How do clear/wipe all previous lines on a terminal window?
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From: Aragorn on 27 Jan 2010 13:26 On Wednesday 27 January 2010 12:52 in comp.os.linux.misc, somebody identifying as Peter Hanke wrote... > Assume I opened a terminal window and entered a lot of commands. > > Is there a way to clear all previous input and output lines on this > terminal window? Of cause without closing and re-opening the Terminal > window. Afterwards the terminal should look like as if the terminal > had been just opened. All history lines are deleted. > > I guess there is a command like > > clr "clear" is the command to do it, but most terminals also respect the [Ctrl+L] keypress to clear the screen. Mind you, this will not clear your ".bash_history". You need... history -c .... for that. -- *Aragorn* (registered GNU/Linux user #223157)
From: Marten Kemp on 27 Jan 2010 16:19 John Gordon wrote: > In <4b6028ea$0$6582$9b4e6d93(a)newsspool3.arcor-online.net> peter_ha(a)andres.net (Peter Hanke) writes: > >> I guess there is a command like > >> clr > > There's a command called "clear" that will erase the displayed contents > of the window, but it will not remove your saved history of commands. Yeah, that fits into the "terse to the point of incomprehensibility" command scheme of *nix-ish operating systems. <grin> -- -- Marten Kemp (Fix ISP to reply) You can't help being ignorant 'cause there's always something you don't know; what you can't be is stupid.
From: Backpacker on 27 Jan 2010 16:36 Aragorn wrote: > On Wednesday 27 January 2010 12:52 in comp.os.linux.misc, somebody > identifying as Peter Hanke wrote... >> >> Is there a way to clear all previous input and output lines on this >> terminal window? > > "clear" is the command to do it, but most terminals also respect the > [Ctrl+L] keypress to clear the screen. A few people have mentioned the 'clear' command. While this command, and the Ctrl+L keypress, appear to clear the terminal window, holding down the Shift key and pressing the up arrow or PageUp key shows that the buffer hasn't been cleared - all of the previous lines are still held in the buffer and will reappear. Even a 'reset' won't clear them. And nor will 'tput clear'. I mention all this as a potential security issue. If you think that 'clear' or Ctrl+L has hidden what you were doing in the terminal, it hasn't. -- Backpacker
From: unruh on 27 Jan 2010 17:16 On 2010-01-27, Backpacker <Backpacker(a)rekcapkcaB.invalid.org> wrote: > Aragorn wrote: > >> On Wednesday 27 January 2010 12:52 in comp.os.linux.misc, somebody >> identifying as Peter Hanke wrote... >>> >>> Is there a way to clear all previous input and output lines on this >>> terminal window? >> >> "clear" is the command to do it, but most terminals also respect the >> [Ctrl+L] keypress to clear the screen. > > A few people have mentioned the 'clear' command. While this command, and the > Ctrl+L keypress, appear to clear the terminal window, holding down the Shift > key and pressing the up arrow or PageUp key shows that the buffer hasn't > been cleared - all of the previous lines are still held in the buffer and > will reappear. Even a 'reset' won't clear them. And nor will 'tput clear'. > > I mention all this as a potential security issue. If you think that 'clear' > or Ctrl+L has hidden what you were doing in the terminal, it hasn't. > It has hidden what you did on the window. Hide does not mean destroy. Anyway, rm -f ~/.bash_history and close the window should do at least part of it.
From: Allodoxaphobia on 27 Jan 2010 18:25
On Wed, 27 Jan 2010 16:19:08 -0500, Marten Kemp wrote: > John Gordon wrote: >> Peter Hanke writes: >> >>> I guess there is a command like >> >>> clr >> >> There's a command called "clear" that will erase the displayed contents >> of the window, but it will not remove your saved history of commands. > > Yeah, that fits into the "terse to the point of incomprehensibility" > command scheme of *nix-ish operating systems. <grin> heh... I still have a hard time _forgetting_ the "terse" OS/2 `cls` command, and I continue to use it even 9+ years after moving on to linux. I have `cls` set thus: alias cls='clear && echo -e "`pwd`\n"' I suppose a feller could do: alias cls='clear && history -c' for a possible solution to the OP. Jonesy -- Marvin L Jones | jonz | W3DHJ | linux 38.24N 104.55W | @ config.com | Jonesy | OS/2 * Killfiling google & XXXXbanter.com: jonz.net/ng.htm |