Gadget - OS


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Gadget - OS

Hi ,
I need to learn Linux codings , but no clear about the where to start . I'm looking to make gadget that can be useful for students . But i struggled where to start . As you know android is on linux base , planning to use it on that gadget also , but with modifications that matches the environment . Can anyone please suggest where to learn and what to learn , i'm zero in coding and programmings but exited and very much interested to learn .
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Test Your Knowledge in Computers #931
Difficulty: Medium
64-bit computer system storage allocation for timekeeping will allow them to represent dates more than 300 billion years into the future.
True or False?
CGRULES.CONF(5) 						 libcgroup Manual						   CGRULES.CONF(5)

NAME
cgrules.conf - libcgroup configuration file DESCRIPTION
cgrules.conf configuration file is used by libcgroups to define control groups to which a process belongs. The file contains a list of rules which assign to a defined group/user a control group in a subsystem (or control groups in subsystems). Rules have two formats: <user> <controllers> <destination> <user>:<process name> <controllers> <destination> Where: user can be: - a user name - a group name with @group syntax - the wildcard '*', for any user or group - '%', which is equivalent to "ditto" (useful for multi-line rules where different cgroups need to be specified for various hierarchies for a single user) process name is optional and it can be: - a process name - a full command path of a process controllers can be: - comma separated controller names (no spaces) or - * (for all mounted controllers) destination can be: - path relative to the controller hierarchy (ex. pgrp1/gid1/uid1) - following strings will get expanded %u username, uid if name resolving fails %U uid %g group name, gid if name resolving fails %G gid %p process name, pid if name not available %P pid '' can be used to escape '%' First rule which matches the criteria will be executed. Any text starting with '#' is considered as a start of comment line and is ignored. EXAMPLES
student devices /usergroup/students Student's processes in the 'devices' subsystem belong to the control group /usergroup/students. student:cp devices /usergroup/students/cp When student executes 'cp' command, the processes in the 'devices' subsystem belong to the control group /usergroup/students/cp. @admin * admingroup/ Processes started by anybody from admin group no matter in what subsystem belong to the control group admingroup/. peter cpu test1/ % memory test2/ The first line says Peter's task for cpu controller belongs to test1 control group. The second one says Peter's tasks for memory controller belong to test2/ control group. * * default/ All processes in any subsystem belong to the control group default/. Since the earliest matched rule is applied, it makes sense to have this line at the end of the list. It will put a task which was not mentioned in the previous rules to default/ control group. FILES
/etc/cgrules.conf default libcgroup configuration file SEE ALSO
cgconfig.conf (5), cgclassify (1), cgred.conf (5) BUGS
Linux 2009-03-10 CGRULES.CONF(5)

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