I am currently using a command like this to remove blank lines and lines which contain (not necessarily begin) with a #. Is there a better/simpler command?
cat /etc/apache2/default-server.conf | sed /^$/d | grep -v '#'
I have a large text file containing over 180k lines and another text file containing about 1k. I would like to remove lines in the 180k-line file that exist in the 1k-line file.
View 5 Replies View RelatedI have a file with three consecutive blank lines. I want to delete two and keep one.Also, if anyone could direct me towards a guide on regular expressions particularly as they apply to sed, I would be grateful. I am having a hell of a time figuring out the syntax.
View 8 Replies View RelatedAll I want is a command that reads one data file with several columns and prints it in another one.However, whenever the value in one specific column alters, it prints one empty line in the new file. For example, consider the file
2.54000000 2.54000000
2.54000000 2.54000000
2.54000000 2.54000000
2.54000000 2.56000000
[code]....
i have a file like this
# comments
#comments
#comments
bla bla
[code]....
i want to grep lines which do not start with # or a blank space. like
bla bla
bla bla
how do i do this? i tried grep --invert-match '^#' which gives lines not starting with # but gives me blank lines too i tried grep --invert-match '^#|^ ' which will give lines not starting with # OR not starting with blank ( which means any line including ones starting with #
I have a file "test.txt" with following data
#1
aaa
#2
bbb
#3
aaa
#4
ddd
I wanted it to be displayed as
#1
aaa
#2
bbb
#4
ddd
I used awk "'!x[$0]++' test.txt > file.new"
,but it deleted #1 also.I tried using uniq command but i didn't work.
Can anyone Please let me know is there any way to do this using shell script.
I'm trying to make a program to search for each blank line in a text archive, where blocks are separated by this blank lines. I want to write the number of the line in a new file "numblank.txt" I have this, but I think I have a problem with the "blank line" simbol.
awk '{if ($1 == /^$/) print NR }' $file1 >! numblank.tmp
where file1 is given as:
text
text
text
[code]...
I have this massive table file with some data in it and I want to replace some lines that are wrong with the correct ones that are in another table file of the same format. The wrong lines are not all together in a block but randomly distributed so I need to make a loop checking if the line is in the other file and if it is, replace it. I want to try and do it with sed or awk but I don't really know how to....
View 12 Replies View RelatedI currently can run an old swf on my Chumby 8 device by storing and using these three files on a USB plugged into the device
config
<?xml version="1.0" encoding="utf-8" ?>
- <config>
[code]...
I'm looking for a way to insert the number of lines in a file to the start of the aformentioned file. This should be simple but as I am not used to scripts in Linux, I am finding it tough going. I can find the number of lines in a file easily enough via
filesize=$(awk 'END {print NR}' $1)
but as for inserting this into the first line, i'm failing to do so. I've tried some of the other approaches on these forums but none so far have been able to do so.
I've tried:
sed '1i$filesize' $1
but sed i requires a string, not a variable so no go I've also tried:
mv "$1" "${1}.bak" 2>/dev/null || touch "${1}.bak"
cat $filesize "${1}.bak" >"$1"
but again with no luck as cat seems to need an input stream Just to recap, i want to insert a line at the start of a given file that holds the number of lines the original file has.
ie the file:
a
b
c
d
e
should become:
5
a
b
c
[code].....
I am using RHEL 5.I have a very large test file which cannot be opened in vi.The content of the file has some 8000 lines.I need to view ten lines between 5680 to 5690.How can i view these particular lines in a large file.what is command and option i need to use.
View 1 Replies View Relatedthere is a way to add line spaces when asking for user interaction in a script. For example:
Code:
SPACE
Hello what is your name?
SPACE
SPACE
So this is asking a question but has a space/empty line at the top of the screen and 2 spaces/empty lines below. I've seen it done in a bash script using for each line/space needed
Code:
echo ""
So what does perl use?
I am trying to delete any blank lines within two patterns e.g.
Address: 53 HIGH STREET Cred Id :
MYTOWN
MYCOUNTY
MM12 6MM
Pay Method : Crossed Cheque
The start of my pattern is "Cred Id" and the end is "Pay Method" and I want to delete the blank lines between county and post code. I did find the code below but it doesn't seem to change anything:
sed -ne '/Cred Id/,/Pay Method/!bp' -e '/^$/b' -e -e p ll.out
I can get it to print just the range I'm interested in by doing sed -ne '/Cred Id/,/Pay Method/p'.
I'm currently dual-booting Squeeze & Windows XP on a machine i use frequently.
In my experience on the desktop, i now see no reason to have Windows XP as a boot option, & wanted to try & avoid a full re-installation of Debian in order to remove XP (merging it's partition with / ).
I have a checklist that i put together, but wanted to be sure this was all correct before going forward.
