Ubuntu :: Bash - Delete First File Matching Regex?
Mar 27, 2011In a bash shell script, I want to do something like this:
Code:
if [[ $(ls -ld /some/dir/foo_* | wc -l) -gt 4 ]]; then
rm -rf first_match_of /some/dir/foo_*
[code]....
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Programming :: ! For Not Matching Bash Regex?
Jan 13, 2011In a bash-script, only the case if a regular expression does not match is relevant.herefore I used the exclamation mark !. But where to place it?
These two work fine, but are they equivalent?
Code: if ! [[ $abc =~ $pattern ]]; then or
Code: if [[ ! $abc =~ $pattern ]]; then Where is the ! placed more correct?
Programming :: Delete Line In File Matching String?
Jan 26, 2010Quote:Originally Posted by topcatI would like to know how i can write a shell script to delete a line if a particular pattern exists?E.g. I have a text file with multiple lines. Say 1000s. in the following pattern.
username@email.com:149.0.3.4:1
username1@email.com:149.0.3.4:1
username1@email.net:149.0.3.4:1
username1@email.edu:149.0.3.4:1
If the patternusername@email.com exists then the line "username@email.com:149.0.3.4:1 should be deleted from the file.I have a very similar question but I need to delete one line in a file which matches one very precise instance of a string only. Let's assume I have a file composed of thousands of lines and let's call the file chap-secrets. Let's take the following sample entries:
Code:
#USERNAME SERVER PASSWORD IP
pp pptpd blahblah *
[code]....
Ubuntu :: Text Manipulation - Regex - Pattern Matching?
Jul 12, 2010Are there some good tutorials or reference materials on how do pattern matching and text manipulation in Linux?I have a few simple tasks I'd like taken care of...like formatting numbers in file names, stripping some text from directory names, etc
View 2 Replies View RelatedProgramming :: Perl Regex Matching HTML?
Mar 19, 2010I'm trying to find out how to extract the string between the 2 <title> tags: <title>this is what i want</title>.I found lots of results but nothing I've tried works.. EG:$page =~ m/<title>($.)</title>/gism;
View 2 Replies View RelatedProgramming :: Bash File Comparing - Report How Many Matching Words My Main File ?
Jun 9, 2009I have been messing with diff and grep for 2 days now without result
I am trying to match a file consisting of words to many separate other wordfiles in a specific directory. one by one.
What i want the script to do is to report how many matching words my main file has with every file in the directory, each in turn
setup:
Each of em are plain text files with 1 word per line
Output should be something like:
SCRIPT REPORT:
Ubuntu :: Matching And Returning A Part Of File Name On Bash?
Apr 25, 2011If I have files named like this:
abc_one.c
egx_two.c
tsf_two.c
[code]...
Programming :: Perl Only Matching Single-character Regex Patterns?
Jan 20, 2009I'm having a small issue with regex matching in Perl. I'm pretty certain it's a simple fix, but it all looks correct to me...
If I run the following:
Code:
It prints out all the lines containing a 'P', as one would expect. But when the regex is
Code:
I get zero lines printed. It seems to match only single-character patterns.
The file I'm reading is: (It has the same effect whether I leave it with Windows linebreaks or convert them to unix).
Code:
Programming :: Perl Regex Not Matching Across Multiple Lines Despite Ms Flags / Fix It?
Aug 16, 2010I have written a regular expression (tested in regexpal and regextester alpha something) with which I want to replace something like code...
but it only matches functions which occupy one line only, despite my tests showing multiple line matching in javascript testers online and using the m and s flags (which should make it multi line no?)
General :: Command Line - Print A Group Of Text Matching A Regex?
Sep 22, 2011I'd like to print only few groups from text matching a regex. How can I do that in the Linux command line?
What other tools for text processing are there in Linux?
Programming :: Bash - Delete Only One Line From A File?
Apr 9, 2011I would like to delete a single line from a file that contains many lines passing through the same values as the two parameters. Again, I would like to delete a single line and not all those that contain parameters. How can I make bash?
View 14 Replies View RelatedGeneral :: Delete Matching Files In All Subdirectories?
Feb 22, 2010How can I remove all .swp files in all of my subdirectories under Linux?
View 4 Replies View RelatedGeneral :: Grep Or Sed To Delete Matching Pattern?
Jul 7, 2011How can I use grep -Ev "pattern" not only to delete the matching "pattern" but to edit and save the file permanently as well
View 2 Replies View RelatedProgramming :: Sed: Delete Last Line Matching A Pattern?
Mar 27, 2011I have a question about sed programming, actually a one-liner for which I cannot find a solution, right now. I need to delete a line matching a specific pattern only if it is the last line. In practice, I would put together the following:
Code:
#
# This deletes the last line of a file
[code]...
Programming :: Bash-REGEX For Validating Computername?
Apr 3, 2011I'm writing a script to read user input for a computername.I need a check that a given userinput is valid.Right now I use grep like this (for sure not optimal):Quote:
if echo "$name" | grep -q '[^a-z][^A-Z][^0-9]'; then
echo error
else
[code]....
Programming :: BASH - Regex In A Case Statement?
Jun 9, 2010the following works and BASH doesn't complain, but VIM highlights the closing square bracket is if it sees a syntax error. Is there a better way to express regex in a case statement or is this an issue with VIM?
