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Full Discussion: how to view last line of multiple files
Top Forums Shell Programming and Scripting how to view last line of multiple files Post 302319230 by methyl on Sunday 24th of May 2009 05:40:20 PM
Old 05-24-2009
Hre we go. I have inserted comment lines which may help. However if you see a command you need to know more about use "man <command>".

Code:
#!/bin/ksh
# The above line forces Korn Shell. It could equally be bash.
#
# ls hyphen one lists the names of files and directories in the current directory
# We have assumed that there are no directory names ending in ".txt"
# The "2>/dev/null" redirects the error channel 2 to a black hole so
# the script does not fail if we have no files in the directory.
# The next line places the list of filenames onto a pipeline for processing.
# The "\." escapes the full stop such that we definitely get a fulll stop (this is unix not MSDOS).
ls -1 *\.txt 2>/dev/null | while read filename
do
         # If there is anything in the file, show which file and the last line
         # "if -s" tests whether the file exists and has any size
         if [ -s "${filename}" ]
         then
                 # "ls -lad" lists the file and does not go deeper down a tree
                 ls -lad "${filename}"
                 # tail hyphen one shows the last line
                 tail -1 "${filename}"
                 # Just output a blank line for ease of reading the output
                 echo ""
         fi
done

Last edited by methyl; 05-24-2009 at 06:53 PM..
 

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LEARN ABOUT NETBSD

dh_install

DH_INSTALL(1)                                                        Debhelper                                                       DH_INSTALL(1)

NAME

       dh_install - install files into package build directories

SYNOPSIS

       dh_install [-Xitem] [--autodest] [--sourcedir=dir] [debhelperoptions] [file|dir...destdir]

DESCRIPTION

       dh_install is a debhelper program that handles installing files into package build directories. There are many dh_install* commands that
       handle installing specific types of files such as documentation, examples, man pages, and so on, and they should be used when possible as
       they often have extra intelligence for those particular tasks. dh_install, then, is useful for installing everything else, for which no
       particular intelligence is needed. It is a replacement for the old dh_movefiles command.

       This program may be used in one of two ways. If you just have a file or two that the upstream Makefile does not install for you, you can
       run dh_install on them to move them into place. On the other hand, maybe you have a large package that builds multiple binary packages. You
       can use the upstream Makefile to install it all into debian/tmp, and then use dh_install to copy directories and files from there into the
       proper package build directories.

       From debhelper compatibility level 7 on, dh_install will fall back to looking in debian/tmp for files, if it does not find them in the
       current directory (or wherever you've told it to look using --sourcedir).

FILES

       debian/package.install
           List the files to install into each package and the directory they should be installed to. The format is a set of lines, where each
           line lists a file or files to install, and at the end of the line tells the directory it should be installed in. The name of the files
           (or directories) to install should be given relative to the current directory, while the installation directory is given relative to
           the package build directory. You may use wildcards in the names of the files to install.

           Note that if you list exactly one filename or wildcard-pattern on a line by itself, with no explicit destination, then dh_install will
           automatically guess the destination to use, the same as if the --autodest option were used.

       debian/not-installed
           Used with the deprecated --list-missing and --fail-missing options.  Please refer to dh_missing(1) for the documentation of this file.

OPTIONS

       --list-missing
           Deprecated: Please use dh_missing --list-missing instead.  If you use this option, dh_install will call dh_missing with that option
           after it has processed all the files.  Please see dh_missing(1) for the documentation of this option.

           This option is removed in compat 12.

       --fail-missing
           Deprecated: Please use dh_missing --fail-missing instead.  If you use this option, dh_install will call dh_missing with that option
           after it has processed all the files.  Please see dh_missing(1) for the documentation of this option.

           This option is removed in compat 12.

       --sourcedir=dir
           Look in the specified directory for files to be installed.

           Note that this is not the same as the --sourcedirectory option used by the dh_auto_* commands. You rarely need to use this option,
           since dh_install automatically looks for files in debian/tmp in debhelper compatibility level 7 and above.

       --autodest
           Guess as the destination directory to install things to. If this is specified, you should not list destination directories in
           debian/package.install files or on the command line. Instead, dh_install will guess as follows:

           Strip off debian/tmp (or the sourcedir if one is given) from the front of the filename, if it is present, and install into the dirname
           of the filename. So if the filename is debian/tmp/usr/bin, then that directory will be copied to debian/package/usr/. If the filename
           is debian/tmp/etc/passwd, it will be copied to debian/package/etc/.

       file|dir ... destdir
           Lists files (or directories) to install and where to install them to.  The files will be installed into the first package dh_install
           acts on.

LIMITATIONS

       dh_install cannot rename files or directories, it can only install them with the names they already have into wherever you want in the
       package build tree.

       However, renaming can be achieved by using dh-exec with compatibility level 9 or later.  An example debian/package.install file using dh-
       exec could look like:

        #!/usr/bin/dh-exec
        debian/default.conf => /etc/my-package/start.conf

       Please remember the following three things:

       o   The package must be using compatibility level 9 or later (see debhelper(7))

       o   The package will need a build-dependency on dh-exec.

       o   The install file must be marked as executable.

SEE ALSO

       debhelper(7)

       This program is a part of debhelper.

AUTHOR

       Joey Hess <joeyh@debian.org>

11.1.6ubuntu2                                                       2018-05-10                                                       DH_INSTALL(1)
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