04-10-2009
>filename
It will clear the contents in a file
10 More Discussions You Might Find Interesting
1. UNIX for Dummies Questions & Answers
hey peeps
could someone explain what this part of the code means:
'if echo $* | grep -q' $i '||
thanks
tHe_nEw_GuY (2 Replies)
Discussion started by: the_new_guy
2 Replies
2. Post Here to Contact Site Administrators and Moderators
Can you guys please enable the "dotted" icon option, so that the thread icon for a thread in which a user has posted in will appear with a dot in it?
Thanks,
Aaron (2 Replies)
Discussion started by: Spetnik
2 Replies
3. UNIX for Advanced & Expert Users
Hi ,
Can anyone explains what does the below highlighted statements means:
# Set environment variables
. ${0%/*}/wrkenv.sh
jobName_sh=${0##*/}
jobName=${jobName_sh%.*}
Thanks,
Sri (1 Reply)
Discussion started by: srilaxmi
1 Replies
4. Shell Programming and Scripting
ccc_con,CCC_CON,0
Above is the input for this code
#!/usr/bin/bash
my_path=`dirname $0`
T_table=$1
S_table=$2
P_table=$3
#Star new code
while read ${my_path}/arch_table_list.txt
{
awk -F "," '{print $1}' ${my_path}/arch_table_list.txt ${S_table}
awk -F "," '{print... (1 Reply)
Discussion started by: scorp_rahul23
1 Replies
5. Shell Programming and Scripting
while getopts :g:l:h: KEY $*
do
case $KEY
in
g) NAME=$OPTARG ;;
l) LAB=$OPTARG ;;
h) HD=$OPTARG ;;
*) echo "Illegal option: $OPTARG"
echo "$usage"
exitStatus=1
exitGrace
esac
done (2 Replies)
Discussion started by: santosh1234
2 Replies
6. Shell Programming and Scripting
Hi,
Can anyone pls explain me the below SED code in detail.
sed -e :a -e '$!N;s/\n//;ta' -e P -e D
When this code is executed with a file(has 1lac records), it is taking very long time to process.
So I wanted to modify this SED code with equivalant AWK code.
Thanks,
Sri (1 Reply)
Discussion started by: srilaxmi
1 Replies
7. Shell Programming and Scripting
I have something like in the script. Can anyone explain what does the sort command does and followed by the sed
sort -r -k3.7,3 -k3.1,3 -k3.4,3 -t: $dir"abc_"$x"_parsed" | sed -e 's/\(\)\(\{3\}\)/\1,\2/2' -e 's/\/2,00/\/200/'
The file abc_"$x"_parsed contains something like below
... (7 Replies)
Discussion started by: Muthuraj K
7 Replies
8. Shell Programming and Scripting
Hi,
Pls explain me what the below code is doing. specially meaning if -a while calling test function-
case $1 in
1) beg_dt=01; end_dt=07 ;;
2) beg_dt=08; end_dt=14 ;;
3) beg_dt=15; end_dt=21 ;;
4) beg_dt=22; end_dt=28 ;;
5) beg_dt=29; end_dt=31 ;;
esac test \( `date +%w` -eq $2 -a... (3 Replies)
Discussion started by: sendtoshailesh
3 Replies
9. Shell Programming and Scripting
Hi Guys,
Please help me, I am new to programming and I don’t understand what some parts of this code are doing. I have comments on the parts I know, please help if my understanding of the code is not correct and also help with parts with questions.
awk '
{
gsub( ">",... (1 Reply)
Discussion started by: James_Owen
1 Replies
10. Shell Programming and Scripting
can anyone please explain this code?
sed ':a;N;$!ba;s/]\n//g' file
it replaces lines ending with "]" and concatenates with the next line so that
line1]
line2
becomes
line1line2
i don't understand this part: :a;N;$!ba;
I have noted that I can replace "a" with any letter:
... (1 Reply)
Discussion started by: locoroco
1 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 5.10 5 Jun 2002 clear(3XCURSES)