Sed is a command-line stream editor for filtering and transforming text.

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6
votes
8answers
574 views

Grep rest of line…after match

I have a file containing only two lines, with the following structure: $ cat /tmp/pwpower.log 000D6F0000D34227, -114.10 000D6F0001A405C4, -130.09 The values are power values of my solar plant. ...
13
votes
6answers
592 views

Replace string containing newline in huge file

Anyone know of a non-line-based tool to "binary" search/replace strings in a somewhat memory-efficient way? See this question too. I have a +2GB text file that I would like to process similar to what ...
3
votes
4answers
83 views

Use the sed command to search text file for entries 10000 and under

I'm trying to use the sed command to search a file for all entries 10000 and under but I think this incomplete sed search string might be for entries 10000 and over: sed -n ...
1
vote
1answer
33 views

Why sed wont remove my empty lines?

Can someone PLEASE explain to me why this sed command wont remove the empty lines? sed -e 's/\r//g' -e '/^{$/d' -e '/^}$/d' -e ':begin;$!N;/^state-text: {[[:space:]]\n/s/\n//;tbegin;P;D' -e ...
2
votes
5answers
550 views

How to use the sed command to only show the first column and last column in a text file

I need some help to figure out how to use the sed command to only show the first column and last column in a text file. Here is what I have so far for column 1: cat logfile | sed 's/\|/ /'|awk ...
3
votes
4answers
311 views

How to use Sed to replace all characters before colon?

How do I replace the following string hd_ma_prod_customer_ro:*:123456789:john.doe with john.doe Basically I need to look for the last colon (:) and delete everything before and including it.
1
vote
3answers
155 views

awk for loop for each line in a file

I'm a newbie to bash scripting. I need help trying to figure out how to get loop through a text file and for every line take the fields of name , project #, and email, and replace them in a email ...
1
vote
1answer
30 views

Move data row(s) to single column while retaining row header(s)

I have reports that are generated in the following tab-delimited format: UNIT TC CC PC TCP FTX FRX HOUSE 55 65 75 85 95 105 CAR 100 200 300 400 500 600 H2 ...
3
votes
2answers
94 views

How can I derive an IPv6 address from a MAC address?

We know that we can use the MAC address to create an interface identifier, e.g. for a link-local IPv6 address which should be unique in the Network. The image shows the way to do this: My ...
1
vote
2answers
56 views

Append a column

I've trawled through here and a few other places to try and find an answer to this, but it seems so stupidly simple that no one has answered it. All I need to do is add a single value in a new column ...
1
vote
3answers
51 views

end of line in linux and mac

I am analyzing a text file looking for a path that is written after a line that starts with "output". The line is something like output xyz/mypath/ and I want to extract xyz/mypath without the ...
0
votes
3answers
665 views

Sed find/delete for a string with multiple special characters recursively

I'm having quite a bit of difficulty with a complex string. A friend's site was hacked and has since been locked down but I'm helping to clean up the mess leftover and what I need to do is the ...
1
vote
5answers
122 views

Use SED or AWK to move string to new column and row

I have a .csv file that is tab delimited and I need to move the header row information to a "new" column at the beginning and a specified numbers of rows down. Please forgive any formatting errors for ...
1
vote
2answers
78 views

Compare set of values from two files and print the output in third file in awk

Hi friends i have problem with comparing two files.I'll try my best to explain.I have two file f1 and f2 which i have to compare on basis of two sets Parameter(p) and Value(v). Basically f1 contains ...
1
vote
3answers
54 views

colourize the first part of each line

I have some chat logs like: (15:12:56) rubo77: mist migration (15:05:22) hans: ist hugo da? (15:36:13) rubo77: test (13:30:15) rubo77: what are the access data? (15:06:38) someone@jabber.ccc.de: user ...
1
vote
3answers
155 views

GREP / SED or AWK: Print entire paragraph in a file on pattern match

I have a file with hundreds of paragraphs of around 15 lines each. I need to search for a pattern, say Occurance: 1. If this pattern is found in the para, I need to print the entire paragraph. Note ...
1
vote
4answers
1k views

Using sed/awk to remove anything after first space

aaaaaaaa 09 bbbbbbbb 90 ccccccccccccccc 89 ddddd 09 Using sed/awk/replace, in the above text I want to remove anything that comes after the first space in each line. For example the output ...
1
vote
3answers
133 views

Convert all text from uppercase to lowercase and vice versa?

