I have a file, and I have to display all the lines from the beginning of the file till a matching string is found.
I know grep with "-a", "-b" as option does exist, but it needs the number of lines to be printed in advance. eg grep -b 10 "search_string" file so it will print 10 lines before a match is found.
My problem is like this I have to delete all lines between two pattern match example- suppose below is the content of the file then i have to delete all lines between text1 and text2
...
text1
abc
def
ghi
[Code]....
I'm trying to find the correct sed syntax to match from a given pattern to the end of the file and then append that pattern to the end of the file.
I was trying:
But that prints each line right after its original occurrence. I want to match the block and then append it to the end of the file.
What is the best way to merge lines, in sed, awk or perl, that occur between certain strings? I'm new to sed scripting and I have been working on this for some time now. I have a large file (sample below) that I need to edit.
What I need looks something like this.
I'm working with a very large file so simply merging all the lines then adding a new line character before ">contig" and after "translated" won't work, at least not with sed.
I need a substitution of a particular string (StringA) with another string (StringB). However, there may be more than one occurrence of StringA within the file, but only one instance needs to be changed, which is why I'm trying to be sure of it's positioning against something I know will be unique in the file, and will always have the same distance from the string to be replaced. So, I intend to match on a string (StringC) above the string to be substituted and then have sed go to StringA below and replace with StringB.
So far, I have had some success with the following:
Code:
... but I can't help thinking that there *has* to be a cleaner way of doing it.
I'm trying to split a text file into various parts. Everything in between "123" and "break" (including linebreaks) goes into the splitted file.
e.g. using this text file:
This should split into 4 files. However I'm only getting 2 files: one for the line "123break" and one for "123 blah break". The two occurrences that contain linebreaks are being ignored. The .* part of my match should capture linebreaks seeing that I'm using the /s modifier shouldn't it? Even when I use the match /(123 break)/gs it still doesn't capture the first occurrence. I'm using Perl v5.12.3 (from ActiveState) on Windows XP. The text file is also in Windows format.
Code listed below.
The above code generates two files Output_1.txt and Output_2.txt which contain "123break" and "123 blah break" respectively. I want it to generate four files.
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 the following query:
Code:
$sql="SELECT table1.datetime, table1.user_id, table2.ip, FROM table1,table2 WHERE id='$id' AND (table1.id = table2.id AND table1.datetime = table2.datetime)";
In table2 the datetime fields are about 1 to 2 seconds off due to the source of the data, which I cannot change.
Is it possible via a query match table1.datetime & table2.datetime by HH:MM (ie. to the minute instead of to the second)?
I have to use sed with this problem, and sed is extremely complicated, they could probably teach a whole class on this entire function.
Here's an example to show what I need to do:
Code...
how would I say that every line before I reach the first match of "sweet" should be deleted so that the output will look like: Code...
I have done this before but i cant really recall now
I have a text file and i want to grep the word "interface" and 10 lines following it. I think there was some switch like grep -A or something ?
I have a file called test. It has the following contents.Code:there youI want the output to be.Code:replaced youI am trying to use the sed command to replace every occurance of "hey newline there" with "replaced". I tried the following naive apporach.Code:sed 's/heythere/replace/' testThis gives a result containing the same data as the test file.
View 3 Replies View RelatedHow do you remove parts of strings using python? Such as, if I have something like:
Code:
erme1 sdifskenklsd
erme2 sdfjksliel
[code]....
I have two files one having some transaction IDs only and sample content as follows:
Code:
SDP-DM-100755485
SDP-DM-100755504
SDP-DM-100755508
SDP-DM-100755716
[Code]....
I didn't really notice this problem until I started using my Linux Mint Laptop (Acer Aspire 5672 WLMi) to develop some software but when I look at my screen really closely there appears to be wavy horizontal lines constantly running up and down the screen.
This is a default Linux Mint machine so I'm thinking that perhaps I need to install a proper ATI video driver?
Here is some detail of the graphics adapter:
Code:
I'm looking through the Xorg logs (/var/log/xorg.0.log) and it looks like the OS is loading ATI drivers but I'm not quite sure if I'm seeing this correctly?
Code:
I'm not really sure what to do at this point. These wavy lines are getting irritating but I don't want to spin off in another direction and break my display all together if I dork something up.
From a distance the screen looks great but upon close inspection there are subtle horizontal lines constantly moving from the bottom to the top of the screen.
How awk and sed can be used to preg match strings? how would I go about matching a string like:
Code:
I think I miss something here(Ubuntu 9.10 server 64bit):
/etc/srg/srg.conf
Code:
##### SRG Example Configuration File #####
# Squid log file to process
# Defaults to access.log in the srg directory.
# e.g. log_file "/usr/local/squid/logs/access.log"
[Code].....
WARNING: Configuration file not found!
No logfile lines found to process!
