Software :: Check The Contents Of A Text File For A Specific String And Remove It From The File From The Command Prompt?
Oct 14, 2010
I want to be able to check the contents of a text file for a specific string and remove it from the file from the command prompt. I would basically be searching through a number of files and if a specific string is found I would like it removed automatically. pretty much a find and replace, were the replace is nothing. any one got any ideas on how you would do this. I already have the search part sorted just need to be able to remove the string I don't want from the multiple files.
I am not especially cli adept so could someone tell me the best way to use the diff command to get the difference between a string of text and the contents of a file instead of between the contents of two files?
I have a text file (actually a log file from a sensor) that looks like this:
Date/Time: 10.07.01 11:03:59 00 Battery Voltage 13.5 Volt 01 Reference 71 02 Wind speed 6.68 m/s 03 Wind gust 9.3 m/s
[Code]....
I want to delete every block that is not complete. If any of the above lines (Date line or lines 00 to 08)is missing I want to completely remove the block.
First I hope to undrestand my English word because Iam Arabic girl and not so good in English...
my problem is:
I wrote code in .c file and I run that code on the prompt command, its ture but I want after the out put copy the code on the command by some statment in the code , how can I do that?
I have Ubuntu 9.10 installed on my HP desktop, but I'm running an older version (8.10) on a live CD so I can at least get online to ask for some When I tried to log on earlier it went to a command prompt and said the 'file system check failed' and to run fsck manually. I entered 'sudo fsck' at the prompt and I selected "y" to fix all the bad inodes, when it was complete it told me to restart, I then entered 'sudo restart' at the prompt and it said 'sudo uuid unknown'. I have not installed anything recently and I'm not sure what to do.
I have a file with tens of thousands of lines. I need to remove specific letters eg eggs, from every line that has the letters in it. Is there a command which can help me do that easily?
I have a line in a text file that has 40 random characters within a tag and i want to change the characters to a new set of 40 random characters (alphanumeric a-z 0-9 etc)
The line in the text file looks like this:
Quote:
How would i go about doing that?
Also second question same as the above but how would i remove them instead of replacing them?
If I have a word in a text file and I need to replace it by another word (for example, i need to replace abc by fff) so what is the command I can type it?
I've created a new group and a new user called dftp... Now I wanna do one thing... If 'dftp' connects thru ftp he should be directed to a particular location... and he shouldn't be able to see other folder except for his own including the parent folder that contains that location... I changed dftp's home folder to the location I want. However while connecting thru ftp. user dftp has been given permissions to see other folders and check out the contents of the other folders.
i am writing a script for my ubuntu server and basically i want it to download a file that i specifically type in then take that file put it in a certain folder (note file may or may not be archived so i'd have to check for that) then add the name of that file to a text file.i know sounds strange but this is what i got so far:
Code: #!/bin/bash echo "-----Star of Script-----" echo "Please enter URL:" read URL cd testdir wget $URL //extraction here + delete original archive (rar,zip,anything :S) echo name_of_file >> list.txt echo "-----End of Script-----"
I have a script that among other things generates a makefile with an error that causes make to fail. specifically, the string "-Wimplicit-function-dec" should be changed a bit to "-Wimplicit-function-declaration". Is there a way to have bash add the new eight characters in the right place (on line 105)?
Is there any way i can find a file with specific word inside it.For example if i want to find a file which has some text written inside it.How would i form a command to search them?
How to list the contents of a folder to a text file. I'm trying to list all my music, including all subfolders, etc. to a text file, but I can't remember the command.
How can read the file /var/etc/allInOne.cfg and distribute its contents on multiple cfg files using C language. /var/etc/allInOne.cfg contain the data and the path of each text file.
The source file "/var/etc/allInOne.cfg "look like this: line1 line2 ... line10 filePath:/var/etc/file1.cfg line12 line13 ... line14 filePath:/var/etc/file2.cfg linen .. filePath:/var/etc/filen.cfg the result will be :
The expected result is: /var/etc/file1.cfg will contain line1 to line10 /var/etc/file2.cfg will contain line 12 to line13 /var/etc/filen.cfg will contain linen to linen-1
I created a bash script to help me mount my network shares.However when I link the file to the desktop and dbl click on the link it asks me if I want toCode:RUN IN TERMINAL - DISPLAY - CANCEL - RUNHow can I get it to RUN IN TERMINAL each time I dbl click it?
I need to be able to convert HTML email messages saved as text files (.eml or .msg) to PDF documents, one PDF per email, retaining formatting and images.
Are there any Linux tools that will allow me to do this from the command line (so it can be scripted)?
[Syenite] RegionUUID = 8fc56fdd-0afd-4074-9432-0ae8f42b799f Location = 9992,10007 InternalAddress = 0.0.0.0 InternalPort = 9000 AllowAlternatePorts = False ExternalHostName = 71.171.21.9 What I need to do is find out what the IP address is after "ExternalHostName ="
After that I will need to compare that IP to whatismyip and if it's different then replace it but that is easy to do with sed. I just can't figure this simple hurdle out.
im tryin to make a tool in visual C++ which will take an input string through a text box,then it will compare tht string with a text file containing data and display the matched results in list box.
I am looking for a way to keep a log and make if then statements if a line exitsts in the log. I also am looking for a way to make a simple loop, like goto line number, and I also am wondering how to add/remove bits of text from a text file (plugins line in server.properties)
I am having trouble writing a script that monitors a text file. When the file contains number 1 (or any other string that is not a command) it does nothing, but when it is something different from 1, it executes that command.
So, there are 2 files: monitor.mon - this is the file that will be checked constanlty; and test.sh - the script that does the job. The monitor.mon file will have its content modified by php. This means a web page will have a form where I input commands and writes does commands in the file. Test.sh will watch when the file's content changes from character 1 to a command, execute that command and write back a 1 so it will not execute it more times.
I tried combining while and if but with no success. Tried reading the file with cat and grep -e but it doesn't seem to recognize when content changes.
I have large text files with space delimited strings (2-5). The strings can contain "'" or "-". I'd like to replace say the second space with a pipe. What's the best way to go? Using sed I was thinking of this:
