$scm SCM version 5e5, Copyright (C) 1990-2006 Free Software Foundation. SCM comes with ABSOLUTELY NO WARRANTY; for details type `(terms)’. This is free software, and you are welcome to redistribute it under certain conditions; type `(terms)’ for details. ;loading /usr/share/slib/require ;done loading /usr/share/slib/require.scm ;loading /usr/share/slib/require ;done loading /usr/share/slib/require.scm ;loading /usr/lib/scm/Link ;done loading /usr/lib/scm/Link.scm ;loading /usr/lib/scm/Transcen …
Author Archives: jeffrin
What is sysctl in some Unix-like Operating systems ?
ABOUT sysctl sysctl is a software utility of some Unix-like operating systems that reads and modifies the attributes of the system kernel such as its version number, maximum limits, and security settings. It is available both as a system call for compiled programs, and an administrator command for interactive use and scripting. Linux additionally exposes …
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$convmv -t ascii Y_WD.mp3
$convmv -t ascii Y_WD.mp3 Your Perl version has fleas #37757 #49830 Starting a dry run without changes… No changes to your files done. Use –notest to finally rename the files. $convmv -t symbol Y_WD.mp3 Your Perl version has fleas #37757 #49830 Starting a dry run without changes… symbol doesn’t cover all needed characters for: “./Y_WD.mp3” …
$sudo iwatch -c "uname -r" -e all_events /etc/
jeffrin@debian:~$ mplayer romeo_must_die_.ogg $sudo iwatch -c “uname -r” -e all_events /etc/ . . . . [ 8/Jan/2012 17:19:11] IN_OPEN /etc//locale.alias [ 8/Jan/2012 17:19:11] * Command: uname -r 3.1.0-1-amd64 [ 8/Jan/2012 17:19:11] IN_ACCESS /etc//locale.alias [ 8/Jan/2012 17:19:11] * Command: uname -r 3.1.0-1-amd64 [ 8/Jan/2012 17:19:11] IN_CLOSE_NOWRITE /etc//locale.alias [ 8/Jan/2012 17:19:11] * Command: uname -r 3.1.0-1-amd64 [ …
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$sudo iwatch -e all_events /usr/lib/
$sudo iwatch -e all_events /usr/lib/ [ 7/Jan/2012 19:00:25] IN_OPEN /usr/lib//libmagic.so.1.0.0 [ 7/Jan/2012 19:00:25] IN_ACCESS /usr/lib//libmagic.so.1.0.0 [ 7/Jan/2012 19:00:25] IN_OPEN /usr/lib//libz.so.1.2.3.4 [ 7/Jan/2012 19:00:25] IN_ACCESS /usr/lib//libz.so.1.2.3.4 [ 7/Jan/2012 19:00:25] IN_CLOSE_NOWRITE /usr/lib//libz.so.1.2.3.4 [ 7/Jan/2012 19:00:25] IN_CLOSE_NOWRITE /usr/lib//libmagic.so.1.0.0 jeffrin@debian:~$ file hello-world.asp hello-world.asp: HTML document, ASCII text jeffrin@debian:~$ Related Link. http://en.wikipedia.org/wiki/Inotify
/etc/localtime .
File $ls -l /etc/localtime -rw-r–r– 1 root root 2100 Jan 5 21:49 /etc/localtime $ Explanation $file /etc/localtime /etc/localtime: timezone data, version 2, 4 gmt time flags, 4 std time flags, no leap seconds, 4 transition times, 4 abbreviation chars $ Get The Hang $hexdump /etc/localtime 0000000 5a54 6669 0032 0000 0000 0000 0000 0000 0000010 …
file command Ver 0.0001
UNIX Command $file vmlinuz-3.1.0-1-amd64 vmlinuz-3.1.0-1-amd64: Linux kernel x86 boot executable bzImage, version 3.1.0-1-amd64 (unknown@Debian) #1 SMP Tue Nov 29 13:47:12 UTC 2, RO-rootFS, swap_dev 0x2, Normal VGA $ UNIX Explanation file tests each argument in an attempt to classify it. There are three sets of tests, performed in this order: filesystem tests, magic tests, and …
Tools
1. GNU core utilities http://savannah.gnu.org/projects/coreutils 2. Miscellaneous system utilities http://userweb.kernel.org/~kzak/util-linux/ 3. utilities for making and checking MS-DOS FAT filesystems http://www.daniel-baumann.ch/software/dosfstools/ 4. Undelete utility for the ext2 file system http://e2undel.sourceforge.net 5. utilities for manipulating files in an ext2/ext3 filesystem http://home.earthlink.net/~k_sheff/sw/e2tools/index.html 6. Determines file type using “magic” numbers http://www.darwinsys.com/file/ 7. filesystem activity monitoring tool http://mytty.org/fspy 8. realtime …
ls ( -L option )
UNIX Command $ls -l vmlinuz lrwxrwxrwx 1 root root 26 Dec 1 02:44 vmlinuz -> boot/vmlinuz-3.1.0-1-amd64 $ls -lL vmlinuz -rw-r–r– 1 root root 2725680 Nov 29 19:49 vmlinuz $ UNIX Explanation -L, –dereference when showing file information for a symbolic link, show information for the file the link references rather than for the link …
stackable filesystems . Wrapfs filesystem .
Classroom. Wrapfs is a full-fledged stackable null-layer (or loopback) filesystem that simply passes all operations and objects (unmodified) between the VFS and the lower filesystem. Wrapfs itself, however, is not easy to write for one main reason; it has to treat the lower filesystem as if it were the VFS, while appearing to the real …
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