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Hi,
How to setup up time and date in Linux. I need some command reference for that. In the same way is there a way by which can check the battery status of my laptop. What does chroot do. For which thing it i needed. And is it possible to enable ctrl + alt + del in i. I also want to reduce some disk space and speed up my system. I think this can be done via memory swapping.
To set the time, you can use the date command (date [MMDDhhmm [[CC] YY] [. Ss]]). This date command offers you to set the date and time. This can be accessed via terminal. The format lies in this way MM: month, DD: day of the month, hh: hours (24h), mm: minutes, CC: Century (19 for 1994 for example), YY: year & 2 digits. Example to set the time on June 11, 2004 at 22:46: # date 061122462004
The chroot is a mechanism to virtually change the root directory or ("/", "root") of a given directory. This particular mechanism is used to secure the system: if a hacker manages to enter a directory chroot (/ var / www /, for example), it has not provided access to "real" file system. It is also used for installation of meta-distributions such as Linux From Scratch or Gentoo.
To disable ctrl + alt + del, you need to comment out (by inserting a # in front), or delete the following line in / etc / inittab (it may differ on your system): ca::ctrlaltdel:/sbin/shutdown -t5 -rf now. It is possible to specify a different task, such as deleting a folder or something. But this is not specifically made for that. So I am not actually sure that this works.
You can do this using df (disk free). This command allows you to empty some disk space. The Linux os divides the RAM in to parts which are termed as pages. The swapping of the same is called swap space in it and the same can free up your page memory. So you can try to swap space to end some disk space. This will give more spaces and free up your system.
Using the command apm, for example: $ apm AC on-line, battery status critical: 100%. This command will show you the remaining battery in your laptop. And for the swapping thing it is necessary for two reasons. First when a system needs more physical memory and the second when the current applications need more memory support for working.