The issue is that you are attempting to read the same file as you are writing. You can go ahead and use the code you wrote but instead of writing to the same file, write to a temporary file and then copy it over the original file
Hi
I need to add text to the beginning of a file in the same way that cat will put file contents at the end of a file. I want to do this with many files eg
cat newtext >> /usr/home/*/*.bat
Any ideas? (2 Replies)
hey,
i would like to add a line number to the beginning like so:
red
blue
green
yellow
will be:
1=>red
2=>blue
3=>green
4=>yellowplease advise
thank u. (5 Replies)
Well here goes:
I tried to write a batch file that adds a specific fixed text to each line of an already existing text file.
for the adding text infront of each line I tried this:
for /F "delims=" %%j in (list.txt) do echo.STARTTEXT\%%j >> list.txt
for adding text after each line I... (0 Replies)
how to add value/word at the beginning of each line in a file ?
i have file number.txt and the output is below
1000
1001
1002
1003
1004
i want to add 000 at the beginning of each line, desire output is below
0001000
0001001
0001002
0001003
0001004
and so on
please advise how... (5 Replies)
how to add a text ( surya) at the beginning of a text files (so many) in folder
text file:
111111
555555
666666
result:
surya
111111
555555
666666 (3 Replies)
Hi,
I am doing something like below:
cat file1>file3and
cat file2>>file3
I wanted to check if there is a way to write a custom message(hardcoded message)something like below at the beginning of each line then PIPE delimitiation and then followed by remaining record.
cat file1... (7 Replies)
Hi,
I have a specific requirement to add text at the beginning and end of a plain text file. I tried to use "sed" with '1i' and '$a' flags but these required two separate "sed" commands separated with "|".
I am looking for some command/option to join these two in single command parameter.
... (6 Replies)
i am trying to
insert text at the beginning of every even number line
with awk
i can do it with odd number lines
with this command
awk 'NR%2{$0="some text "$0}1' filehow can i edit this command
thanks (5 Replies)
Discussion started by: bob123
5 Replies
LEARN ABOUT DEBIAN
h5jam
h5jam(1) General Commands Manual h5jam(1)NAME
h5jam - Add a user block to a HDF5 file
SYNOPSIS
h5jam -u user_block -i in_file.h5 [-o out_file.h5] [--clobber]
DESCRIPTION
h5jam concatenates a user_block file and an HDF5 file to create an HDF5 file with a user block. The user block can be either binary or
text. The output file is padded so that the HDF5 header begins on byte 512, 1024, etc.. (See the HDF5 File Format.)
If out_file.h5 is given, a new file is created with the user_block followed by the contents of in_file.h5. In this case, infile.h5 is
unchanged.
If out_file.h5 is not specified, the user_block is added to in_file.h5.
If in_file.h5 already has a user block, the contents of user_block will be added to the end of the existing user block, and the file
shifted to the next boundary. If --clobber is set, any existing user block will be overwritten.
EXAMPLE USAGE
Create new file, newfile.h5, with the text in file mytext.txt as the user block for the HDF5 file file.h5.
h5jam -u mytext.txt -i file.h5 -o newfile.h5
Add text in file mytext.txt to front of HDF5 dataset, file.h5.
h5jam -u mytext.txt -i file.h5
Overwrite the user block (if any) in file.h5 with the contents of mytext.txt.
h5jam -u mytext.txt -i file.h5 --clobber
RETURN VALUE
h5jam returns the size of the output file, or -1 if an error occurs.
CAVEATS
This tool copies all the data (sequentially) in the file(s) to new offsets. For a large file, this copy will take a long time.
The most efficient way to create a user block is to create the file with a user block (see H5Pset_user_block), and write the user block
data into that space from a program.
The user block is completely opaque to the HDF5 library and to the h5jam and h5unjam tools. The user block is simply read or written as a
string of bytes, which could be text or any kind of binary data. It is up to the user to know what the contents of the user block means
and how to process it.
When the user block is extracted, all the data is written to the output, including any padding or unwritten data.
This tool moves the HDF5 file through byte copies, i.e., it does not read or interpret the HDF5 objects.
SEE ALSO h5dump(1), h5ls(1), h5diff(1), h5import(1), gif2h5(1), h52gif(1), h5perf(1), h5unjam(1).
h5jam(1)