Hi everybody
for file in *
#Bash performs filename expansion
#+ on expressions that globbing recognizes.
do
output="`grep -n "$1" "$file"`"
echo "$file: `expr "$output" : '\(^.*$\)'`"
done
In the above bash script segment, I try to print just the first line of string named... (3 Replies)
Couldn't find much help on the kind of question I've here:
There is this text file with text as:
Line one has a bingo
Line two does not have a bingo but it has a tango
Bingo is on line three
Line four has both tango and bingo
Now I would want to search for the pattern "bingo" in this file... (3 Replies)
Good Day,
Im new to scripting especially awk and sed. I just would like to ask help from you guys about a sed command that prints the line immediately after a regexp, but not the line containing the regexp.
sed -n '/regexp/{n;p;}' filename
What if my regexp is 3 word or a sentence. Im... (3 Replies)
Greetings all,
...here is yet another string of awk/sed questions from a RegExp-Challenged luser :eek:
I'm looking to have sed/awk do some clean-up on routing tables and to that end, I would like to do the following:
1.) If a line contains the word "masks" or "subnets" prepend CR/LF to... (16 Replies)
Hi,
I'm curious about how to do a very simple thing with regular expressions that I'm unable to figure out.
If I want to find out if a string contains 'a' AND 'b' AND 'c' it can be very easily done with grep:
echo $STRING|grep a|grep b|grep c
but, how would you do that in a single... (9 Replies)
continuing from my previous post, whose link is given below as a reference
https://www.unix.com/shell-programming-scripting/171076-shell-scripting.html#post302573569
consider there is create table commands in a file for eg:
CREATE TABLE `Blahblahblah` (
`id` int(11) NOT NULL... (2 Replies)
I need help with a regexp to find out the ip address which can possibly be present in a URL.
The URLs can be in any of the following form
<domain>?a=12345&d=somestring1
<domain>?c=10.10.10.100&d=somestring1
<domain>?a=12345&b=somestring1&c=10.1.2.4d=somestring2... (3 Replies)
Hi,
I am trying with the below Perl one-liner using regular expression to extract the first and second column of a text file:
perl -p -e "s/\s*(\w+).*/$1/"
perl -p -e "s/\s*.+\s(.+)\s*/$1\n/"
whereas the text file's data looks like:
Error: terminated 2233
Warning: reboot 3434
Warning:... (3 Replies)
I'm probably just not thinking of the correct term to search for :-) But I want to match a pattern that might be 'ABC' or '1ABC' there might be three characters, or there might be four, but if there are four, the first has to be 1 (1 Reply)
Trying to find and replace one string with another string in a file
#!/usr/bin/perl
$csd_table_path = "/file.ntab";
$find_str = '--bundle_type=021';
$repl_str = '--bundle_type=021 --target=/dev/disk1s2';
if( system("/usr/bin/perl -p -i -e 's/$find_str/$repl_str/' $csd_table_path")... (2 Replies)
Discussion started by: cillmor
2 Replies
LEARN ABOUT V7
test
TEST(1) General Commands Manual TEST(1)NAME
test - condition command
SYNOPSIS
test expr
DESCRIPTION
test evaluates the expression expr, and if its value is true then returns zero exit status; otherwise, a non zero exit status is returned.
test returns a non zero exit if there are no arguments.
The following primitives are used to construct expr.
-r file true if the file exists and is readable.
-w file true if the file exists and is writable.
-f file true if the file exists and is not a directory.
-d file true if the file exists and is a directory.
-s file true if the file exists and has a size greater than zero.
-t [ fildes ]
true if the open file whose file descriptor number is fildes (1 by default) is associated with a terminal device.
-z s1 true if the length of string s1 is zero.
-n s1 true if the length of the string s1 is nonzero.
s1 = s2 true if the strings s1 and s2 are equal.
s1 != s2 true if the strings s1 and s2 are not equal.
s1 true if s1 is not the null string.
n1 -eq n2
true if the integers n1 and n2 are algebraically equal. Any of the comparisons -ne, -gt, -ge, -lt, or -le may be used in place of
-eq.
These primaries may be combined with the following operators:
! unary negation operator
-a binary and operator
-o binary or operator
( expr )
parentheses for grouping.
-a has higher precedence than -o. Notice that all the operators and flags are separate arguments to test. Notice also that parentheses
are meaningful to the Shell and must be escaped.
SEE ALSO sh(1), find(1)TEST(1)