Questions tagged [ed]
For questions pertaining to the editor ed, a scriptable line-oriented text editor, originally written by Ken Thompson for the Unix operating system. Use this tag for questions about ed itself or questions about issues arising from using the ed editor.
69
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Problem pasting text into ed
If I paste text like this into ed:
\c 65
\s1 text that looks like this
\d Will be changed
\q1
\v 1 Nominum textum latinum
\q1\v 2 More text
I get this:
\c 65 \s1 text that looks like this \d Will ...
- 332
2
votes
2
answers
78
views
swap position of consecutive multiple lines in after pattern matching
I am trying to edit a big text file.
What I am trying to achieve is swap lines from positions between 3 and 14 to positions between 16 and 27.
I have extracted UPDATE statements from MySQL bin-logs ...
0
votes
1
answer
44
views
How to scroll backward in ed
BSD ed and GNU ed have the z command for scrolling. However, repeatedly using the z command only seems to scroll forward. Is there something similar to z that can scroll backward instead of forward?
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1
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42
views
How to enable help mode by default in ed
After starting ed, help mode can be enabled using the H command. Is there a way to enable help mode by default, so that I do not have to type H every time I use ed?
- 1,832
1
vote
1
answer
33
views
How to cancel the current input in ed
In GNU ed, is there a way to cancel the current input? For example:
$ ed myfile.txt
1234
a
Wrong speling.
Bad sentance.
At this point, I want to cancel the input. I no longer want to insert the two ...
- 1,832
1
vote
1
answer
33
views
How do I move to a line in ed without printing the line?
In GNU ed, how do I move to a line without printing it? If I want to move to line 123, I would input 123 Enter, but that would also print the contents of the line. Is there a way to not print when ...
- 1,832
9
votes
10
answers
973
views
sed : have a range finishing with the last occurrence of a pattern (greedy range)
Take the following file :
$ cat f1
stu vwx yza
uvw xyz abc
abc def ghi
def ghi jkl
ghi jkl mno
jkl mno pqr
mno pqr stu
pqr stu vwx
stu vwx yza
To print all lines from the first one containing abc to ...
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0
votes
1
answer
56
views
Marking multiple lines in ed
I've opened ed and inserted the following text:
This text
Is a
Test
However, when I attempt to mark lines 1-3 using the following command:
1,3ki
And print them with
'ip
It only prints the last ...
2
votes
2
answers
69
views
Search with line numbers in GNU Ed
I have recently begun learning ed, however I've come to the point where I need to search for text. My first attempt was ed's / command, which will show occurrences, but doesn't include line numbers. ...
2
votes
1
answer
89
views
Adding a command to break long lines into shorter ones to an ed script
I frequently have long lines in my ed document which I would like to split into separate lines of max length. I found this command which achieves this:
fold -s -w80 file
Split very long lines
I can ...
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1
vote
1
answer
56
views
Changing the case of lines in ed
Can I employ the tr command to change the case of a line or range of lines while working in ed? Or is there another way?
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0
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1
answer
39
views
How to obviate the problem of no spaces when joining lines in ed
In ed it is easy to join lines together. For example,
12,13j joins lines 12 and 13
-1,.j joins the line before to the current line
However, ed does not add a space between the joined lines,
and ...
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1
vote
2
answers
76
views
Subexpression in ed for multiple substitutions
Let's say I have a piece of text that says:
John went with Sally to the market where they bought fresh bread. There they met with Jim and dined together.
Let's say that I wanted to write a regex to ...
- 332
0
votes
2
answers
65
views
Searching for X but not Y in ed
In the editor sam, one can search for and print out the string "ed" but not "red" with this command:
,x./*\n/ g/ed v/red p
I was trying to find a way to do something similar in ed....
- 332
0
votes
1
answer
44
views
Is there a way to delete two non-juxtaposed duplicate lines in ed?
I was looking for a way to delete non-juxtaposed duplicate lines in ed such as,
ed is a terminal editor
sam is a bitmap editor
emacs is a macro editor
ed is a terminal editor
I am hoping to produce:
...
- 332
0
votes
1
answer
66
views
Paste text into sam editor from an external application
I am running the editor sam as a standalone application on Linux. I am using this version:
git clone https://github.com/9fans/plan9port plan9
So far I have not been able to figure out a way to paste ...
- 332
1
vote
1
answer
153
views
Showing line numbers by default in ed
In the ex editor, one can show line numbers by default by adding this line to a .exrc file:
set number
Is there a way to have ed start with line numbers showing by default, when lines are invoked?
