History often refers to the list of webpages viewed in a browser or commands used in a particular program. History is often used for undo/redo or back/forward functionality in programs of all kinds.

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202
votes
7answers
13k views

Purpose of a “mystery key” on an IBM PC 3270 keyboard

A colleague has just come into possession of a large number of IBM PC 3270 keyboards (don't ask!). These keyboards have a number of very interesting looking keys, but the one that most intrigued us ...
65
votes
6answers
6k views

What is the origin of K = 1024? [closed]

Why does the discrepancy in the number of bytes in a kilobyte exist? In some places I've seen the number 1024 (210) while in others it's 1000 (and the difference gets increasingly large with M, G, T, ...
64
votes
4answers
37k views

Chrome: remove URL from autocomplete which doesn't show up in history?

I accidentally visited gist.gihub.com (note the missing t), and now that URL auto completes each time I start typing gist.…. How can I remove this URL? I've tried removing it from my history, but ...
46
votes
4answers
59k views

How do I delete previously entered items from Google Chrome Omnibox?

Chrome's Omnibox keeps sites that I most frequently visit - and this is good. However, one of my most visited pages has its URL changed, and I want to remove this from the Chrome Omnibox suggestions, ...
38
votes
9answers
3k views

What did computers use for output before monitors?

How did the early industrial computers, such as UNIVAC, ENIAC, MARK I, etc display output before monitors existed? Did the first personal computers, like the Altair 8800 or the Simon use monitors, or ...
37
votes
10answers
2k views

What does an operating system look like without a shell?

A shell like the bash or command.com (up to Windows ME) or CMD.EXE (in later versions) provides an interface that (among other things) accepts commands from the user. What does an operating system ...
36
votes
4answers
9k views

What is the origin of the UNIX $ (dollar) prompt?

The UNIX prompt uses a $ symbol to indicate that your input is expected. I was wondering why this symbol was chosen -- if there is a reason. Dollar just seems a little unexpected. A > would have been ...
30
votes
9answers
34k views

Remove a certain line from Bash history file

How can I remove a certain line from history's database?
23
votes
11answers
79k views

How do I export the history of Skype?

Is it possible to export Skype v4 chat history into some readable plain-text format? (.txt, .xml, .html) Alternatively, is it possible to backup/restore skype chat history? (I wouldn't mind backup to ...
19
votes
6answers
1k views

How can I discard my undo history in vim?

Undo is nice to have in Vim. But sometimes, at a known good point, I want to erase my undo history - to be able to use u to undo individual changes, but only back to a certain point. (For instance, ...
17
votes
2answers
191k views

How do I clear the Recent Documents list in Windows 7? [duplicate]

Possible Duplicate: Clear cache/history in Windows 7? How do I remove the list of recent files in Windows 7? Are those files stored anywhere else?
16
votes
1answer
20k views

How to delete an URL from Chrome's Omnibox suggestions? [duplicate]

Possible Duplicate: How do I delete previously entered items from Google Chrome Omnibox? Chrome: remove URL from autocomplete which doesn't show up in history? How can I delete an URL ...
16
votes
10answers
2k views

What was the highest number of floppy disks ever used for a product? [closed]

Something I got to thinking of while sorting out a pile of driver floppies for windpws XP & 2003... Of all the software products ever released, what came on the highest number of floppy disks? ...
15
votes
4answers
61k views

Viewing the full Skype chat history

I have Skype 2.8 on Mac OS X 10.5.8. Under the the chat menu is an option called "Recent Chats". This allows me to see logs of recent chats, but not of older ones. I know the older ones are ...
15
votes
1answer
3k views

How to get infinite command history in bash?

I set export HISTSIZE=99999999999999 but is that the best way? I don't know if an overflow might occur. I'm looking for a tested, reliable way to remove command history limits.
15
votes
2answers
5k views

How can I remove OLD history from Google Chrome?

I'm working on a laptop with a modest hard drive, and 500MB is taken up with Google Chrome "History Index" and "Thumbnails" files. Some of these files are a year old. Chrome offers me the option to ...
14
votes
4answers
11k views

How can I view more of my history in Screen on Linux?

I was running scripts overnight from the command line (inside Screen on a Linux EC2 instance) and some errors that I was not tracking occurred. I want to "scroll up" or view more of the history in ...
14
votes
5answers
861 views

Is there a browser which saves history as a graph [closed]

When looking at a browsing session, one can describe this session as a graph. For example if you: went to google, searched for "cats", then went to the wikipedia article about cats, clicked back to ...
13
votes
5answers
45k views

Track kids browsing history even when they know how to clear it manually

I have a colleague with two teenage boys (yes, cue cliche's about 'I have this friend see...') He's currently having issues with them browsing pr0n and wants to do a little spying on their browsing ...
13
votes
2answers
688 views

How to prevent Bash from altering history?

If I press the Up or Down arrows on my keyboard and then modify something from my history, it's changed forever. Even if I press Ctrl-C and then try to bring it up again, it's still changed -- I've ...
12
votes
5answers
3k views

How do I see what my most used linux command are?