I need to edit the sudo file on lots of machines. I figure the easiest way is to run a for loop to ssh to each box, sed the sudoers file to a new file & copy/move back over the top of the original (and of course, change permissions accordingly)
The problem is, I'm not sure how to add a line after a match with sed.
So if my file looks like:
Code:
I'd like it to add the new sudoer after "other" so the file looks like:
Code:
Im running Ubuntu 10.10 on an Nvidia ION gpu. I've installed the latest driver using the built in driver tool and by downloading from nvidia. Both times this has been the result at every resolution:[URL]
View 3 Replies View RelatedConsider a situation in which you want to display only specific lines of contents from a file or of a command's output. Yes, we have head and tail commands. But, how to view all the lines of a file except the last one or vise versa when we don't know the count of lines in advance?
Consider this output:
Code:
[root@localhost ~]# ps au | grep bash
root 6316 0.0 0.0 4672 1440 tty1 Ss+ Apr22 0:02 -bash
root 20847 0.2 0.0 4672 1432 pts/0 Ss Apr23 0:12 -bash
root 21167 0.0 0.0 3920 660 pts/0 S+ 01:00 0:00 grep bash
Here, I don't want the last line (in italic) to be included in the result since the last line is due to "grep bash" in the devised command "ps au | grep bash". Well, we can rewrite the devised command:
Quote:
"ps au | grep bash | head -n 2"
But, again, here we are specifying the count of lines to be included. But, in the presented problem we don't know any count in advance!
how can I display all databases and their size using command lines (linux) in a mysql server?
View 3 Replies View RelatedI'm running a find. -name pattern to find some files, and I'd like to elegantly get the total number of lines in these files. How can I achieve that?
View 4 Replies View RelatedI made an ubuntu live usb with a 2gb persistent casper rw using pendrive linux's portable installer. this works fine on most computers, but on my laptop, it boots just fine, but the screen is divided with little lines and overlaps slightly on the righr into the left(pic included). the laptop in question is an hp pavillion dv2000 special edition.
View 2 Replies View RelatedI don't seem to have an "xorg.conf" file.
Gateway SB400a computer with Edubuntu Lucid installed. The problem first cropped up when I installed the Edubuntu packages on Ubuntu. I did a fresh install with Edubuntu and the problem persists. I don't want to go back to Ubuntu since this computer is for my Grandkids and I want to the Edubuntu stuff for them.
I don't have the specs handy, but I can get them. what I have to do to get them. (it happens when you get old)
EDIT: From my xorg.0.log: (--) PCI:*(0:0:2:0) 8086:2562:107b:4000 Intel Corporation 82845G/GL[Brookdale-G]/GE Chipset Integrated Graphics Device rev 3, Mem @ 0xf0000000/134217728, 0xffa80000/524288
how I can match a literal string in awk i.e. making awk to *not* interpret the characters coressponding to its builtin operators in a given string. Take this code:
[Code]...
i have an sql table with 2 columns i run a script that randomly selects a word from the table in column 1.
the word is displayed on the screen and I guess what it means i concatenate the randomly selected word and the answer the script looks for a match in mysql if it finds a match it says "Good job!" if there is no match it will say "not correct". However when i get it right it says not correct even though when i echo the variables they look exactly the same. the script below:
#!/bin/bash
var=$(mysql translator -u root --password=*-N<<EOF
SELECT word FROM tagalog ORDER BY RAND() LIMIT 1
EOF
)
[Code]....
I have a simple program from book C++ cookbook, page 291, 8.3, Using Constructors and Destructors to manage resources (or RAII), but it can not get compiled in my g++
------------------------------------------------------------------------------------------------
// Example 8-3. Using constructors and destructors
#include <iostream>
#include <string>
using namespace std;
[code]....
I am trying to match the rss files with regex:
If I have a file here:
Code:
I want to match watever that is within the <item></item> tags and save it in the $content variable. however, the <item> tags can spread over multiple lines:
Code:
One of my application generates a text file with an XML output in it. I need to read that log files and if the output does not match to a string in couple of tags it should create a log file with the file name and the the tag name.
The two tags where the string should match is:
Identity format tag should always be JPEG , well- formed and valid status tags should be true.
sample output file:
i try do modify BASHRC and ENVIRONMENT files on directory ETCthen all the command don't work, such as:SUDO, GEDIT, NAUTILUS, NANO and some others!now i want to edit the 2 files and delete the insert lines
View 9 Replies View RelatedI got out my old Fuji Finepix s3100 and set it to web cam mode to see if anything had changed in the world of usb video drivers. Lo and behold it worked! I can watch myself on cheese web cam booth. kewl, but I wanted more. So, just recently hearing about chatroulette on the Daily Show, I click and wahla no go . After flash comes up and asks for and receives user permission to access my hardware, I click to find a random stranger, and my camera displays yellow and blue lines across its onscreen display box. I notice that movement is noticed by the camera. If I move I notice a change in background/lines. As far as I can tell, my camera is not a fault. I mean it works for local viewing. Is this a flash or possibly a chatroulette problem?
[Code]...