- 332
2
votes
1
answer
101
views
Running an ed script from within ed
I have created a script file called "cleanup" which contains a series of regular expressions that clean up an ed file(s) of blank spaces, trailing white-space, blank lines etc. I run it as ...
- 332
1
vote
1
answer
104
views
Is there a command in ed that repeats the last command?
Is there a command in ed that repeats the last command? I know that one can repeat the last search (with //) but a command to repeat and/or edit the last command without having to retype it would be ...
- 332
1
vote
1
answer
217
views
What is the difference between Gnu Ed and the version of Ed that ships with Unix?
I was wondering is there is any functional difference between Gnu Ed and the version of Ed which ships with BSD Unix systems? I am currently using Gnu Ed 1.17 on Debian 10 but discovered this page:
...
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9
votes
2
answers
449
views
How would I replace two or more blank lines with a single blank line in Ed?
In Ed I can do a search to replace all blank lines as follows:
g/^$/d
This deletes all blank lines. But what if I wish to delete two or more blank lines and keep 1? For example:
Line 1
Line 2
Line ...
- 332
2
votes
1
answer
64
views
Why does ed start at the last line?
Why does ed start at the last instead of first line of a file?
Most of ed's behavior makes sense when you remember that it was for interacting with a printer, but not this. Since I believe it reads ...
0
votes
1
answer
125
views
Replace "),(" with "),\n(" in Linux
Hy everybody.
I have the following insert in a MySQL script file as an example that I obtained from mysqldump in Linux Ubuntu Server with no GUI.
INSERT INTO `table` VALUES (AAAA, BBBB, CCCC),(DDDD, ...
- 11
4
votes
1
answer
107
views
Why does ed support backreferences but not alternations in regular expressions?
I was looking into the history and development of regular expressions. I found the following timeline:
1956 - Kleene introduces regular expressions in his paper on nerve nets.
1964 - Brzozowsi ...
- 143
0
votes
2
answers
66
views
Line editor ed saves some filenames in single quotes followed by one space
I'm following The Unix Programming Environment exercises
and have encountered some weird issues. While going through the ed exercise, when you
just start ed, type in the exercise, then do
w poem
It ...
- 252
2
votes
1
answer
39
views
sdiff usage regaring merging changes in to an output file? How to come out of edit mode?
I tried
sdiff file1 file2 -o file3 and everything seems to be going well.
I could enter l or r to choose left or right side content in to the output file.
But for a particular change, I had to edit ...
- 554
6
votes
1
answer
160
views
How do I move the last 3 lines of a pipeline to the top of the output with ed?
I have a small AWK script that summarizes the output of another program, and I am trying to print that summary before the command itself, but I cannot figure out a good way to do it. My naive first ...
- 63
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1
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86
views
Ed: is possible to substitute between one string and another one?
This command on ed editor
/string.start/;/string.end/dp
deleted all words (not the entire line, this happen using , instead of ;) between the string.start and string.end
Is possible to replace/...
- 10.9k
1
vote
1
answer
80
views
How do I see what files were changed by the "ed" command?
I'm trying to write a script that ensures all text files end with a newline character.
When I run this command in a particular folder:
find . -exec ed -s {} <<< w \;
I get the following ...
- 781
8
votes
8
answers
3k
views
How to cut a file starting from the line in which a certain pattern occurs?
I have a gazillion files which need to be reduced in size. I found that most (not all) files have an end section which can be cut without losing information:
Data 1
Data 2
something_unimportant_here ...
- 7,487
1
vote
1
answer
65
views
How can I insert the contents of a shell command into my UNIX ed buffer?
I think I know how I can do this by writing to an external file, but I'm wondering if it's possible to directly insert the contents of a shell command into a UNIX ed buffer. I'm using GNU ed 1.15.
...
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8
votes
1
answer
243
views
How can I insert a lone dot on a line using ed's "insert" command?
How may I insert a lone dot on a line with the ed editor? Normally, a dot on a line by itself ends the insertion; can it somehow be escaped?
- 230
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1
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88
views
ed(1) adds ^M to every line of my file
I am working on automating a WordPress install. While editing wp-config.php file, I need to replace 8 lines containing put your unique phrase here with Salt generated by WordPress.org servers.
So, I ...
user377738
2
votes
2
answers
529
views
ed(1) script with multiple search/replace
Working on a question for codegolf.se, trying to do a simple text replacement.