1. Perform full back-up of all data.
2. Boot into Debian, through GUI -
System Tools > Disk Utility
- Select HDD (80GB Hard Disk)
- Select windows partition ( /dev/sda1 )
- Format /dev/sda1 to Ext4 Filsystem
3. Boot Live CD
- Use gParted to extend /dev/sda2 (was 38GB, will extend to 78GB)
4. Remove XP from the boot menu.
( Note: My ~ folder is on the same physical drive as / (same volume), but i actually store all Media on a separate physical drive which is formatted in NTFS. I plan on reinstalling XP using a virtual hard disk, & sharing that with the virtual machine.Here is a screenshot of my Disk Utility - [URL]
I would like to modify the content of a text file in Linux, in the following way:=> the file has several of these lines:./run_pest3 ./g134366.04080_0.062 x 2_d043 1 0.43 results_EC=> I want to modify all lines to be:./run_pest3 ./g134366.04080_0.062 x 2_d043 1 0.43 results_EC0.062i.e., the last number of $2 should be "attached" to the end of $7, for each line.
View 5 Replies View RelatedI have a file similar to this:
I need to print the last line for each user into a file. The resulting file should look like this:
Is there a way that AWK can match lines from $1 and then print the last line into a file?
I'm trying to output two certain fields of a very large text file to 2 very small text files. Then take those files and add all the lines together to come up with a total from each file (two totals).
Here's what I've got:
Code:
#!/bin/bash
echo "0" > /media/in.txt
echo "0" > /media/out.txt
[code]....
Breakdown: Put 0 in a text file to be drawn by respective while loops for math later
Output last 60 integers to a file for total A (new integer every minute)
Output last 60 integers to a file for total B (new integer every minute)
The two while loops are supposed to be adding the lines together. The echo commands at the end are for testing purposes, just to see the output. However, when I run this, I get the output of
Code:
0 0
Which is obviously not what it's supposed to be. Is there a more efficient way to do this or am I missing something in the script that would reset the values to "0"?
looking to delete the last 6 lines of a file with sed. figured out how to delete the last line..but i want the last six.
View 6 Replies View RelatedI need to add a line in a file before the last two lines using a script using standard linux editors like sed but i can't figure it out.
View 2 Replies View RelatedI have an old-address-list file which is having around 1500 entries. I need to convert this addresses in to a specific format.
The old-address-list file>
# cat old-address-list-file
dn: CN=Muhammad Hadhi K.M,OU=IT Dept,OU=Example Company H.O,DC=example,DC=com
cn: Muhammad Hadhi K.M
[code]....
I'm having a file with repeated particular text lines. So I need to view the file content ignoring these lines. Is there anyway I can achieve this using VI
View 2 Replies View RelatedI am facing some problem regarding deletion of a line from a text file. The file consists of the lines of type which consists of more than 6 occurrences of : character in it. The line should be deleted completely and the line next to it must be shifted up.
View 1 Replies View RelatedI have a file that contains 100 ligns, i need to write a script that read 70 lignes and redirect those 70 ligns to another files and these 70ligns have to be erased in the first file
when i write this command
head -70 somefile.txt>test.txt
or
sed -n 70p somefile.txt>test.txt
i have these 70 lines in the text.txt files
but these 70 lines have to be deleted inthe first file somefile.txt
I'd like to split a file into two, where the first file is the first two lines and the second is the remaining lines (third line to EOF).
View 2 Replies View Relatedi've got a file with sorted words - one on each line.How could it be possible to delete thouse lines that have words of length 1 or 2 (1-2 letters). I guess a good way it will be with AWK, n its fuction length(), but getting it, i dont know how to delete those very lines.
View 14 Replies View RelatedI have following contents
I want to grep "#2" and want the output as
How to using shell script?
When i want to remove particular lines containing a specific word in from entire document at a time,i am using the following command.
awk '$columnno !~/specificword/' inputfile > outputfile
But here, coulmn no is my problem, because iam having this in different columns. So i need a solution for it.
How to write such removal command without mentioning column no. , ie irrespective of column no, it has to remove all lines having that specific word.
I have a few rather large text files, and I need a way to look at the first three lines of each. Is there a way to do this using awk?
View 3 Replies View RelatedI want to delete all but 1 file and 1 directory from the directory I am currently in. How do I go about doing this?I have a directory which has three directories a, b, c and three files 1.php, 2.php, 3.php. I want to remove directories a and b, as well as files 1.php and 2.php only. I am looking for a solution to doing this in an easier manner. I am looking for a solution that could be used on a higher scale with more folders and files.
View 3 Replies View RelatedWhen i tried to log in, i get blank screen on the login page, even the src/configtest.php This can be solved by reverting whatever was edited for the motd option to its original paramater. anyone experienced this before and found a solution? The only reason for me to use php 5.2 is to install roundcube alongside squirrelmail. Using: centos 5.5 32-bit, squirrelmail 1.4.8, php 5.2
View 1 Replies View Related