The notation can be confusing (it's alien, really). But it's worth learning. I thought I knew it pretty well, but some of the stuff I see here is really awesome.
To answer your questions, I don't know what :g//d does. g generally means "global" and d "delete", but in the VI I'm using it doesn't work.
You already know what \(...\) means, you said.
s/.*//g means replace everything with nothing (where /.*/ means everything and // means nothing).
Hello,
I am getting very confused as to where should i quote special/metacharacters in shell.
Sometimes i write * directly and it works, othertimes i have to do "*".
Same is the case with other special characters like /,\,.,$,etc.
Can somebody give me link to somewhere where i can found... (1 Reply)
Hi,
I have a file which has special characters. I can't see them when I "vi" the file. But I am sure there are some special un seen characters. How can I see them?
Please help.
Thx (6 Replies)
Hi,
I am reading a file (GC_JAR.log) which has entries like:
511725.629, 0.1122672 secs]
525268.975, 0.1240036 secs]
527181.835, 0.2068215 secs]
527914.287, 0.2884801 secs]
528457.134, 0.2548725 secs]
I want to replace all the entries of "secs]" with just "secs"
Thus, the output... (4 Replies)
When I open a file in vi, I see the following characters:
\302\240
Can someone explain what these characters mean. Is it ASCII format? I need to trim those characters from a file.
I am doing the following:
tr -d '\302\240'
---------- Post updated at 08:35 PM ---------- Previous... (1 Reply)
Hi all,
I was wondering how can i see the special characters like \t, \n or anything else in a file by using Nano or any other linux command like less, more etc (6 Replies)
i need to replace the any special characters with escape characters like below.
test!=123-> test\!\=123
!@#$%^&*()-= to be replaced by
\!\@\#\$\%\^\&\*\(\)\-\= (8 Replies)
Hi All,
I have some text including Turkish characters and the 3rd party application that reads my file does not supporting this character set (at least, I have no control on it).
So, I used below conversion for maximum character support but still have problems with "İ" and "Ş". Application... (5 Replies)
I'm trying to remove '--X' from the whole file and using variables replace $oldvar with $newvar.
I have tried with double quotes but it doesn't seem to work. $newvar is set to /usr/bin/bash. Would appreciate some guidance.
newvar=$(which bash)
oldvar=/bin/bash
sed... (1 Reply)
Discussion started by: itman73
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)