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1. UNIX for Beginners Questions & Answers
Hi,
I've got a directory of about 6000 txt files that look like this:
a b c d
e f g h
k l m n
I need to execute a command on them to combine them and, in the end, have one big file with all the needed columns taken form all the 6000 files. I've got the "combining" program, but my problem... (26 Replies)
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2. UNIX for Dummies Questions & Answers
Hi All,
I have a input file as below. Input file may contain more hostlists.
sample Input file
$ cat hostlist.lst
cs18-db1-1-sjl
cs22-db1-1-was
na88-db1-1-chi
na21-db1-2-was
I want the output like below format. Pls help. Thanks !
Output format:
... (4 Replies)
Discussion started by: kamauv234
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3. AIX
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4. IP Networking
Hi all,
I have a script which permits users to access to a large list of IP ranges. Before, access to these ranges was granted by using a shell script to perform the necessary FORWARD chain command to allow traffic coming from the br0 interface and exiting the WAN interface, since br0 was... (0 Replies)
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5. Ubuntu
Hi,
I have the doubt which involved following configuration.
comp1<--->main<--->comp2
Comp1 sends icmp packet to main. Main takes that packet and changes destination address to comp2 and source address to it own.
I can capture the packet send from comp1 to main using netfilter. I can see the... (0 Replies)
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6. Ubuntu
Hi,
I am new to linux stuff. I want to use linux iptables to configure rule so that all my incoming traffic with protocol "tcp" is forwarded to the "FORWARD CHAIN". The traffic i am dealing with has destination addresss of my machine but i want to block it from coming to input chain and somehow... (0 Replies)
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7. UNIX for Advanced & Expert Users
Hello,
I'm having problem with an iptables rule. It seems that on one of two systems on the nat table, the INPUT chain doesn't exist for some strange reason.
I get the error below:
# iptables -t nat -A INPUT -j ACCEPT
iptables: No chain/target/match by that name.
Here is my kernel on... (0 Replies)
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8. Shell Programming and Scripting
Hi,
I have two files , one file with data file with attributes that need to be sent to another file to generate a predefined format.
Example:
File.txt
AP|{SSHA}VEEg42CNCghUnGhCVg==
APVG3|{SSHA}XK|"password"
AP3|{SSHA}XK|"This is test"
....
etc
---------
test.sh has... (1 Reply)
Discussion started by: hudson03051nh
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9. Shell Programming and Scripting
Hi,
I am having an Input file .which is having a list of names.
comapring with our database , needs to write the out put in file called output.txt , format should be name--> country--->phone number
could you please help me..
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10. Shell Programming and Scripting
Hey,
I am fiddling with a little script to kill a certain program if it freezes. Basically I want to do something like this:
ps -A | grep firefox-bin | read -d ' ' pid
kill $pid
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Firewall mark classifier in tc(8) Linux Firewall mark classifier in tc(8)
NAME
fw - fwmark traffic control filter
SYNOPSIS
tc filter ... fw [ classid CLASSID ] [ action ACTION_SPEC ]
DESCRIPTION
the fw filter allows to classify packets based on a previously set fwmark by iptables. If it is identical to the filter's handle, the fil-
ter matches. iptables allows to mark single packets with the MARK target, or whole connections using CONNMARK. The benefit of using this
filter instead of doing the heavy-lifting with tc itself is that on one hand it might be convenient to keep packet filtering and classifi-
cation in one place, possibly having to match a packet just once, and on the other users familiar with iptables but not tc will have a less
hard time adding QoS to their setups.
OPTIONS
classid CLASSID
Push matching packets to the class identified by CLASSID.
action ACTION_SPEC
Apply an action from the generic actions framework on matching packets.
EXAMPLES
Take e.g. the following tc filter statement:
tc filter add ... handle 6 fw classid 1:1
will match if the packet's fwmark value is 6. This is a sample iptables statement marking packets coming in on eth0:
iptables -t mangle -A PREROUTING -i eth0 -j MARK --set-mark 6
SEE ALSO
tc(8), iptables(8), iptables-extensions(8)
iproute2 21 Oct 2015 Firewall mark classifier in tc(8)