No doubt these questions have been answered many times, but I struggled to find them - sorry. 2 questions:
1. I wish to read in a file one line at a time and do 'stuff' with it, such as:
If 'line' has 6 columns and I want only $4, how do I insert only that column into the web address rather the whole line?
2. If I have 2 files A & B, both having multiple columns, how do I take these 2 files and create a new file with columns in the format A2, B1, A3. Where A2 denotes the 2nd column from file A etc.
I have a csv file with 3 columns. Column 1 is a date "mm/dd/yyyy", column 2 is a dollar amount (e.g. "100.00") & column 3 in a description of where the transaction took place (e.g. "CHECK CRD PURCHASE 10/07 ACME INC USA")
so...
"10/01/2009","100.00", "CHECK CRD PURCHASE 10/07 ACME INC USA"
I... (1 Reply)
*This is not homework I am new to UNIX and want to try this Monitoring a file demo*
*If this is the wrong forum please move it - im new to the forums*
$1 = the file to be monitored
$2 = the time for the file to sleep
If the file gets changed (using -nt) it will send my username mail saying... (2 Replies)
So, I want to read line-by-line a text file with unknown number of files....
So:
a=1
b=1
while ; do
b=`sed -n '$ap' test`
a=`expr $a + 1`
$here do something with b etc
done
the problem is that sed does not seem to recognise the $a, even when trying
sed -n ' $a p'
So, I cannot read... (3 Replies)
I need some help. I would like to read in a text file.
Take a variable such as ROW-D-01, compare it to what's in one line in the text file such as PROD/VM/ROW-D-01 and only input PROD/VM into a variable without the /ROW-D-01.
Is this possible? any help is appreciated. (2 Replies)
Hi,
i have a scenario were i should compare a few fields from each line then increment a variable based on that.
Example file
989878|8999|Y|0|Y|N|V
989878|8999|Y|0|N|N|V
989878|8999|Y|2344|Y|N|V
i have 3 conditions to check and increment a variable on every line
condition 1 if ( $3... (4 Replies)
Hi,
I want to read a live log file line by line and considering those line which start from time stamp;
Below code I am using, which read line but throws an exception when comparing line that does not contain error code
tail -F /logs/COMMON-ERROR.log | while read myline; do... (2 Replies)
Hello,
I am creating a new disk using the following command:
dd if=/dev/zero of=/export/home/ramdisk/0 bs=512 count=4096k
after creating the disk, i tool a ufsdump of a solaris 10 filesytem (disk size 512MB)
ufsdump -cvf /export/home/ufsdump/sol_orig /and then restored the dump files onto... (10 Replies)
:D:D:D
These are list of command i typed on opensuse terminal and evolve lots of doubt around ,that i can't answer.
COMMAND 1 linux-xavv:/ # cd
COMMAND 2 linux-xavv:~ #
Does above command 1 and command two with red labelled sign make different meaning or same .
1
linux-xavv:/... (1 Reply)
Hi All,
i want to write a shell script read below file line by line and want to exclude the lines which contains empty value for MOUNTPOINT field.
i am using centos 7 Operating system.
want to read below file.
# cat /tmp/d5
NAME="/dev/sda" TYPE="disk" SIZE="60G" OWNER="root"... (4 Replies)
Discussion started by: balu1234
4 Replies
LEARN ABOUT DEBIAN
dpkg-reconfigure
DPKG-RECONFIGURE(8) Debconf DPKG-RECONFIGURE(8)NAME
dpkg-reconfigure - reconfigure an already installed package
SYNOPSIS
dpkg-reconfigure [options] packages
DESCRIPTION
dpkg-reconfigure reconfigures packages after they have already been installed. Pass it the names of a package or packages to reconfigure.
It will ask configuration questions, much like when the package was first installed.
If you just want to see the current configuration of a package, see debconf-show(1) instead.
OPTIONS -ftype, --frontend=type
Select the frontend to use. The default frontend can be permanently changed by:
dpkg-reconfigure debconf
Note that if you normally have debconf set to use the noninteractive frontend, dpkg-reconfigure will use the dialog frontend instead,
so you actually get to reconfigure the package.
-pvalue, --priority=value
Specify the minimum priority of question that will be displayed. dpkg-reconfigure normally shows low priority questions no matter what
your default priority is. See debconf(7) for a list.
--default-priority
Use whatever the default priority of question is, instead of forcing the priority to low.
-a, --all
Reconfigure all installed packages that use debconf. Warning: this may take a long time.
-u, --unseen-only
By default, all questions are shown, even if they have already been answered. If this parameter is set though, only questions that have
not yet been seen will be asked.
--force
Force dpkg-reconfigure to reconfigure a package even if the package is in an inconsistent or broken state. Use with caution.
--no-reload
Prevent dpkg-reconfigure from reloading templates. Use with caution; this will prevent dpkg-reconfigure from repairing broken templates
databases. However, it may be useful in constrained environments where rewriting the templates database is expensive.
-h, --help
Display usage help.
SEE ALSO debconf(7)AUTHOR
Joey Hess <joeyh@debian.org>
2012-12-21 DPKG-RECONFIGURE(8)