omitting lines from file A that are in file B

10 More Discussions You Might Find Interesting

1. Shell Programming and Scripting

Find all lines in file such that each word on that line appears in at least n lines of the file

I have a file where every line includes four expressions with a caret in the middle (plus some other "words" or fields, always separated by spaces). I would like to extract from this file, all those lines such that each of the four expressions containing a caret appears in at least four different...

2. Shell Programming and Scripting

How to compare 2 files and create a result file with unmatched lines from first file.?

HI, I have 2 text files. file1 and file2. file1.txt (There are no duplicates in this file) 1234 3232 4343 3435 6564 6767 1213 file2.txt 1234,wq,wewe,qwqw 1234,as,dfdf,dfdf 4343,asas,sdds,dsds 6767,asas,fdfd,fdffd I need to search each number in file1.txt in file2.txt's 1st...

3. Shell Programming and Scripting

Trying to take file numbers from a file, pass them to sed to change strings in corresponding lines

I have a bunch of file numbers in the file 'test': I'm trying the above command to change all the instances of "H" to "Na+" in the file testsds.pdb at the line numbers indicated in the file 'test'. I've tried the following and various similar alternatives but nothing is working: cat test |...

4. UNIX for Dummies Questions & Answers

Add strings from one file at the end of specific lines in text file

Hello All, this is my first post so I don't know if I am doing this right. I would like to append entries from a series of strings (contained in a text file) consecutively at the end of specifically labeled lines in another file. As an example: - the file that contains the values to be...

5. Shell Programming and Scripting

Put the lines from file A to end of lines in file B

I really can't figure this one out. I have 2 files, one file is a list of hostnames and the other is a list of their corresponding IPs: fileA: example.com another.org thirdie.net fileB: 1.1.1.1 2.2.2.2 3.3.3.3 I want to create a fileC that looks like: example.com 1.1.1.1...

6. Shell Programming and Scripting

Bash script to send lines of file to new file based on Regex

I have a file that looks like this: cat includes CORP-CRASHTEST-BU e:\crashplan\ CORP-TEST /usr/openv/java /usr/openv/logs /usr/openv/man CORP-LABS_TEST /usr/openv/java /usr/openv/logs /usr/openv/man What I want to do is make three new files with just those selections. So the three...

7. Shell Programming and Scripting

Omitting sections of file that contain word

I have a configuration file that contains hundreds of these chunks. Each "chunk" is the section that begins with "define service {" and ends with "}". define service { check_command check_proc!java hostgroup_name service_description ...

8. Shell Programming and Scripting

Extract some lines from one file and add those lines to current file

hi, i have two files. file1.sh echo "unix" echo "linux" file2.sh echo "unix linux forums" now the output i need is $./file2.sh unix linux forums

9. Shell Programming and Scripting

Strings from one file which exactly match to the 1st column of other file and then print lines.

Hi, I have two files. 1st file has 1 column (huge file containing ~19200000 lines) and 2nd file has 2 columns (small file containing ~6000 lines). ################################# huge_file.txt a a ab b ################################## small_file.txt a 1.5 b 2.5 ab ...

10. Shell Programming and Scripting

Extra/parse lines from a file between unque lines through the file

I need help to parse a file where there are many records, all of which are consistently separated by lines containing �^=============� and "^ End of Report". Example: ============= 1 2 3 4 End of record ============= 1 3 4 End of record Etc.... I only need specific lines...

LEARN ABOUT DEBIAN

wall

WALL(1) 							   User Commands							   WALL(1)

NAME

     wall -- write a message to users

SYNOPSIS

     wall [-n] [-t TIMEOUT] [file]

DESCRIPTION

     Wall displays the contents of file or, by default, its standard input, on the terminals of all currently logged in users. The command will
     cut over 79 character long lines to new lines. Short lines are white space padded to have 79 characters. The command will always put carriage
     return and new line at the end of each line.

     Only the super-user can write on the terminals of users who have chosen to deny messages or are using a program which automatically denies
     messages.

     Reading from a file is refused when the invoker is not superuser and the program is suid or sgid.

OPTIONS

     -n, --nobanner
		 Supress banner

     -t, --timeout TIMEOUT
		 Write timeout to terminals in seconds. Argument must be positive integer. Default value is 300 seconds, which is a legacy from
		 time when people ran terminals over modem lines.

     -V, --version
		 Output version and exit.

     -h, --help  Output help and exit.

SEE ALSO

     mesg(1), talk(1), write(1), shutdown(8)

HISTORY

     A wall command appeared in Version 7 AT&T UNIX.

AVAILABILITY

     The wall command is part of the util-linux package and is available from ftp://ftp.kernel.org/pub/linux/utils/util-linux/.

util-linux							   April 2011								util-linux

Shell Programming and Scripting