11-04-2003
If your history file is .sh_history.
then type
> .sh_history
the content of the history file will disappear.
10 More Discussions You Might Find Interesting
1. UNIX for Advanced & Expert Users
Hi,
if someone now how can look
the last commands has used for last week? (1 Reply)
Discussion started by: Niko
1 Replies
2. Programming
Hello all,
i've written a small piece of code that will read commands from standard input and executes the commands.
Its working fine and is execting the commands well. Accepting arguments too. e.g
#mkdir <name of the directory>
The problem is that its not letting me change the directory i.e... (4 Replies)
Discussion started by: Phrozen Smoke
4 Replies
3. Programming
Helo ,
I m writing small module of c.on RHEL 4
I have one buffer (for e.g. buffer = "002"
now I want to check whethere buffer contains leading zeroes and if it contains
leading zeroes then I want to remove all leading zeroes
( i.e. if buffer = "002" then I want to make buffer = "2")
how... (1 Reply)
Discussion started by: amitpansuria
1 Replies
4. Shell Programming and Scripting
I want to log into a remote server transfer over a new config and then backup the existing config, replace with the new config.
I am not sure if I can do this with BASH scripting.
I have set up password less login by adding my public key to authorized_keys file, it works.
I am a little... (1 Reply)
Discussion started by: bash_in_my_head
1 Replies
5. Shell Programming and Scripting
Hi,
I have a log file having size of 48mb.
For such a large log file. I want to get the message in a particular format which includes only unique error and exception messages.
The following things to be done :
1) To remove all the date and time from the log file
2) To remove all the... (1 Reply)
Discussion started by: Pank10
1 Replies
6. UNIX for Dummies Questions & Answers
Hello,
I am using vi to edit file
vi filea
:e fileb
and :e# to switch between filea and fileb
Now, I'd like to have many files open at the same time and have a way to cycle between them.
:bn does not work; when I type it, nothing happens...
Is there something to add to the... (1 Reply)
Discussion started by: JCR
1 Replies
7. UNIX for Dummies Questions & Answers
I would like to remove rsh, rcp, rlogin from my production server.
How would i go about it?
Should i remove them from their original location using rm?
Will that impact on any other functionality?
---------- Post updated at 12:39 AM ---------- Previous update was at 12:16 AM ----------
... (23 Replies)
Discussion started by: pinga123
23 Replies
8. Shell Programming and Scripting
Hi Experts,
I actually need to remove multiple commas within the column not the entire row. Its comma delimited file
Actually the value seems to look like 1,006,000, when we open this in notepad or word pad the value look s like “1,006,000”
Actually our Sed command removes single comma and... (7 Replies)
Discussion started by: bshivali
7 Replies
9. AIX
Hi all,
I'm new in this forum.
I'm looking for the difference between the HACMP commands with the prefix "cl" and "cli".
The first type are under /usr/es/sbin/cluster/sbin directory and the second are under /usr/es/sbin/cluster/cspoc directory.
I know that the first are called HACMP for AIX... (0 Replies)
Discussion started by: peppix
0 Replies
10. Programming
Hello,
size_t write(int fd, const void *buf, size_t count)
{
static size_t (*write_func)(int, const void *, size_t) = NULL;
if (!write_func)
write_func = (size_t(*)(int, const void *, size_t)) dlsym(RTLD_NEXT, "write");
char tmp;
memcpy(tmp,buf,count);
... (3 Replies)
Discussion started by: chercheur857
3 Replies
LEARN ABOUT CENTOS
history
history(n) Tcl Built-In Commands history(n)
__________________________________________________________________________________________________________________________________________________
NAME
history - Manipulate the history list
SYNOPSIS
history ?option? ?arg arg ...?
_________________________________________________________________
DESCRIPTION
The history command performs one of several operations related to recently-executed commands recorded in a history list. Each of these
recorded commands is referred to as an "event". When specifying an event to the history command, the following forms may be used:
[1] A number: if positive, it refers to the event with that number (all events are numbered starting at 1). If the number is negative,
it selects an event relative to the current event (-1 refers to the previous event, -2 to the one before that, and so on). Event 0
refers to the current event.
[2] A string: selects the most recent event that matches the string. An event is considered to match the string either if the string
is the same as the first characters of the event, or if the string matches the event in the sense of the string match command.
The history command can take any of the following forms:
history
Same as history info, described below.
history add command ?exec?
Adds the command argument to the history list as a new event. If exec is specified (or abbreviated) then the command is also exe-
cuted and its result is returned. If exec is not specified then an empty string is returned as result.
history change newValue ?event?
Replaces the value recorded for an event with newValue. Event specifies the event to replace, and defaults to the current event
(not event -1). This command is intended for use in commands that implement new forms of history substitution and wish to replace
the current event (which invokes the substitution) with the command created through substitution. The return value is an empty
string.
history clear
Erase the history list. The current keep limit is retained. The history event numbers are reset.
history event ?event?
Returns the value of the event given by event. Event defaults to -1.
history info ?count?
Returns a formatted string (intended for humans to read) giving the event number and contents for each of the events in the history
list except the current event. If count is specified then only the most recent count events are returned.
history keep ?count?
This command may be used to change the size of the history list to count events. Initially, 20 events are retained in the history
list. If count is not specified, the current keep limit is returned.
history nextid
Returns the number of the next event to be recorded in the history list. It is useful for things like printing the event number in
command-line prompts.
history redo ?event?
Re-executes the command indicated by event and returns its result. Event defaults to -1. This command results in history revision:
see below for details.
HISTORY REVISION
Pre-8.0 Tcl had a complex history revision mechanism. The current mechanism is more limited, and the old history operations substitute and
words have been removed. (As a consolation, the clear operation was added.)
The history option redo results in much simpler "history revision". When this option is invoked then the most recent event is modified to
eliminate the history command and replace it with the result of the history command. If you want to redo an event without modifying his-
tory, then use the event operation to retrieve some event, and the add operation to add it to history and execute it.
KEYWORDS
event, history, record
Tcl history(n)