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Shell Programming and Scripting
Writing a Perl Script that processes multiple files
Post 302561943 by Corona688 on Wednesday 5th of October 2011 02:36:33 PM
10-05-2011
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1. Shell Programming and Scripting
All,
I want to combine multiple files in one file.
Something like what we do on the commad line as follows ->
cat file1 file2 file3 > Main_File.
Can something like this be done in a perl script very efficiently?
Thanks,
Rahul. (1 Reply)
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Hi All,
I have encountered a problem,please help me.
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I have a script that runs on one file (at a time).
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$> perl myscript.pl filename > output
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Hi,
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Hi
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Hi
I have 100 files under file A labled 1.txt 2.txt.....100.txt(made up name)
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perl script.pl A/1.txt B/name.txt
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.......
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Summarize disk usage of each FILE, recursively for directories. Mandatory arguments to long options are mandatory for short options too. -a, --all write counts for all files, not just directories -B, --block-size=SIZE use SIZE-byte blocks -b, --bytes print size in bytes -c, --total produce a grand total -D, --dereference-args dereference FILEs that are symbolic links -h, --human-readable print sizes in human readable format (e.g., 1K 234M 2G) -H, --si likewise, but use powers of 1000 not 1024 -k like --block-size=1K -l, --count-links count sizes many times if hard linked -L, --dereference dereference all symbolic links -S, --separate-dirs do not include size of subdirectories -s, --summarize display only a total for each argument -x, --one-file-system skip directories on different filesystems -X FILE, --exclude-from=FILE Exclude files that match any pattern in FILE. --exclude=PATTERN Exclude files that match PATTERN. --max-depth=N print the total for a directory (or file, with --all) only if it is N or fewer levels below the command line argument; --max-depth=0 is the same as --summarize --help display this help and exit --version output version information and exit SIZE may be (or may be an integer optionally followed by) one of following: kB 1000, K 1024, MB 1,000,000, M 1,048,576, and so on for G, T, P, E, Z, Y. PATTERNS
PATTERN is a shell pattern (not a regular expression). The pattern ? matches any one character, whereas * matches any string (composed of zero, one or multiple characters). For example, *.o will match any files whose names end in .o. Therefore, the command du --exclude='*.o' will skip all files and subdirectories ending in .o (including the file .o itself). AUTHOR
Written by Torbjorn Granlund, David MacKenzie, Larry McVoy, and Paul Eggert. REPORTING BUGS
Report bugs to <bug-coreutils@gnu.org>. COPYRIGHT
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