Questions & Answers
Hi, I am new to UNIX, and am learning from this tutorial : http://www.ee.surrey.ac.uk/Teaching/Unix/index.html
It keeps telling me to files downloaded from the internet (like .txt files) to the directory, and I dont know how to.
How do I add .txt files to my directory? Thanks. (6 Replies)
Discussion started by: IAMTHEEVILBEAN
6 Replies
6. UNIX for Dummies Questions & Answers
Hi,
Is there a simple way, using ksh, to find the byte position in a file that a stated character appears?
Many thanks
Helen (2 Replies)
Discussion started by: Bab00shka
2 Replies
7. UNIX for Dummies Questions & Answers
from command prompt I did grep two words on a same line for eg: grep abc | grep xyz and I got tht particular line, but I want to know when I vi that file how to directly search for that particular line? I appreciate if any one can provide answer, thanks in advance (2 Replies)
Discussion started by: pkolishetty
2 Replies
8. UNIX for Dummies Questions & Answers
Hello all,
Quick question from a fairly new to Unix developer.
if
then
completedLogFile=$logfile.$(date +%Y%m%d-%H:%M:%S)
mv $logfile $completedLogFile
fi
I understand that this portion of code is simply copying a tmp logfile to a completed logfile when a condition is true. The... (2 Replies)
Discussion started by: JohnnyBoy
2 Replies
9. UNIX for Dummies Questions & Answers
I'd like to list all userid's on the system that have a .bashrc file in their home directory with a command like "cat /etc/passwd | grep -f", however I'm not quite familiar with using grep. Any suggestions? (2 Replies)
Discussion started by: raidkridley
2 Replies
10. Shell Programming and Scripting
When I have a file like this:
0084AF aj-123-a NAME Ajay NAME Kumar Engineer
015ED6 ck-345-c
020B25 ef-456-e
027458 pq-890-p NAME Peter NAME Salob Doctor
0318F0 xy-123-x NAME Xavier Arul NAME Yesu Supervisor
0344CA de-456-d
where - The first NAME is followed by... (6 Replies)
Discussion started by: ajay41aj
6 Replies
LEARN ABOUT OPENSOLARIS
rehash
hash(1) User Commands hash(1)
NAME
hash, rehash, unhash, hashstat - evaluate the internal hash table of the contents of directories
SYNOPSIS
/usr/bin/hash [utility]
/usr/bin/hash [-r]
sh
hash [-r] [name]...
csh
rehash
unhash
hashstat
ksh
hash [name]...
hash [-r]
DESCRIPTION
/usr/bin/hash
The /usr/bin/hash utility affects the way the current shell environment remembers the locations of utilities found. Depending on the argu-
ments specified, it adds utility locations to its list of remembered locations or it purges the contents of the list. When no arguments are
specified, it reports on the contents of the list. The -r option causes the shell to forget all remembered locations.
Utilities provided as built-ins to the shell are not reported by hash.
sh
For each name, the location in the search path of the command specified by name is determined and remembered by the shell. The -r option to
the hash built-in causes the shell to forget all remembered locations. If no arguments are given, hash provides information about remem-
bered commands. The Hits column of output is the number of times a command has been invoked by the shell process. The Cost column of output
is a measure of the work required to locate a command in the search path. If a command is found in a "relative" directory in the search
path, after changing to that directory, the stored location of that command is recalculated. Commands for which this will be done are indi-
cated by an asterisk (*) adjacent to the Hits information. Cost will be incremented when the recalculation is done.
csh
rehash recomputes the internal hash table of the contents of directories listed in the path environmental variable to account for new com-
mands added.
unhash disables the internal hash table.
hashstat prints a statistics line indicating how effective the internal hash table has been at locating commands (and avoiding execs). An
exec is attempted for each component of the path where the hash function indicates a possible hit and in each component that does not begin
with a '/'.
ksh
For each name, the location in the search path of the command specified by name is determined and remembered by the shell. The -r option to
the hash built-in causes the shell to forget all remembered locations. If no arguments are given, hash provides information about remem-
bered commands.
OPERANDS
The following operand is supported by hash:
utility The name of a utility to be searched for and added to the list of remembered locations.
OUTPUT
The standard output of hash is used when no arguments are specified. Its format is unspecified, but includes the pathname of each utility
in the list of remembered locations for the current shell environment. This list consists of those utilities named in previous hash invoca-
tions that have been invoked, and may contain those invoked and found through the normal command search process.
ENVIRONMENT VARIABLES
See environ(5) for descriptions of the following environment variables that affect the execution of hash: LANG, LC_ALL, LC_CTYPE, LC_MES-
SAGES, and NLSPATH.
PATH Determine the location of utility.
EXIT STATUS
The following exit values are returned by hash:
0 Successful completion.
>0 An error occurred.
ATTRIBUTES
See attributes(5) for descriptions of the following attributes:
+-----------------------------+-----------------------------+
| ATTRIBUTE TYPE | ATTRIBUTE VALUE |
+-----------------------------+-----------------------------+
|Availability |SUNWcsu |
+-----------------------------+-----------------------------+
|Interface Stability |Standard |
+-----------------------------+-----------------------------+
SEE ALSO
csh(1), ksh(1), sh(1), attributes(5), environ(5), standards(5)
SunOS 5.11 17 Jul 2002 hash(1)