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Full Discussion: Unix space checking script
Homework and Emergencies Homework & Coursework Questions Unix space checking script Post 302494060 by Scott on Friday 4th of February 2011 04:52:41 PM
Old 02-04-2011
Getting there!

NR==2 isn't perfect. Some df's can output on three lines.

On Linux, using -P (the so-called "POSIX" option) would show the output on two lines.

i.e.
Code:
# ssh root@oraserv1
/ # cd /oracle
# df .
Filesystem           1K-blocks      Used Available Use% Mounted on
/dev/mapper/ora001vg-ora001lv
                       8252856   4752396   3081236  61% /oracle

/oracle # df -P .
Filesystem         1024-blocks      Used Available Capacity Mounted on
/dev/mapper/ora001vg-ora001lv   8252856   4752396   3081236      61% /oracle

tail is good. sed can also get the last line:
Code:
/oracle # df . | sed '$!d'  # from the link, search "print the last line of a file"
                       8252856   4752396   3081236  61% /oracle

And with awk, there's no need to remove the %. It'll do that for you when it know's it's a number.
Code:
$ echo 22% | awk '{print 100-$1}'  
78

 

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MAKE-JPKG(1)						      General Commands Manual						      MAKE-JPKG(1)

NAME
make-jpkg - builds Debian packages from Java binary distributions SYNOPSIS
make-jpkg [OPTION]... [FILE] DESCRIPTION
make-jpkg builds a Debian package from the given Java distribution FILE. Supported java binary distributions currently include: * Oracle (http://www.oracle.com/technetwork/java/javase/downloads) : - The J2SE Development Kit (JDK), version 6 (update >= 10), 7 - The J2SE Runtime Environment (JRE), version 6 (update >= 10), 7 - The J2SE API Javadoc, version 6 (update >= 10), 7 (Choose tar.gz archives or self-extracting archives, do _not_ choose the RPM!) The following options are recognized: --full-name NAME full name used in the maintainer field of the package --email EMAIL email address used in the maintainer field of the package --changes create a .changes file --revision add debian revision --help display help text and exit --version output version information and exit Download a supported Java RE or SDK or API tar.gz or self-extracting archive from http://www.oracle.com/technetwork/java/javase/downloads and execute make-jpkg file with the downloaded file. The program asks the user for additional information and builds a Debian binary pack- age in the current directory. The program requires about 200 MB free disk space in a temporary directory. The temporary directory defaults to /tmp but you can specify an alternate directory by setting the environment variable TMPDIR. EXAMPLE
To install Oracle(TM) 7 Standard Edition JDK, download a release - 64 bits version of update 2 from http://www.oracle.com/technet- work/java/javase/downloads/jdk-7u2-download-1377129.html in this example - and invoke make-jpkg: make-jpkg <path_to_download_directory>/jdk-7u2-linux-x64.tar.gz This generate a Debian package in the current directory, that can be installed using dpkg: dpkg -i oracle-j2sdk1.7_1.7.0+update2_amd64.deb When you're done, you can delete initial download as well as generated package: rm <path_to_download_directory>/jdk-7u2-linux-x64.tar.gz oracle-j2sdk1.7_1.7.0+update2_amd64.deb ENVIRONMENT
TMPDIR base directory used for temporary files (defaults to /tmp) J2SE_PACKAGE_FULL_NAME full name used in the maintainer field of the package; if none is supplied then the default of "Debian Java Maintainers" is used. J2SE_PACKAGE_EMAIL email address used in the maintainer field of the package; if none is supplied the default of "pkg-java-maintain- ers@lists.alioth.debian.org" is used. SEE ALSO
update-java-alternatives(1) AUTHOR
This manual page was written by Hubert Schmid <j2se-package@z42.de>. It is now maintained by the Debian Java Maintainers <pkg-java-maintainers@lists.alioth.debian.org>. January 22, 2012 MAKE-JPKG(1)
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