<html><head><meta http-equiv="content-type" content="text/html; charset=utf-8"></head><body dir="auto"><div></div><div>Hi,</div><div><br>On 14 Oct 2017, at 15:52, 蔡瑋倫 <<a href="mailto:alan23273850@gmail.com">alan23273850@gmail.com</a>> wrote:<br></div><blockquote type="cite"><div dir="ltr"><div>1. From the perspective of keyboard typing, "cls" is much easier to type than "clear."</div></div></blockquote><br>what is speaking against using Ctrl+L ?<div><br><blockquote type="cite"><div dir="ltr"><div>2. The corresponding command under Windows is "cls." By googling for some related materials, I have figured out that so many people asked for alias for this command.</div></div></blockquote><div><br></div><div>Everybody is free to add any desired alias. If using Ctrl+L is unpleasant, because MS DOS commands are wanted, why don't you add it yourself? Not everybody migrated from MS DOS or DR DOS to an UNIX alike operating system, some of us are native UNIX like operating system users or they used e.g. DR DOS decades ago and when migrating to Linux they learned a few basic, such as the most important shortcuts <a href="https://en.m.wikipedia.org/wiki/GNU_Readline">https://en.m.wikipedia.org/wiki/GNU_Readline</a> is providing by default.</div><div><br></div><blockquote type="cite"><div dir="ltr"><div>3. Adding alias, instead of renaming, will not affect the backward compatibility of the whole system.</div></div></blockquote><div><br></div>Emulating MS DOS commands isn't good for anything. If you migrate from one country to another, than it's wise to learn the language of the country you chose to live, instead of continuing to speak the language of the country you previously lived.</div><div><br><blockquote type="cite"><div dir="ltr"><div>ll='ls -l', or not?</div></div></blockquote><div><br></div>I don't know if this alias is a default for Ubuntu, however, while I'm using many aliases, I never ever would use 'ls -l', but other than for 'cls', there is no default shortcut for 'ls -l', this makes a big difference.</div><div><br></div><div>Regards,</div><div>Ralf</div></body></html>