Hello All
I am running redhat linux 7.2 and would like to know how i can block telnetting to a specified port .
say for example i would like to block telnet acesses to port 80.
regards
Xiamin (5 Replies)
Hello all...
I have a slight problem in my awk script...
I have a script which checks a csv file and keeps a count of any invalid records and then if it finds any, exits with a code of 1. problem is it dosnt seem to work properly :rolleyes: Everthing seem to work interms of the stats output,... (1 Reply)
Hi Everyone , have a great day
i have a file which has almost 20,000 blocks each starting with this particular line " rTCCreditControlRecord " , how can i bring out the 7172 block out of that file
Thanks in Anticipation (7 Replies)
Hi guys i am new to shell scripting. I wrote this script that simply searches a column value of file1 from file2.
please look at the code below:
awk '
FILENAME==ARGV { file_1_data=$0; next }
FILENAME==ARGV { file_2_data=substr($3,1,12); next }
END { ... (5 Replies)
Hi.
I have a list with files, and I would like to add a variable to the end of each line of each file in this list. The files are in a folder together with a large number of other files which I don't want to change.
My code is:
for file in 'cat ../list'
do
sed 's/$/\/R:_0/' $file >>... (4 Replies)
There are huge number of messages in syslog suggesting one of the client's IP is trying to telnet/ssh/pop/imap into the OSR5.0.7 system, it happens every minute or so, see a snippet below
Oct 9 13:11:20 myhost popper: (null) at 192.168.1.123 (192.168.1.123): -ERR POP EOF or I/O Error: 25... (3 Replies)
Hi :)
Yo quisiera saber si se puede definir procedimientos dentro del bloque END.
for example ...
BEGIN {i=1}
{
if ($1 == $2)
cadena = $3
}
END {
find_letter(cadena)
}
find_letter(cadena
{
...
} (3 Replies)
Hi,
I have a scenario where I want to display the output based on the pattern search between the start and end of a block in a file, we can have multiple start and end blocks in a file.
Example give below, we need to search between the start block abc and end block def in a file, after that... (5 Replies)
Hi,
I need to block ssh port 22 from all the servers except one server ip.
Until solaris11.3 and below, I used to do like below(under /etc/ipf/ipf.conf),and it's working fine
pass in quick from $server_ip to any port=22
block in quick from any to any port=22
But I tried almost same in... (1 Reply)
Discussion started by: Sumanthsv
1 Replies
LEARN ABOUT DEBIAN
plan9-grep
GREP(1) General Commands Manual GREP(1)NAME
grep, g - search a file for a pattern
SYNOPSIS
grep [ option ... ] pattern [ file ... ]
g [ option ... ] pattern [ file ... ]
DESCRIPTION
Grep searches the input files (standard input default) for lines that match the pattern, a regular expression as defined in regexp(7) with
the addition of a newline character as an alternative (substitute for |) with lowest precedence. Normally, each line matching the pattern
is `selected', and each selected line is copied to the standard output. The options are
-c Print only a count of matching lines.
-h Do not print file name tags (headers) with output lines.
-e The following argument is taken as a pattern. This option makes it easy to specify patterns that might confuse argument parsing,
such as -n.
-i Ignore alphabetic case distinctions. The implementation folds into lower case all letters in the pattern and input before interpre-
tation. Matched lines are printed in their original form.
-l (ell) Print the names of files with selected lines; don't print the lines.
-L Print the names of files with no selected lines; the converse of -l.
-n Mark each printed line with its line number counted in its file.
-s Produce no output, but return status.
-v Reverse: print lines that do not match the pattern.
-f The pattern argument is the name of a file containing regular expressions one per line.
-b Don't buffer the output: write each output line as soon as it is discovered.
Output lines are tagged by file name when there is more than one input file. (To force this tagging, include /dev/null as a file name
argument.)
Care should be taken when using the shell metacharacters $*[^|()= and newline in pattern; it is safest to enclose the entire expression in
single quotes '...'. An expression starting with '*' will treat the rest of the expression as literal characters.
G invokes grep with -n and forces tagging of output lines by file name. If no files are listed, it searches all files matching
*.C *.b *.c *.h *.m *.cc *.java *.cgi *.pl *.py *.tex *.ms
SOURCE
/src/cmd/grep
/bin/g
SEE ALSO ed(1), awk(1), sed(1), sam(1), regexp(7)DIAGNOSTICS
Exit status is null if any lines are selected, or non-null when no lines are selected or an error occurs.
GREP(1)