Sed stands for Stream EDitor - one of the basic tools in the POSIX environment. It processes one or more files according to an editing script and writes the results to standard output. Created in Bell Labs, it has been around since mid-70s.

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How to write a shell script to search from a position in file instead to start from beginning of the file again

I am trying to write a shell script to find value stored after a repetitive word in a big file with millions of lines using for loop. After the finding the repetitive word how i make script to start ...
41
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9answers
107k views

How to display certain lines from a text file in Linux?

I guess everyone knows the useful Linux cmd line utilities head and tail. head allows you to print the first X lines of a file, tail does the same but prints the end of the file. What is a good ...
1
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1answer
28 views

Loading Blacklist of IPs from a file into IPTABLES

In a separate file I'm creating a list of IP addresses to be blocked. This file will have IPs added in or removed on a daily basis. I want to "reference" this IP File into /etc/sysconfig/iptables, but ...
8
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4answers
13k views

Using sed to remove both an opening and closing square bracket around a string

I'm running this command in a bash shell on Ubuntu 12.04.1 LTS. I'm attempting to remove both the [ and ] characters in one fell swoop, i.e. without having to pipe to sed a second time. I know square ...
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6answers
3k views

How to recursively search and replace from command line on unix/linux system

So I want to change several files at one with one command. This is what I have so far: find -regex ".*\.ext$" | xargs grep -l searchText 2> /dev/null | xargs -i sed 's/searchText/replaceText/' >...
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6answers
196 views

Sed regexp /d deleting whole file

Given a typical known_hosts file: [123.45.67.89]:22 ssh-rsa bbuivvhbkbjdnflksndkfnksnfk... [98.76.54.32]:14444 ssh-rsa hohdibsodbfoasbfbsabdfbsd... [77.34.122.33]:32209 ssh-rsa ...
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1answer
31 views

Can't delete last empty line [duplicate]

I've a .txt file from which I'd like to delete the last, empty line. I've tried a ridiculous number of sed, perl and awk commands found on the internet, but none of them has worked. I don't know what ...
0
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1answer
31 views

sed - adding a line when it doesn't exist

I have a file formsweb.cfg which might look a little like this # These match variables (e.g. %form%) in the baseHTML file. Their values # may be overridden by specifying them in the URL query string #...
1
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1answer
17 views

Search lighttpd access log

The access-log on my lighttpd server is kind of huge, apx 5GB. Now I need to extract all data from a given date, 12th of February, from the log file and if possible save to new file. Is it possible ...
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4answers
11k views

Linux shell command to filter a text file by line length

I have a 30gb disk image of a borked partition (think dd if=/dev/sda1 of=diskimage) that I need to recover some text files from. Data carving tools like foremost only work on files with well defined ...
28
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8answers
72k views

how to find out mac addresses of all machines on network

Is there some easy way to find out mac address of all machines on my network rather than doing an SSH into each and ifconfig | grep HWaddr if there are 300 machines on network I really need some easy ...
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3answers
54 views

Matching first block of text from a file, between 2 strings

I'm trying to match only the first block of text between 2 strings: 'menuentry ' and '}' from a file as follows: Input file: (some irrelevant text) menuentry 'My Customized Linux, with Linux 3.10.0-...
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1answer
30 views

How to cut a string after a number of characters in unix? [closed]

How to delete all characters in one line after point with with sed? I have a file with multiple lines like this: 123456789 3483 98765432 56345 985745634 3469 67495735 87654 Now I want to delete ...
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1answer
18 views

sed + search word with strings and replaced all word

I want to create with sed the following: for example each word in the file that have the "ssss..." Should be replaced (all word) with target string as gggg echo "duwdbnhb ssssssmnfkejfnei" | sed s'/...
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1answer
47 views

Find and replace text (multichars) in .js files on Linux

I have many .js files named the same (got.js) where i just need to find and replace some text on them. The text to find is: \x72\x6Fx75\x6E And is to be replaced with: \x72\x6F\x75\x6E (just a \ in ...
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5answers
14k views

How to parse and convert ini file into bash array variables?

I'm trying to convert an ini file into bash array variables. The sample ini is as below: [foobar] session=foo path=/some/path [barfoo] session=bar path=/some/path so these become: session[foobar]=...
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1answer
53 views

How to use the awk,sed Modify the text?