My question is how can I convert all text from uppercase to lowercase and vice versa? That is to change the cases of all the letters. It has to be done with a sed replacement somehow.
2
votes
2answers
68 views

Sed : Delete between the first n lines the ones with a given string in them

I have given a string and a file. I have to delete between the first 30 lines the ones having the given string. Tried something like sed -i '/pattern/1,30d' filename Yet it gives errors. More ...
4
votes
2answers
160 views

\n prints an n instead of a newline when using sed in MaxOSX

It's a general problem when I use sed but \n works when I use it outside of sed. This is one example of what I get with sed. I have the file myfile with the following content: 1 2 3 4 5 When I use ...
4
votes
6answers
137 views

sed first n occurrences result set between 2 tags / patterns

I have a big XML file and I get all occurrences between 2 tags: Here is what I do: sed -n '/<tag>/,/<\/tag>/p' file.xml And I need to filter to get only first N occurrences. I've ...
1
vote
3answers
38 views

Shell command to remove the first string that is enclosed with slashes

I need a shell command(sed or awk is preferred) to remove the string that is enclosed within the slashes. For example If my string is /some/dir/example/ then the output should be dir/example/
2
votes
1answer
54 views

sed's c command outputs current line no matter what

Here's what I do: $ echo '1 2 3' | sed -n ' x c\ test x ' test test test Is it expected behavior? I'm running gnu sed 4.2.1.
2
votes
2answers
664 views

Some UTF-8 characters not being recognized by grep or sed

Trying to determine all characters in a file. The file sample consists of: a eɪ abandon əˈbændən ability əˈbɪləti able ˈeɪbəl able ˈeɪbl abortion əˈbɔrʃən abortion əˈbɔrʃn about əˈbaʊt above əˈbʌv ...
1
vote
2answers
85 views

How to mark dates which are in the past?

From the answers I updated the question: Now, it's: $ date "+%F %H:%M" 2014-06-04 11:26 This is the input: $ cat input.txt <tr><td>2014-04-24 14:01</td><td>2014-06-04 ...
1
vote
4answers
61 views

Remove only given strings from given column?

INPUT: <tr><td>FOOBAAR</td><td>FOOO</td><td>BAAR</td><td><font style=BACKGROUND-COLOR:red>2014-02-14 ...
4
votes
7answers
321 views

How can I groups numbers in a file

I have a file with numbers in float format. I can review them via sort -rn numbers.txt | less I would like though to be able to "group" them. I.e. easily see how many are in the same range. To give an ...
6
votes
4answers
7k views

Delete range of lines above pattern with sed (or awk)

I have the following code that will remove lines with the pattern banana and 2 lines after it: sed '/banana/I,+2 d' file So far, so good! But I need it to remove 2 lines before banana, but I can't ...
2
votes
1answer
91 views

How to replace a leading zero with white space in SED?

Trying to find how to replace a leading zero with white space in SED. Attempting to get day of month and replace with space to filter some data that I am screen scraping. The code I have is as ...
2
votes
1answer
58 views

Remove all the new lines in a text file using sed [duplicate]

I would like to remove all the new lines in my text file with sed, I use this code: sed -i-o 's/\n//g' mytext.txt but nothing changes. I must be missing something... That is the content of my ...
5
votes
7answers
6k views

Using sed to convert newlines into spaces

Say I have a shell variable $string that holds some text with several newlines, e.g.: string="this is a test" I would like to convert this string into a new string new_string where all line breaks ...
0
votes
1answer
36 views

Remove given parts of a string with sed?

$ echo '<a href="mailto:NA?Subject=AB42525216 - FOOBAR bla bla - bla">NA</a>' <a href="mailto:NA?Subject=AB42525216 - FOOBAR bla bla - bla">NA</a> $ echo '<a ...
0
votes
3answers
69 views

Removing user entry from /etc/passwd

I am trying to create a sed statement to remove ftp and other users which we don't need on our Redhat 5/6 servers. I am trying to create a sed pattern so I can find for example ftp and it removes the ...
-1
votes
4answers
60 views

SED not Deleting lines

Can anyone tell me why sed fails to delete the lines containing 0 in the last column. I have used the following and nothing seems to work. sed "/0/d" sed "/ 0 /d" sed "/\t0\n/d" sed "/0\n/d" ...
0
votes
4answers
160 views

