Sponsored Content
Full Discussion: What is the meaning of $_
Top Forums Shell Programming and Scripting What is the meaning of $_ Post 302384335 by bzylg on Tuesday 5th of January 2010 12:16:54 AM
Old 01-05-2010
my bash tell me $_=clear

you can use to clear screen
 

10 More Discussions You Might Find Interesting

1. Shell Programming and Scripting

what is the meaning here?

#!/bin/sh $ORACLE_HOME/bin/sqlplus -S $orauserid/$orapasswd@$oradb << _TMP alter session set nls_date_format = 'YYYYMMDD HH24:MI'; set linesize 100 set pagesize 400 ok the above is part of a script..i just wanna know what does sqlplus -S means?? as in why we need to insert the -S behind? (2 Replies)
Discussion started by: forevercalz
2 Replies

2. AIX

meaning of ${0%${0##*/}}

. ${0%${0##*/}}Script_Name if i issue this command, it is executing the script. can any one tell what is the meaning of ${0%${0##*/}} (7 Replies)
Discussion started by: nyelavarthy
7 Replies

3. UNIX for Dummies Questions & Answers

Use and meaning of $*

Can someone explain the use and meaning of "$*" expression. (2 Replies)
Discussion started by: sinpeak
2 Replies

4. Linux

What are the meaning of these macros..

Masters, I am trying to learn the serial mouse driver for linux kernel. On the kernel source tree I find out these macros and I am unable to find out the meaning of these macros. Please anyone help me to understand these. These macros are defined in linux/serio.h... (2 Replies)
Discussion started by: iamjayanth
2 Replies

5. UNIX for Dummies Questions & Answers

what the meaning of #*

can some one please tell the meaning of the second statement i.e n=${m#*=} i couldnt get the meaning of the #*= 1.) m="mohit=/c/main/issue" echo $m result ----------- mohit=/c/main/issue 2.) n=${m#*=} echo $n RESULT ------- /c/main/issue (1 Reply)
Discussion started by: narang.mohit
1 Replies

6. Shell Programming and Scripting

meaning of !*

can someone please tell what !* means in shell syntax. Regards, (3 Replies)
Discussion started by: busyboy
3 Replies

7. Shell Programming and Scripting

^$$ meaning

Hi , Can anyone please let me know whta the follwoing piece of code for ScriptName=${0##*/} if pgrep -f "$ScriptName" | grep -v "^$$\$" ; then echo `date`": Sctipt $ScritName is already runnig" exit fi Thnx a lot in advance Please use code tags when posting data and code... (8 Replies)
Discussion started by: Pratik4891
8 Replies

8. UNIX for Dummies Questions & Answers

meaning of <<!

Hi all, I wanna know the meaning of the last word "<<! " sudo su - user <<! please help on this !!!! (1 Reply)
Discussion started by: sudharson
1 Replies

9. Shell Programming and Scripting

Meaning

Please let me know the meaning for the below statements in shell scripting. 1) exit -99 -------------------------------- 2) set prgdir = `pwd` set runFlag = runFlag:FALSE ------------------------------------- 3) if (-f $prgdir/maillst.eml) then set distEmail = `cat $prgdir/maillst.eml`... (1 Reply)
Discussion started by: lg123
1 Replies

10. Shell Programming and Scripting

Meaning of $1^

Hello everyone, I'm looking for the meaning of this expression, as I don't understand it quite clearly : $1^ What do you think it could be? I thought either: - match lines starting with argument 1 but it should be ^$1 - turn line around : word becomes drow Thanks in advance for your... (4 Replies)
Discussion started by: bibelo
4 Replies
clear(3XCURSES) 					  X/Open Curses Library Functions					   clear(3XCURSES)

NAME
clear, erase, wclear, werase - clear a window SYNOPSIS
cc [ flag... ] file... -I /usr/xpg4/include -L /usr/xpg4/lib -R /usr/xpg4/lib -lcurses [ library... ] c89 [ flag... ] file... -lcurses [ library... ] #include <curses.h> int clear(void); int erase(void); int wclear(WINDOW *win); int werase(WINDOW *win); DESCRIPTION
The clear() and erase() functions clear stdscr, destroying its previous contents. The wclear() and werase() functions perform the same action, but clear the window specified by win instead of stdscr. The clear() and wclear() functions also call the clearok() function. This function clears and redraws the entire screen on the next call to refresh(3XCURSES) or wrefresh(3XCURSES) for the window. The current background character (and attributes) is used to clear the screen. PARAMETERS
win Is a pointer to the window that is to be cleared. ERRORS
OK Successful completion. ERR An error occurred. ATTRIBUTES
See attributes(5) for descriptions of the following attributes: +-----------------------------+-----------------------------+ | ATTRIBUTE TYPE | ATTRIBUTE VALUE | +-----------------------------+-----------------------------+ |Interface Stability |Standard | +-----------------------------+-----------------------------+ |MT-Level |Unsafe | +-----------------------------+-----------------------------+ SEE ALSO
bkgdset(3XCURSES), clearok(3XCURSES), clrtobot(3XCURSES), clrtoeol(3XCURSES), doupdate(3XCURSES), libcurses(3XCURSES), refresh(3XCURSES), wrefresh(3XCURSES), attributes(5), standards(5) SunOS 5.11 5 Jun 2002 clear(3XCURSES)
All times are GMT -4. The time now is 03:11 AM.
Unix & Linux Forums Content Copyright 1993-2022. All Rights Reserved.
Privacy Policy