Code:
#!/bin/bash
case $1 in
[code]...
Programming :: Bash Regex String Extraction?
Jun 10, 2011Code:
g echo ${mm[$j]}
4 BashNotes
[code]...
General :: How To Get List Of Files Not Matching Patterns In Bash
May 4, 2011I have a file with joker character patterns:
./include/*
./src/*
etc.
From the current directory I would like to recursively get the list of files that do not match these patterns.
General :: Delete A File Named "-p" From Bash?
Jun 4, 2010How do I delete a file named -p in bash? Trying rm "-p" complains that -p is not a valid argument.
View 2 Replies View RelatedProgramming :: Matching Two Tables Of Non-matching Sizes?
Mar 2, 2011I have two table files with x (1st column) ,y (2nd column) coordinates and intensity (3rd column). I need to match these two tables and divide the intensities at the consecutive coordinates on the 3rd column. The problem is the size of the tables are not same and I want to ignore the lines if they are not in one of the other file.
Here is Table 1:
Code:
-7.500-30.00013.006
-7.500-22.50037.952
-7.500-15.00060.962
-7.500-7.50040.922
-7.5000.00014.348
code....
Ubuntu :: Move A File Matching *.ext Regardless Of Case
Jan 26, 2010how I can use the mv command to move a file that matches *.ext regardless of the case?
I would like to be able to move:
*.ext
*.EXT
*.ExT
....and so on with a single command. I do not want to have to type out all combinations of this single file extension in my script because my file system is case sensitive.
General :: Regex To Find Min / Max Length Words In File?
Jan 29, 2011i am trying to find all 3 and 4-character length words in my file (which is huge and has alot of entries in it, a big fat wordlist!).My attempt with this regular expression (which I thought should work, found something on length search here: [URL]
cat sorted_noapostrophe.txt| grep '.{3,4}'
but it returns no results? Also to find any words starting with 'f' which are between 3 and 5 characters (inclusive) long, how can this be done?
Ubuntu :: Delete File - No Right Click Delete Option?
Feb 18, 2010Why is there no Delete when I right click like there is with Windows in ubuntu? Pretty much everything else is there like new folder and so on Is there some way to add it? Also why when i delete something does it not ask me if I am sure that i want to delete that file?
View 6 Replies View RelatedGeneral :: File Matching Pattern On Command Line?
Sep 9, 2011I've got files in a directory as follows:
1.png
1_thumb.png
1-1.png
1-1_thumb.png
[code]....
I want to list all the files that don't have a copy with the same filename with -1 somewhere in it. So, in the example above, the results would be 3.png.
NB: the file and its copy with "-1" in it will be the same filesize, if that helps.
Programming :: Use Regex In Perl Script To Detect Allowed Words From The File And Then Print Output To The Screen?
Oct 4, 2010Its my first post in here so please be patient I am trying to use regex in perl script to detect allowed words from the file and then print output to the screen.
As an example : I have text file with orders and returns :
Item2-SKU-2-11.08.2010-online
Item3-SKU-3-11.09.2010-return
Item4-SKU-4-11.09.2010-store
My question: is it possible to make sure that i am ony outputing to the screen orders based on few conditions like Item,order form e.g. online.And is it possible to have multiple matches (Item2 only diplay if ordered online etc)
Ubuntu :: Bash Script To Delete/replace A Specific String Of Text?
Jun 17, 2010What i want to do is pretty simple.I want to uncomment every line that begins with "deb" (except for deb cdrom) in /etc/apt/sources.list.I know how to do this through system > administration > software sources.I know I can gksu gedit /etc/apt/sources.list.I'd rather not do it that way.I'd rather have a script do it. It's less work, less typing, less clicking, and would work the same on every ubuntu version.
View 8 Replies View RelatedGeneral :: Bash History, Delete Recurring Entries?
Jun 30, 2011Is there a way to get the bash history to delete older entries that are identical to the new one?Say the bash history would look like this normally:
Code:
cd ~
ls -l
[code]...
Programming :: Bash: Combine Arrays & Delete Duplicates?
May 23, 2011I would like to combine two arrays and delete duplicates that might occur. I tried to solve it like this:
Code:
combined=( "${results1[@]}" "${results2[@]}" )
printf "${combined[@]}" | sort -n | uniq
Example:
result1 (4 elements):
[Code]....
In my code printf seems to have a problem with elements that have the same letters but a space inbetween. For instance "new foo", "newfoo" are the same for printf
General :: Delete All Files (except The Four Newest) Throughout Directories Using A Bash Script?
Aug 16, 2011I'm looking for a Bash script that will go into a list of directories and delete all but the four most recently created files.
How can I do this?
Programming :: Delete Trailing Slashes Using Bash On-board Means?
Dec 8, 2010I prefer to delete trailing slahes from pathes. Until now I used sed:
Code: $ myPath=/home/ladygaga///
$ echo "$myPath" | sed 's//*$//'
/home/ladygaga I played around to accomplish the same with on-board means of bash without using sed, but for example this line only deletes one trailing slash:
Code: $ myPath=/home/ladygaga///
$ echo ${myPath%/*}
/home/ladygaga// Is there a way to delete trailing slahes with just on-board means of bash?