Search for a Value only in one column w.o using awk, sed, or perl

I have a file that looks like this : Marketing Ranjit Singh FULLEagles Dean Johnson Marketing Ken Whillans FULLEagles Karen Thompson Sales Peter RobertsonPARTGolden ...
0
votes
4answers
48 views

compare columns in a one file and print the count of matches

I have a CSV file that contains two columns. I want to compare the two columns and print the number of matches. file1 M,M A,M A,A M,A Expected output: If the first columns in the first row is the ...
1
vote
3answers
118 views

Returning only the portion of a line after a matching pattern (Unix)

I have a parent folder (abeps) which contains several sub folders (1,2,3....25) where output file is located, one in which - all are the same name (opt.out). In this files there is an unpredictable ...
10
votes
2answers
2k views

Differences between sed on Mac OSX and other “standard” sed?

I am having some issues in using an answer provided on this site for this question about a sed command to replace a blank line with two other lines of content, and it was brought up if the sed command ...
0
votes
1answer
28 views

sed replace misplaces slashes

I have the following code in a LaTeX file: for \emph{service} in \emph{host}.resources: for \emph{file} in \emph{host}.resources: \underline{service}.requires.add(\underline{file}) ...
2
votes
3answers
147 views

replace column of a csv file with column from another file

I have two sample files like this: $ cat file1 abc,sachin cat,kumar $ cat file2 xyz pressure $ cat file3 xyz,sachin pressure, kumar I want the first column of file1 to be replaced with file2. ...
0
votes
4answers
64 views

Print text between tags (inclusive) if certain text is found

I've got a task to extract data from several Apache servers. The task is to print out: <Directory ...> ... </Directory> where +ExecCGI is located within. Let me give an example to ...
3
votes
2answers
77 views

how to grep complex hierarcy?

I have a file as:- start apple 1 a 2 b 3 c start orange 4 a 5 b start mango 1 a start a/b/c 5 z end 4 b end 6 c end start banana 3 c end 4 d 5 e end I want the output as :- 1 apple/a 2 apple/b 3 ...
-3
votes
1answer
153 views

how to select specific range of line & count the specific occurence of the first charcter w.r.t. each unique second charcter? [closed]

Hi I have a file like this : #0 0:() 1b:cg*b 1c 0:cg xe #4 0:() 0b:cg*b xc 0:cg 1e #8 0:() 0b:cg*b xc 0:cg xe #12 1b:cg*b xc 0:cg 0e #16 xb:cg*b 1c xe #20 1:() xb:cg*b xc 1:cg 1e #24 x:() xb:cg*b xc ...
0
votes
4answers
130 views

extract value between two search patterns on same line

I have the following in a file Output.dat. I need to extract the value between dn: uid= and ,ou= dn: uid=user1,ou=Active,ou=Member,dc=domain,dc=org dn: ...
2
votes
6answers
4k views

Can sed remove 'double' newline characters?

I have a document with a lot of empty lines. How can I remove them when there are 2 or more together. I tried sed "s/\n\n//" file but it didn't work. No error.
3
votes
3answers
287 views

How do I stop sed from adding extra newline characters

I am running the following 2 sed commands. The first one adds newline characters where I want them, the second also adds newline characters where I want them, BUT also adds an extra one at the end of ...
2
votes
3answers
765 views

Change character position with sed

The file contains: dateutkfilename25012009 I want to change the position of character 16th to 17th with 18th to 19th. And then change position of character 16th to 19th with 20th to 23rd... so it ...
1
vote
1answer
65 views

What can I know about this part of code? [duplicate]

What does this part of a script do? This is a part of a scrpt in bash for j in *.* ; do cp $j ../../$name-S$i.gid/data/${j%%.*}$i.${j#*.} sed "s/$name-S/$name-S$i/" $j > ...
1
vote
1answer
40 views

Delete a matching line in a file doesn't work

So, I have this piece of a code: while read line do if [ $line = $maddr ] ; then sed -i '/${maddr}/d' mailinglist found=true ...
1
vote
2answers
88 views

Regular expression find 3 or 4 numbers

So, I have 50+ words and I have to match the numbers in them. These numbers can be 3 or 4 digit numbers. I think I tried every way there is, but nothing seems to work (I need to remember the number as ...