As follows, some text 16G 16G 1.9G 40G 4G 4G 952M 60G 16G 16G 1.6G 40G 5G 780M 5G 80G I want to change all the unit from 'M' to 'G', like this 16G 16G ...
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0answers
15 views

Environment variable Name Set in Path Not converted to its set value

I created a system environment variable SD_HOME to set the location of SED application on windows server 2008 R2 Datacenter and referenced the same variable in PATH system variable as ;%SD_HOME%\bin;. ...
1
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2answers
65 views

how to get value of var in file with sed [closed]

i would like to to that : The file containe : VAR_1|VALU_1 VAR_2|VALU_2 VAR_3|VALU_31 VALU_31 VALU_33 VAR_4|VALU_4 VAR_5|VALU_5 VAR_6|VALU_61 VALU_62 VAR_7|VALU_7 ..... How can i get the value of a ...
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4answers
6k views

grep or sed to find a integer value above a given amount?

This is in reference to another question: How do I use robocopy to list all files over a certain size recursively? I would like to parse output of a command (or cat a log file) and find a string ...
0
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2answers
120 views

Prepend String using perl/awk/sed?

I'm trying to script a change to my apache config file (httpd.conf). I'm trying to match the following string: # # DirectoryIndex: sets the file that Apache will serve if a directory And PREPEND ...
0
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1answer
38 views

delete a line if it contain a particular match from a file in bash

I have a file contain lines like the following. 10 TEST NO SOMETHING 20 TEST YES SOMETHING 101 TEST YES SOMETHING 100 TEST NO SOMETHING How can I delete only the line that ...
28
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8answers
14k views

bash/sed/awk/etc remove every other newline

a bash commands outputs this: Runtime Name: vmhba2:C0:T3:L14 Group State: active Runtime Name: vmhba3:C0:T0:L14 Group State: active unoptimized Runtime Name: vmhba2:C0:T1:L14 Group State: active ...
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2answers
30k views

sed replace all tabs and spaces with a single space

I got a string like the following: test.de. 1547 IN SOA ns1.test.de. dnsmaster.test.de. 2012090701 900 1000 6000 600 now I want to replace all the tabs/spaces inbetween the ...
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3answers
2k views

sed replace unix path with variable that contain another unix path [closed]

I need to replace Unix path via sed with variable that contain another unix path in a bash script Example: another_unix_path=/another/unix/path sed -i 's/ \/some\/path\/file.txt/ '$another_unix_path'...
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2answers
216 views

how to replace one url with another using sed inplace replace in multiple files?

As you can see in the script example down there, I'm trying to find and replace (inplace replace) a string which is part of an URL with another string (url part) within ALL files found with that ...
0
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1answer
314 views

Sed - extract only parts of file with certain timestamps

I work with log files on a daily basis. I have been using sed to accomplish my goal of extracting certain lines of data between to time stamps. For example, I use: sed '/20150720 15:06:00/,/20150720 ...
1
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1answer
58 views

How to using sed to change the last character from a match line

How to using sed to change the last character from a match line ? Exemple: /etc/network/interfaces auto eth0 iface eth0 inet static address 150.0.3.50 netmask 255.255.255.0 ...
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1answer
85 views

how to get the desired value in bash shell from the lshw output?

I want to extract the info from lshw output where it says: -cpu product: ...... I want only the product info of this -cpu. How can I do that with awk or sed?
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1answer
119 views

ssh remote command execution quoting

I found this solution that works for me, but I don't understand how it does work given that the sed command encloses its own parameter in single quotes, and the whole ssh command is also passed in ...
0
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7answers
1k views

vi syntax to comment out non-commented lines (cron)

Anyone know if it's possible in vi to replace only uncommented/non-blank lines with comments? If I want to replace a commented line with something I know I can use :%s/^#/##foo##/g -- but I am ...
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2answers
1k views

Split large log file WITHOUT keeping the original (splitting in-place)

I have a 226GB log file, and I want to split it up into chunks for easier xzing. Problem is I only have 177GB of space left in my workable space. Is there a way to split a file in half or into N ...
2
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2answers
3k views

AIX sed parsing error 0602-404 but works with Linux sed?

