The cat command that doesn't work for you is a UNIX command that would work just fine if you were executing it directly with a non-interactive shell script on any UNIX or Linux system. So, what you have told us is incorrect. We can give you an awk script that will do what cat does; we can give you a sed script that will do what cat does; we can give you a shell script that will do what cat does. But if cat doesn't work, we have absolutely no reason to think that an awk, ed, ex, more, less, sed, or shell script is going to work either.
If what you said about being able to execute the command:
and it works fine except that it doesn't process the 2nd file operand is true, put in a dummy 2nd file operand and try again:
or:
hi,
I want to append to two files into a third file without new line
like this:
file 1:
I am learning the unix
file 2:
Unix is very intersting
When I am trying cat file1 file2 >> file3
I am getting:
I am learning the unix
Unix is very interesting
But I want that to be in... (3 Replies)
I have a string that I need to append to 3 files.
Say,
$ echo "Hello"
I want to append this “Hello” to three files, file1, file2 and file3.The files are all in different directories and the file names have no common pattern.Can I do it in one line? If yes, how? :confused: (2 Replies)
Hello,
I have a some files that look like this:
0 3
1 5
2 8
3 7
I want to reverse and append the data so it looks like this:
3 7
2 8
1 5
0 3
0 3
1 5
2 8
3 7
I first thought about using cat and tac cleverly with some redirection and pipe in a one-liner but I couldn't get it to... (1 Reply)
Hello,
There is a log file A.log where new lines are getting added every minute.
When ever any new lines are getting added in to A , the same lines needs to be appended to B.log
I need to append these newly added lines to end of another file B through a shell script. I tried CAT but its... (2 Replies)
Hello,
For the input file, I am trying to split those records which have multiple values seperated by '|' in the last input field, into multiple records and each record corresponds to the common input fields + one of the value from the last field.
I was trying with an example on this forum... (4 Replies)
Hi
I have an ssh 'for' loop script to login and put a key on multiple servers. I need to append a file on each server but the command which works ok from the prompt does not work via the script. I have
cat filename | ssh user@servername "cat >>append.file.name"
I have tried to 'spawn' this in... (0 Replies)
Hi,
I have multiple files that read:
Asa.txt
Bad.txt
Gnu.txt
And I want to rename them using awk to
Asa_ddmmyytt.txt and so on
...
If there is a single command or more efficient executable please share!
Thanks! (4 Replies)
Hi All,
I am trying to append time stamp to all file with wild character.
If you look above I want take all file with wild card *001* and append current time stamp to it.
I did below code. But not sure if there is any easy way that can be done in a single step
a=date +%s
for... (3 Replies)
Hi All,
I have requirement where multiple csv files are present in a directory and each file contains a header.I need to append the contents of all the files into one file by removing header.
Once the data is merged in one file ,I need to remove duplicates on nth column to find out distinct... (2 Replies)
Hello All,
I have three input files
cat file1
col1|col2|col3
a|1|A
b|2|B
cat file2
col1|col2|col3
c|3|C
cat file3
col1|col2|col3
d|4|D
e|5|E
i want below output
file4 col1|col2
a|1 (6 Replies)
Discussion started by: looney
6 Replies
LEARN ABOUT BSD
diff3
DIFF3(1) General Commands Manual DIFF3(1)NAME
diff3 - 3-way differential file comparison
SYNOPSIS
diff3 [ -exEX3 ] file1 file2 file3
DESCRIPTION
Diff3 compares three versions of a file, and publishes disagreeing ranges of text flagged with these codes:
==== all three files differ
====1 file1 is different
====2 file2 is different
====3 file3 is different
The type of change suffered in converting a given range of a given file to some other is indicated in one of these ways:
f : n1 a Text is to be appended after line number n1 in file f, where f = 1, 2, or 3.
f : n1 , n2 c Text is to be changed in the range line n1 to line n2. If n1 = n2, the range may be abbreviated to n1.
The original contents of the range follows immediately after a c indication. When the contents of two files are identical, the contents of
the lower-numbered file is suppressed.
Under the -e option, diff3 publishes a script for the editor ed that will incorporate into file1 all changes between file2 and file3, i.e.
the changes that normally would be flagged ==== and ====3. Option -x (-3) produces a script to incorporate only changes flagged ====
(====3). The following command will apply the resulting script to `file1'.
(cat script; echo '1,$p') | ed - file1
The -E and -X are similar to -e and -x, respectively, but treat overlapping changes (i.e., changes that would be flagged with ==== in the
normal listing) differently. The overlapping lines from both files will be inserted by the edit script, bracketed by "<<<<<<" and ">>>>>>"
lines.
For example, suppose lines 7-8 are changed in both file1 and file2. Applying the edit script generated by the command
"diff3 -E file1 file2 file3"
to file1 results in the file:
lines 1-6
of file1
<<<<<<< file1
lines 7-8
of file1
=======
lines 7-8
of file3
>>>>>>> file3
rest of file1
The -E option is used by RCS merge(1) to insure that overlapping changes in the merged files are preserved and brought to someone's atten-
tion.
FILES
/tmp/d3?????
/usr/libexec/diff3
SEE ALSO diff(1)BUGS
Text lines that consist of a single `.' will defeat -e.
7th Edition October 21, 1996 DIFF3(1)