Hi,
Could you please explain me the below statement -- phrase wise.
sed -e :a -e '$q;N;'$cnt',$D;ba' abc.txt > xyz.txt
if suppose $cnt contains value: 10
it copies last 9 lines of abc.txt to xyz.txt
why it is copying last 9 rather than 10.
and also what is ba and $D over there in... (4 Replies)
I want to write a line to a log file for each mountpoint that is above 75% disk space used.
I have written the following so far which doesn't take into account the checking for 75% yet but simply tries to write a line for every mountpoint into the logfile.
#!/bin/ksh
PERCENTAGES=`bdf | grep... (1 Reply)
Hello!
I want to read a file line by line and have each line in a variable. I have found the following code.
#!/bin/bash
exec 3< data
while read <&3
do echo "The number is $REPLY"
a.out "$REPLY"
done
exec 3>&-
I don't understand the use of exec and its arguments, though having read... (3 Replies)
hi this is the output of showrev command from my sun blade 150 machine.
bash-3.00# showrev
Hostname: u15_9
Hostid: 83685284
Release: 5.10
Kernel architecture: sun4u
Application architecture: sparc
Hardware provider: Sun_Microsystems
Domain: sun.com
Kernel version: SunOS 5.10... (1 Reply)
Hi all,
I'm very new to UNIX. I have got a coding, where i dont understand the below part. Could someone please explain it in detail?
awk 'NR > 1; NR == 1 { S = $0 } END { print S }' $textfile.bak > $textfile
could someone explain what
awk 'NR > 1; NR == 1 { S = $0 } END { print S }'
... (1 Reply)
Could someone explain why Python 3.1 errors out below? Do I need an additional module that's not required in 3.2 perhaps? I need to use 3.1 as it's the version available on a server I am using.
Python 3.2.1rc1 (default, May 18 2011, 11:01:17)
on linux2
Type "help", "copyright", "credits"... (0 Replies)
Hi All,
I got stuck up with shell script where i use awk. The scenario which i am working on is as below.
I have a file text.txt with contents
COL1 COL2 COL3 COL4
1 A 500 400
1 B 500 400
1 A 500 200
2 A 290 300
2 B 290 280
3 C 100 100
I could able to sum col 3 and col4 based on... (3 Replies)
grep -E '^(++){5}5000' <file_name>
this command searches value 5000 in only 6th column from provided file where pipe ( | )is delimiter which separate columns... can some one plz explain me what '^(++){5}5000' actually does..? :confused: (1 Reply)
Hey Friends, its me again! :o
I was asked to create a script that would go into our backup directories and delete/purge anything in the directory after a certain amount of days, normally I would be able to write something up that goes to the directory finds it and deletes it.
cd... (12 Replies)
#!/bin/bash
n=$l; typeset -a v
x=$(< input.dat)
check(){
if; then
sed 's/Test/Proc/g' file.sh >fl.sh
else
exit 13
fi
}
check $n
while ; do
x=`expr $x -l`
v=$x
done
less fi.sh l>/dev/null&& echo yes || exit 1
echo v= ${v
}
exit 0
I have file.sh and input.dat in the current... (3 Replies)
Discussion started by: bananasprite
3 Replies
LEARN ABOUT CENTOS
igawk
IGAWK(1) Utility Commands IGAWK(1)NAME
igawk - gawk with include files
SYNOPSIS
igawk [ all gawk options ] -f program-file [ -- ] file ...
igawk [ all gawk options ] [ -- ] program-text file ...
DESCRIPTION
Igawk is a simple shell script that adds the ability to have ``include files'' to gawk(1).
AWK programs for igawk are the same as for gawk, except that, in addition, you may have lines like
@include getopt.awk
in your program to include the file getopt.awk from either the current directory or one of the other directories in the search path.
OPTIONS
See gawk(1) for a full description of the AWK language and the options that gawk supports.
EXAMPLES
cat << EOF > test.awk
@include getopt.awk
BEGIN {
while (getopt(ARGC, ARGV, "am:q") != -1)
...
}
EOF
igawk -f test.awk
SEE ALSO gawk(1)
Effective AWK Programming, Edition 1.0, published by the Free Software Foundation, 1995.
AUTHOR
Arnold Robbins (arnold@skeeve.com).
Free Software Foundation Nov 3 1999 IGAWK(1)