Sponsored Content
Full Discussion: Delete special characters
Top Forums Shell Programming and Scripting Delete special characters Post 303015129 by bakunin on Wednesday 28th of March 2018 03:58:16 PM
Old 03-28-2018
In addition to what rdrtx1 already explained:

If you want to change something only on certain lines and not on others you should do that in sed, not outside, with grep::

Code:
sed '/^special_line/ s/Y/X/g'

will change character "Y" to "X", but only on lines starting with "special_line". Likewise with your problem:

Code:
sed '/connections_per/ s/[<>]!*--//g' a

If you want only the changed lines as output:

Code:
sed -n '/connections_per/ s/[<>]!*--//g' a

As a rule of thumb: whenever you use sed, awk or a similar programmable text processing tool, do everything with it or use another tool. Any line with "...grep | sed | grep..." or "awk | sed | ..." is (very very rare cases aside) nonsense.

I hope this helps.

bakunin

Last edited by bakunin; 03-28-2018 at 05:18 PM.. Reason: typo
This User Gave Thanks to bakunin For This Post:
 

10 More Discussions You Might Find Interesting

1. UNIX for Dummies Questions & Answers

special characters

I have one file which is named ^? ( the DEL character ) I'd like to know how to rename or copy the file by using its i-node number TYIA (2 Replies)
Discussion started by: nawnaw
2 Replies

2. UNIX for Dummies Questions & Answers

How to delete a file with special characters

I don't now exactly how I did it, but I created a file named " -C " cexdi:/home1 $ls -lt total 1801336 -rw------- 1 cexdi ced-group 922275840 23 mars 10:03 -C How do I delete this file ? cexdi:/home1 $rm -C rm: invalid option -- C Syntax : rm filename ... Doesn't work...... (5 Replies)
Discussion started by: yveslagace
5 Replies

3. Shell Programming and Scripting

sed delete pattern with special characters

Hi all, I have the following lines <b>A gtwrhwrthwr text hghthwrhtwrtw </b><font color='#06C'>; text text (text) <b>B gtwrhwrthwr text hghthwrhtwrtw </b><font color='#06C'>; text text (text) <b>J gtwrhwrthwr text hghthwrhtwrtw </b><font color='#06C'>; text text (text) and I would like to... (5 Replies)
Discussion started by: stinkefisch
5 Replies

4. Shell Programming and Scripting

Special characters

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)
Discussion started by: sid1982
1 Replies

5. Shell Programming and Scripting

how to delete special characters from the file content

Hello Team, Any one suggest how to delte the below special character from a file which is having one column 10 rows of same below content. ---------------------------------------- Kosten|bersicht gemd_ ' =Welche Kosten kvnnen... (2 Replies)
Discussion started by: kanakaraju
2 Replies

6. UNIX for Dummies Questions & Answers

How to see special characters?

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)
Discussion started by: gvj
6 Replies

7. Shell Programming and Scripting

special characters

Hey guys, I'm trying to replace "]Facebook" from the text but sed 's/]Facebook/Johan/g' is not working could you please help me with that? (6 Replies)
Discussion started by: Johanni
6 Replies

8. Shell Programming and Scripting

Replace special characters with Escape characters?

i need to replace the any special characters with escape characters like below. test!=123-> test\!\=123 !@#$%^&*()-= to be replaced by \!\@\#\$\%\^\&\*\(\)\-\= (8 Replies)
Discussion started by: laknar
8 Replies

9. Shell Programming and Scripting

Look for substrings with special characters

Hello gurus, I have a lookup table cat tmp1 \\\erw``~ 1 ^774574574565665f\] 2 ()42543^ and I`m trying to compare a bunch of strings such that, either the lookup table column 1, or the string to be looked up are substrings of each other (and return the second lookup column if yes). ... (2 Replies)
Discussion started by: sheetalk
2 Replies

10. UNIX for Advanced & Expert Users

Need help to delete special characters exists only at the end of the each record in UNIX file?

Hi, I have a file in unix with 15 columns.It consists special characters(#,$,^M,@,*,% etc)at the end of the each record.I want to remove these special characters.I used the following: Sed -e 's/ /g;s/ */ /g' . But It is removing special characters exists everywhere in the file(begining,middle... (24 Replies)
Discussion started by: rakeshp
24 Replies
PYP(1)							      General Commands Manual							    PYP(1)

NAME
pyp - The Pyed Piper: A Modern Python Alternative to awk, sed and Other Unix Text Manipulation Utilities SYNOPSIS
pyp [options] files ... DESCRIPTION
pyp, the Pyed Piper, is a command line tool for text manipulation. It is similar to awk and sed in functionality, but its subcommands are Python based, and thus more familiar to many programmers. It can operate both on a per-line base and on the complete input stream. Different features can be pipelined in a single command by using the pipe character familiar from shell commands. pyp backs up its input for reruns with modified commands, and can save commands as macros. On the downside, the rerun feature makes it unsuitable for continuous pipe operation. OPTIONS
These programs follow the usual GNU command line syntax, with long options starting with two dashes (`-'). A summary of options is included below. For a complete description, use --manual. -h, --help Show this help message and exit. -m, --manual Prints out extended help. -l, --macro_list Lists all available macros. -s MACRO_SAVE_NAME, --macro_save=MACRO_SAVE_NAME Saves current command as macro. use "#" for adding comments EXAMPLE: pyp -s "great_macro # prints first letter" "p[1]". -f MACRO_FIND_NAME, --macro_find=MACRO_FIND_NAME Searches for macros with keyword or user name. -d MACRO_DELETE_NAME, --macro_delete=MACRO_DELETE_NAME Deletes specified public macro. -g, --macro_group Specify group macros for save and delete; default is user. -t TEXT_FILE, --text_file=TEXT_FILE Specify text file to load. For advanced users, you should typically cat a file into pyp. -x, --execute Execute all commands. -c, --turn_off_color Prints raw, uncolored output. -u, --unmodified_config Prints out generic PypCustom.py config file. -b BLANK_INPUTS, --blank_inputs=BLANK_INPUTS Generate this number of blank input lines; useful for generating numbered lists with variable 'n'. -n, --no_input Use with command that generates output with no input; same as --dummy_input 1. -k, --keep_false Print blank lines for lines that test as False. default is to filter out False lines from the output. -r, --rerun Rerun based on automatically cached data from the last run. Use this after executing "pyp", pasting input into the shell, and hitting CTRL-D. SEE ALSO
awk(1), grep(1), sed(1). AUTHOR
pyp was written by Toby Rosen <tobyrosen@gmail.com>. This manual page was written by Khalid El Fathi <khalid@elfathi.fr>, for the Debian project (and may be used by others). March 19, 2012 PYP(1)
All times are GMT -4. The time now is 04:43 AM.
Unix & Linux Forums Content Copyright 1993-2022. All Rights Reserved.
Privacy Policy