Hello All,
I have a file like this:
PART A1
PART A2
%
PART B1
PART B2
The last line in the file (PART B2) does not end with a new line. i.e <EOF> immediately follows "PART B2".
Here is my problem: I want to print everything after '%'.
So, I tried:
sed '1,/%/ d' .
This works... (6 Replies)
Hi,
I wanted to compare EDI files present in Two different Directories which can be related by the file names. While comparing the EDI files i have to skip selected segments such as "ISA" "IEA" and "GS" "GE" since this may have datetime stamp and different "Sender" "Receiver" Qual.
and... (3 Replies)
Friends,
I need help with the following in UNIX.
Merge all csv files in one folder considering only 1 header row and ignoring header of all other files.
FYI - All files are in same format and contains same headers.
Thank you (4 Replies)
Here is my dir structure:
/tmp/dave/myappend.txt
/tmp/dave/dir1/test.txt
/tmp/dave/dir2/test.txt
/tmp/dave/dir3/test.txt
/tmp/dave/dir4/test.txt
I want to append the contents of myappend.txt to the end of each file with the name "test.txt" in all dirs in /tmp/dave/
I have tried this:... (2 Replies)
How do I move all folders and its contents from a directory A to another directory B, skipping all files in Directory A ?
---------- Post updated at 12:53 PM ---------- Previous update was at 12:42 PM ----------
Ok. Got it.
mv /A/*/ /B/ (1 Reply)
// Redhat
I am running a cron with cp every 15 minutes.
cp /p2/arch/log/* /p2/bkp
What I need is to not to copy the file again if the filename already exists under /p2/bkp
The reason is that the file size under /p2/arch/log/ will be reduced (contents truncated), so I need to keep the... (10 Replies)
I am trying to match $1-$7 between the two files and if a match is found then the contents of $8 in file2 and copied over. The awk I tried is below. There is also a header row in file2 that has the Chr Start End Ref Alt that does not need to be searched. Thank you :).
awk
awk... (3 Replies)
Hi,
I have multiple files that read:
Asa.txt
Bad.txt
Gnu.txt
And I want to rename them using awk to
Asa_ddmmyytt.txt and so on
...
If there is a single command or more efficient executable please share!
Thanks! (4 Replies)
Greetings. I am working in a Linux environment and am trying to figure out a way to rename files in a directory by appending a unique strings that appears within a certain area in those files. I have gotten as far as identifying what that particular unique string is with a command like the... (10 Replies)
I've been struggling with this one for quite a while and cannot seem to find a solution for this find/replace scenario. Perhaps I'm getting rusty.
I have a file that contains a number of metrics (exactly 3 fields per line) from a few appliances that are collected in parallel. To identify the... (3 Replies)
Discussion started by: verdepollo
3 Replies
LEARN ABOUT NETBSD
cat
CAT(1) BSD General Commands Manual CAT(1)NAME
cat -- concatenate and print files
SYNOPSIS
cat [-beflnstuv] [-] [file ...]
DESCRIPTION
The cat utility reads files sequentially, writing them to the standard output. The file operands are processed in command line order. A
single dash represents the standard input, and may appear multiple times in the file list.
The word ``concatenate'' is just a verbose synonym for ``catenate''.
The options are as follows:
-b Implies the -n option but doesn't number blank lines.
-e Implies the -v option, and displays a dollar sign ('$') at the end of each line as well.
-f Only attempt to display regular files.
-l Set an exclusive advisory lock on the standard output file descriptor. This lock is set using fcntl(2) with the F_SETLKW command.
If the output file is already locked, cat will block until the lock is acquired.
-n Number the output lines, starting at 1.
-s Squeeze multiple adjacent empty lines, causing the output to be single spaced.
-t Implies the -v option, and displays tab characters as '^I' as well.
-u The -u option guarantees that the output is unbuffered.
-v Displays non-printing characters so they are visible. Control characters print as '^X' for control-X; the delete character (octal
0177) prints as '^?'. Non-ascii characters (with the high bit set) are printed as 'M-' (for meta) followed by the character for the
low 7 bits.
EXIT STATUS
The cat utility exits 0 on success, and >0 if an error occurs.
EXAMPLES
The command:
cat file1
will print the contents of file1 to the standard output.
The command:
cat file1 file2 > file3
will sequentially print the contents of file1 and file2 to the file file3, truncating file3 if it already exists. See the manual page for
your shell (i.e., sh(1)) for more information on redirection.
The command:
cat file1 - file2 - file3
will print the contents of file1, print data it receives from the standard input until it receives an EOF ('^D') character, print the con-
tents of file2, read and output contents of the standard input again, then finally output the contents of file3. Note that if the standard
input referred to a file, the second dash on the command-line would have no effect, since the entire contents of the file would have already
been read and printed by cat when it encountered the first '-' operand.
SEE ALSO head(1), hexdump(1), lpr(1), more(1), pr(1), tail(1), view(1), vis(1), fcntl(2)
Rob Pike, "UNIX Style, or cat -v Considered Harmful", USENIX Summer Conference Proceedings, 1983.
STANDARDS
The cat utility is expected to conform to the IEEE Std 1003.2-1992 (``POSIX.2'') specification.
The flags [-belnstv] are extensions to the specification.
HISTORY
A cat utility appeared in Version 1 AT&T UNIX. Dennis Ritchie designed and wrote the first man page. It appears to have been cat(1).
BUGS
Because of the shell language mechanism used to perform output redirection, the command ``cat file1 file2 > file1'' will cause the original
data in file1 to be destroyed! This is performed by the shell before cat is run.
BSD September 23, 2006 BSD