Hello!
I'm having problems trying to extract the contents of a variable and placing it into a text file. Grateful for any help.
Been trying something along the lines of:
$variable > file.txt
or
`cat < $variable` > file.txt
As you can see I'm a newbie to this :D (2 Replies)
Hi all,
I have a problem here. I have a file and let we take the content of the file is just '32' (only a numeric value in that file). Now I need to assign this numeric value ( value in that file) to a variable. Is that possible? If so, can you plz advice me on this?
Thanks in... (4 Replies)
I may not being doing this description justice, but I'll give it a try.
I created a mailx script; there will be several messages using the same script where the only difference is the content. So I figured I'd make the content of the message a variable retrieved from a separate file. I have five... (5 Replies)
For example, I have a simple text file
note:
this a note
a simple note
a very very simple notewhen I use this command,
temp=$(cat "note.txt")then I echo temp, the result is in one line.
echo $temp
note: this a note a simple note a very very simple noteMy variable doesn't have newline.
How... (7 Replies)
I have a file File1 containing lines like below
apple ${FRUIT}-Color
orange ${FRUIT}-Color
banana ${FRUIT}-Color
Now, in my shell I'm reading the file like below
while read FRUIT DESC; do echo $FRUIT $DESC; done < File1
which outputs -
apple ${FRUIT}-Color
orange ${FRUIT}-Color... (3 Replies)
Hi Gurus,
I need replace multiple files content.
the file name pattern likes currentfile_code_*
the content pattern in the file like text=value
I need replace the content as text=abcde
Thanks in advance (7 Replies)
hi i just cant figure out how can i do this ls -lt > log.txt using $PWD
what i mean is how can i get the ls command content into a file using $PWD variable? :confused: (4 Replies)
I need to make ~96 configure files from a template config file which has hundreds of rows that looks like:
template.config:
#average insert size
avg_ins=1000
......
other information omitted
Those config files are named in sequence from S01.config, S02.config, ... etc
with different... (11 Replies)
Dear all,
I have a "SQL request" in a file: that request include different "host variable" and I would like to substitute the different "host variable" by their respective content before executing the request.
For example:
$ echo $SHELL
/bin/bash
$ cat dae2.txt
DELETE FROM ... (11 Replies)
Team,
I want to change below parameter in all the files in a directory,
Check for HOSTNAME=`hostname`
Change to HOSTNAME=localhost
And I tried below but, its not working ☹
find /tmp -type f -exec sed 's/"HOSTNAME\=\`hostname\`"/"HOSTNAME\=localhost/g'"
Help me if I am missing... (6 Replies)
Discussion started by: natraj005
6 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)