I have this sed working in Linux and have a few AIX servers I need to use it on as well but keep getting this error and I can't find any information on it even though it's specific. Got the following ...
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0answers
48 views

Mysql sed error

I upgraded mysql from 5.5 to 5.6 in Debian 7 Wheezy box via apt-get command and all seems fine, but when I restart mysql, I get: [info] Stopping MySQL Community Server 5.6.23. ...... [info] MySQL ...
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1answer
94 views

How to substitute a string from an awk result?

I have a JSON file which contain multiple occurrence of replaceme. I only want to substitute an occurrence based on a specific string found a few line above. E.g., [...] "title" : { "...
12
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4answers
4k views

read specified range of lines from a file

I have i file that contains 100000 line how i can get the lines from line# 5555 to line# 7777 under linux. Thanks for all.
19
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6answers
54k views

How to rename multiple files by replacing word in file name?

Replace ACDC to AC-DC For example we have these files ACDC - Rock N' Roll Ain't Noise Pollution.xxx ACDC - Rocker.xxx ACDC - Shoot To Thrill.xxx I want them to become: AC-DC - ...
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1answer
669 views

How to insert text from a file into another in bash [closed]

The content in fileA is: Here’s the ip list. ip: 2.2.3.4 ip: 2.2.3.5 ip: 2.2.3.6 ip: 2.2.3.7 The content is fileB is ip: 1.2.3.4 ip: 1.2.3.5 ip: 1.2.3.6 ip: 1.2.3.7 How to use sed command or ...
4
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3answers
8k views

Regex for sed to grab multiple lines or a better way?

I'm creating a script that connects to a server and dumps the output to a tempfile. I want to use sed in the script to grab specific information from the temp file. The output would always have the 80 ...
3
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2answers
233 views

How can I use Puppet to Enforce Local Group Membership?

Cross posting this from Ask@PuppetLabs. (There simply isn't enough traffic there.) I've seen a number of examples for adding users to %wheel with Augeas. These are all variations of the same thing; ...
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3answers
655 views

Modify config file settings from bash [closed]

I need to modify a config file from a bash script, changing the values of particular settings. I need to make the change using common Linux tools (sed/awk/tr/etc.). The config file can have ...
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2answers
70 views

How to use a variable in a sedscript

I set a variable in a shell script I then call a sed script and in the sed script I use the variable That does not seem to work and I needed help on how to achieve that Following works at the ...
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2answers
265 views

Replace date in epoch (seconds) format to normal in a log file

I am on a ubuntu machine trying to read from log files and found the logs contain date and time in epoch format(seconds). How can I convert these dates in numbers into any readable format from command ...
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1answer
1k views

sed, replace in linux http://cdn1 with https://cdn1

I want to replace http://cdn1.domain.com with https://cdn1.domain.com in 200 .html files and I don't know how to do that with sed. Can somebody help me with this? sed -i '/http:/\/\cdn1/http:/\/\...
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3answers
89 views

Tinydns data file change ip with bash

I am using tinydns and need to dynamicly change some ip in data file. I want to use bash script for it. For example data file: +sub1.example.org:282.196.222.245:14400 +sub2.example.org:278.179.280....
0
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1answer
314 views

sed comand - remove virus from wordpress [duplicate]

I have malicious code in every php file. This malicius code is auto paste at the beginning of file. I want to remove this with UNIX command from console. This is malicious code: <?php $...
0
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1answer
281 views

Regex matching specific details if first match exists, multiline

I'm struggling to get the correct regex to match specifically 'Contact' and 'User-Agent' only if the 'Contact' address matches 10.0.x.x in ~70GB of SIP messages. The SIP message will always contain a ...
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1answer
2k views

sed fix for BusyBox - boot fail unable to mount LVM

BusyBox why u no vi?! Summary: Ubuntu 14.04 Server after upgrade first boot, only boots to BusyBox v1.21.1 initramfs with "gave up waiting for root device" due to missing /dev/mapper/xxx-root as ...
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0answers
52 views

SED returning error 2 when launched by Wpkg

Case I am deploying a software product using Wpkg over Windows workstations. I need to disable product's faulty automatic update and the best solution in this case is to modify one configuration file ...
4
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3answers
5k views

How can I easily convert HTML special entities from a standard input stream in Linux?

CentOS Is there an easy way to convert HTML special entities from a data stream? I'm passing data to a bash script and sometimes that data includes special entities. For example: "test" ...