I am trying to use sed to replace specific characters at a specific position in the file with a different value... can this be done?
Example:
File:
A0199999123
A0199999124
A0199999125
Need to replace 99999 in positions 3-7 with 88888.
Any help is appreciated. (5 Replies)
Hi all,
I'm new to shell scripting and hence this query.
I have 2 files. temp.txt and config.txt.
The values in temp.txt are tab separated.
ex: temp.txt
AB CDE GHIJ OPQRS WXY
ex:config.txt (1st line for 1st element of temp.txt and so on)
start = '1' end='5'
start = '6' end =... (26 Replies)
I have a txt file having rows and coulmns, i want to perform some operation on a specific coulmn starting from a specific line.
eg:
50.000000 1 1 1
1000.00000
1000.00000
50000.000
19
19
3.69797533E-07 871.66394 ... (3 Replies)
I woud like to substitue a string on a specific position for specific lines
I've got a file and I would like to change a specific string from "TOCHANGE" to "ABCABCAB"
For every line (except 1,2, 3 and the last one) , I need to check between the 9th and the 16th digits.
For the 3rd line, I... (7 Replies)
I want to remove the trailing spaces at the end of each line starting from a particular position(using ksh script). For example, in the attached file, I want to remove all the spaces starting from the position 430 till the end. The space has to be removed only from the 430th position no matter in... (3 Replies)
I have a file called "INPUT" which takes the following format
MNT-BANK-NUMBERO:006,00:N
MNT-100-ACCOUNT-NUMBERO:018,00:N
MNT-1000-DESCRIPTIONO:045:C
.
.
.
Now i got to find the displacements of the account numbers of each field of a file.
For the field MNT-BANK-NUMBERO:006,00:N, the... (4 Replies)
Hi
This is my first post and I'm just a beginner. So please be nice to me.
I have a couple of html files where a pattern beginning with "http://www.site.com" and ending with "/resource.dat" is present on every 241st line. How do I extract this to a new text file?
I have tried sed -n 241,241p... (13 Replies)
e.g.
File name: File.txt
cat File.txt
Result:
#INBOUND_QUEUE=FAQ1
INBOUND_QUEUE=FAQ2
I want to get the value for one which is not commented out.
Thanks, (3 Replies)
I have a log file which have a date and time at the start of every line.
I need to search the log file starting from a specific time to the end of file.
For example:
Starting point: July 29 2018 21:00:00
End point : end of file
My concern is what if the pattern of `July 29 2018 21:00:00`... (3 Replies)
I will appreciate if you help me here in this script in Solaris Enviroment.
Scenario:
i have 2 files :
1) /tmp/TRANSACTIONS_DAILY_20180730.txt:
201807300000000004
201807300000000005
201807300000000006
201807300000000007
201807300000000008
2)... (10 Replies)
Discussion started by: teokon90
10 Replies
LEARN ABOUT DEBIAN
tcptrack
tcptrack(1) General Commands Manual tcptrack(1)NAME
tcptrack - Monitor TCP connections on the network
SYNOPSIS
tcptrack [ -dfhvp ] [ -r seconds ] -i interface
[ filter expression ]
DESCRIPTION
tcptrack displays the status of TCP connections that it sees on a given network interface. tcptrack monitors their state and displays
information such as state, source/destination addresses and bandwidth usage in a sorted, updated list very much like the top(1) command.
The filter expression is a standard pcap filter expression (identical to the expressions used by tcpdump(8)) which can be used to filter
down the characteristics of TCP connections that tcptrack will see. See tcpdump(8) for more information about the syntax of this expres-
sion.
OPTIONS -d Only track connections that were started after tcptrack was started. Do not try to detect existing connections.
-f Enable fast average recalculation. TCPTrack will calculate the average speeds of connections by using a running average. TCPTrack
will use more memory and CPU time, but averages will seem closer to real time and will be updated more than once per second and may
be more accurate under heavy load. The number of times per second that averages will be recalculated in fast mode is a compile-time
setting that defaults to 10 times per second.
-h Display command line help
-i [interface]
Sniff packets from the specified network interface.
-T [pcap file]
Read packets from the specified file instead of sniffing from the network. Useful for testing.
-p Do not put the interface being sniffed into promiscuous mode.
-r [seconds]
Wait this many seconds before removing a closed connection from the display. Defaults to 2 seconds. See also the pause interactive
command (below).
-v Display tcptrack version
INTERACTIVE COMMANDS
The following keys may be pressed while tcptrack is running to change runtime options:
p - Pause/unpause display. No new connections will be added to the display, and all currently displayed connections will remain in the dis-
play.
q - Quit tcptrack.
s - Cycle through the sorting options: unsorted, sorted by rate, sorted by total bytes.
The options for pausing and toggling sorting are useful if you're watching a very busy network and want to look at the display without con-
nections jumping around (due to sorting and new connections being added) and disappearing (due to being closed for a certain time).
When paused (via the p command) no new connections will be displayed, however tcptrack will still monitor and track all connections it sees
as usual. This option affects the display only, not internals. When you unpause, the display will be updated with all current information
that tcptrack has been gathering all along.
EXAMPLES
tcptrack requires only one parameter to run: the -i flag followed by an interface name that you want tcptrack to monitor. This is the most
basic way to run tcptrack:
# tcptrack -i eth0
tcptrack can also take a pcap filter expression as an argument. The format of this filter expression is the same as that of tcpdump(8) and
other libpcap-based sniffers. The following example will only show connections from host 10.45.165.2:
# tcptrack -i eth0 src or dst 10.45.165.2
The next example will only show web traffic (ie, traffic on port 80):
# tcptrack -i eth0 port 80
SEE ALSO tcpdump(8), pcap(3), http://www.rhythm.cx/~steve/devel/tcptrack
BUGS
When picking up a connection that was already running before tcptrack was started, there is no way tcptrack can know for sure which end of
the connection is the client (ie, which peer started the connection) and which is the server (ie, which peer was listening). tcptrack makes
a crude guess at which is which by looking at the port numbers; whichever end has the lower port number is considered the server side. This
isn't always accurate of course, but future versions may have better heuristics to figure out which end is which.
Currently the interface is not very flexible. Display timing settings (such as the refresh interval) can only be changed by editing the
source code (defs.h in particular). See the TODO file included with the source distribution for further bugs.
tcptrack(1)