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Appending file(s) questions
Post 43068 by jason_v on Tuesday 11th of November 2003 01:09:45 AM
11-11-2003
Appending file(s) questions
Hey everyone,
I was just wondering if anybody knows how to do just a few things here. I am pretty sure it's possible, but I don't know exactly how it is done... Let's say I have a long file, and I want to append every other line to another file.
I know that to append the entire thing, you would do something like:
cat file1 >> file2 , it will take all the contents from file1 and add it to the end of file2. If I just wanted to do the odd line numbers, how would I do that? Would I need to pipe it to cut and/or sort or something like that? If someone could give me an idea for that, I would really appreciate it! I'm new and learning, but it's a lot of fun and I am really enjoying Unix, and I hope to continue learning more and more. Hopefully I will be able to come on here and answer newbie questions like this one day
One other question that I had here, and it is somewhat similar... How do I do an ls command where I sort the listing so that it only shows files after a certain date and bigger than a certain size in all sub-directories, all sorted by size in reverse order?
Again, if anybody could let me know anything about how to do stuff like this, I would really appreciate it!
Thanks!
Jason
I was just wondering if anybody knows how to do just a few things here. I am pretty sure it's possible, but I don't know exactly how it is done... Let's say I have a long file, and I want to append every other line to another file.
I know that to append the entire thing, you would do something like:
cat file1 >> file2 , it will take all the contents from file1 and add it to the end of file2. If I just wanted to do the odd line numbers, how would I do that? Would I need to pipe it to cut and/or sort or something like that? If someone could give me an idea for that, I would really appreciate it! I'm new and learning, but it's a lot of fun and I am really enjoying Unix, and I hope to continue learning more and more. Hopefully I will be able to come on here and answer newbie questions like this one day
One other question that I had here, and it is somewhat similar... How do I do an ls command where I sort the listing so that it only shows files after a certain date and bigger than a certain size in all sub-directories, all sorted by size in reverse order?
Again, if anybody could let me know anything about how to do stuff like this, I would really appreciate it!
Thanks!
Jason
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LEARN ABOUT ULTRIX
mv
mv(1) General Commands Manual mv(1) Name mv - move or rename files Syntax mv [-i] [-f] [-] file1 file2 mv [-i] [-f] [-] file... directory Description The command moves (changes the name of) file1 to file2. If file2 already exists, it is removed before file1 is moved. If file2 has a mode which forbids writing, prints the mode and reads the standard input to obtain a line. If the line begins with y, the move takes place. If it does not, exits. For further information, see In the second form, one or more files (plain files or directories) are moved to the directory with their original file-names. The command refuses to move a file onto itself. Options - Interprets all following arguments as file names to allow file names starting with a minus. -f Force. This option overrides any mode restrictions or the -i switch. -i Interactive mode. If a move is to supersede an existing file, the system prompts youw with the name of the file fol- lowed by a question mark. If you type a string that begins with y, the move occurs. If you type any other response, the move does not occur. Restrictions If file1 and file2 lie on different file systems, must copy the file and delete the original. In this case the owner name becomes that of the copying process and any linking relationship with other files is lost. See Also cp(1), ln(1) mv(1)