Given a file coin.txt containing 1 word, either heads or tails
I have an ed script flip.ed as follows:
s/heads/1/n\
s/...
- 197
6
votes
2
answers
876
views
ed command: Delete from line 1 until the first blank line
I came across this code from a textbook; the book only says that 1,/^[ ]*$/d
means “Delete from line 1 until the first blank line.” What does each character specifically mean?
ed $1 << EOF
...
- 159
2
votes
3
answers
638
views
How to reverse input order?
The following code provides a backwards output when inputted as first to last, so input is required to be in reverse. How can this be flipped/reversed?
EDITED on 2019-05-23_07:52:04
(printf 'g?%s?m0\...
- 459
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2
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291
views
How to modify this `printf` code to reverse it's action?
Code below can, for example ...
[anony@mous-pc ~]$ (printf 'g?%s?m0\n' 008 006 004 002 ; printf 'wq\n') | ed -s file.txt
... take all of numbers within ...
[anony@mous-pc ~]$ cat some.txt
005
003
...
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1
vote
1
answer
64
views
How to move lines containing specific text to top of file in same order as code executed?
How to move lines containing specific text to top of file in same order as code executed?
Here is the code I have:
printf 'g?_001\|_002\|_003\|_004\|_005?m0\nwq\n' | ed -s target_file
( credit ...
- 459
1
vote
3
answers
190
views
Can I replace multiple characters in ed?
I have a text 'ab' whose content is composed of a,b letter.
I want to change a to b, b to a at once by using s command in ed.
But if I change them step by step, as you know, all the text will be ...
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3
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833
views
how to remove the empty/blank lines from files that appears as @ from vi
when I open file by vi
as
vi file
Current partition replica assignment
@
@
@
@
@
{"version":1,"partitions":[{"topic")]
@
@
@
@
@
Proposed partition reassignment configuration
but I try to delete ...
- 10.9k
1
vote
2
answers
2k
views
Where is the editor choice kept in ranger?
On a fresh ranger install I tried to open neofetch config with ranger and selected ed to see what is it. I am glad Ctrl+D worked to exit the ed, but now ranger opens all files with it. Restarting ...
- 2,234
4
votes
1
answer
130
views
ed print the next n lines as succinctly as possible
I'm trying to understand the ed DSL a little bit better because versions of it show up in other tools (e.g. sed, vim).
Using ed it is possible to print the next 4 lines using .,+4n where .,+4 is an ...
- 2,846
2
votes
1
answer
82
views
How shall I understand the different outputs by `-A` and by `-e` of diff3?
diffutils' manual says, in diff3 -A mine older yours
The ‘--show-all’ (‘-A’) option acts like the ‘-e’ option, except that it brackets conflicts, and it outputs all changes from older to yours, not ...
- 89.8k
0
votes
1
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74
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problem understaning /.*/
I have problem understanding /.*/ according to things written in books, this prints the entire line of the text. we know that. means any character, and * means zero or more occurrence of the preceding ...
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4
votes
3
answers
190
views
ed invalid address macOS
/Delete/,/endif/p
?
invalid address
/Delere/,/endif/p
?
no match
Does it mean it understands latin only?
/Dele/,/endif/p
?
invalid address
/Del/,/endif/p
?
invalid address
No, what am I doing wrong?...
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vote
2
answers
98
views
Is it possible to filter a set of lines through an external command in ed?
In ed, one can retrieve the output of a command into the current buffer by using r !COMMAND. One can also write a set of lines to the input of a command by using 1,3w !COMMAND.
However, I cannot ...
- 3,715
7
votes
7
answers
7k
views
Insert text N lines before the last line
I want to insert a new line in two lines before the last line. So if my original file is:
1
2
3
4
5
The result should be
1
2
3
New line
4
5
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7
votes
5
answers
7k
views
Display only the penultimate (second last) row of a text [duplicate]
I have a poem with an unknown number of rows and I want to display only the penultimate one. What command should I use?
- 71
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1
answer
263
views
cut and paste in ed
Can someone tell me that how we do cut and paste in ed, for example for the following question?
Write a script for ed which moves all lines starting with character # to the end of the input file?
- 41
1
vote
2
answers
557
views
why <<\END is used in ed [duplicate]
Using ed put character # to the beginning of lines 10 to 20 in file /etc/passwd.
Solution is the following
ed /etc/passwd <<\END
10,20s/^/#/
%p
Q
END
my question is that what does << ...
- 41