I would like to know which command I use the most on the command line. I would like to know so I can improve my use of the command line. If I know which command I use the most, I can then read more ...
11
votes
3answers
8k views

Deleting a specific URL suggestion in Chrome

In Firefox, I can use Shift+Delete to delete a single item from the URL history (the URL suggestions). How can I delete a specific mistyped URL item (only one) from the history in Google Chrome, so ...
11
votes
5answers
5k views

How do I keep my bash history across sessions?

I am working on a x86 target running fedora 9. Whenever I reboot it, my history returns to some state, and I do not have commands I did in the sessions before the reboot. What I have to change to ...
10
votes
2answers
13k views

Does Google Chrome sync history between computers?

I just installed Google Chrome on my Mac at work, and used it for browsing the entire day. Among other things I went looking for an adblocker, which I found. When I got back home and did the same ...
10
votes
2answers
2k views

Execute a terminal command without saving it to .bash_history on OS X?

This site says that on Linux you can add a space before a terminal command to keep it out of .bash_history. This does not seem to work for Mac OS X. Does anyone know of a way to execute a single ...
10
votes
1answer
1k views

ZSH only displaying last 16 or so commands with history. HISTSIZE & SAVEHIST are 500

In ZSH when I type history I'm only displayed the last 16 or so commands. I would like history to display all the existing commands in the history file. When I look in my .zsh_history (my history ...
10
votes
4answers
2k views

Bash history loss

I like to keep a lot of history, so I have histappend set in my .bashrc. Most of the time everything works fine, with history built up from many shells appending. However, every once and a while, I'll ...
9
votes
1answer
2k views

How was the first compiler compiled?

This has always racked my brain. Compilers compile code. I imagine that the compiler is coded. So to actually run the code for a compiler, you'd have to compile it. How was the first compiler ...
9
votes
2answers
21k views

How can I check the user command history in Unix?

I know the 'history' command give me a list of the commands I have typed into the Unix terminal. How do I see the command history for all of the users currently logged onto the system?
9
votes
3answers
1k views

PowerShell: history enhancements (readline)?

Some of the things I like in Bash and would love to know how to do in PowerShell: In Bash, I have history scrolling set up so that it only scrolls commands that begin with the same prefix as the ...
9
votes
3answers
16k views

Google Chrome address bar is slow, can't delete URLs with clock icon from history

I can't delete history items or visited webpages from Google Chrome that have the clock icon. I recently visited some websites with very long URLs with about 600,000 characters each. Ever since, ...
9
votes
4answers
2k views

Is there a directory history for bash?

Is there something like bash's reverse-search-history (Ctrl-r), but for only directories? I have some deep folder hierarchies that I want to jump to, so I'd like to use something like ...
9
votes
2answers
2k views

How do I get a similar awesome bar (from Firefox) in Chrome?

Before switching to Chrome, I always used Firefox, and I always really liked how you could type into the address bar and it would search (a fuzzy search!) for pages that were in the history that ...
8
votes
5answers
2k views

Skype chats and missed calls keep reappearing

I have Skype 4.2.0.11 on Ubuntu 12.04 I have a recurring problem that a set of skype chats and missed calls keep reappearing as notifications when I startup skype, even though I delete them every ...
8
votes
4answers
7k views

How to Set Firefox 4 to only store History for a set period of time, i.e. one day?

I want to setup Firefox 4 to only store my history for 1 day (or some other set period of time), but I can't seem to find an option to do that in the options dialog, all I can see is "Remember ...
8
votes
2answers
9k views

(reverse-i-search) in bash

I usually end up using CTRL+r for (reverse-i-search), however, sometimes I pass the command that I was looking for; if I do again a (reverse-i-search) it doesn't find it anymore. I assume that the ...
8
votes
1answer
5k views

How can I see a timestamp for when a command was executed using history?

I'd like to check at what time/date a command in bash history was executed. Is this possible?
8
votes
6answers
2k views

Where historic Linux distributions can be found?

Where one can find ancient Linux distribution installation images (ISO) such as RedHat Linux 5 (not RHEL), early versions of Mandrake Linux?
8
votes
2answers
905 views

Can I use Vim editing mode on the command line without losing recursive history search?

I'm uzing zsh and, because I'm an avid Vim user, I just switched to using Vim-style editing on the command line. (That means if I type ls foo/bar and decide I want to cd instead, I can hit Esc ^ to ...
8
votes
8answers
634 views

Per-directory bash/zsh history log files

I find I do a lot of work on a project in a set directory. Sometimes — a few months down the track — I need to redo something on that project but I can't remember what I did. I use ...
8
votes
2answers
954 views

How to set up Firefox to absolutely never to delete any history items?

Is there a way to set up Firefox in a way that it absolutely never removes any items from its history (automatically)? In the past maybe there were a 'keep all history items', then you could set it ...
7
votes
8answers
117k views

How to track websites that have been visited?

When I check my child's computer, his internet browser history is all blank. I strongly believe he deleted all the browsing history, cache and everything. Is it possible to know what websites that my ...
7
votes
4answers
19k views

Delete URL history in Google Chrome

I'm looking for a way to delete a whole URL in Google Chrome. Do I need to run some other program or can it be done in the browser itself?
7
votes
2answers
393 views

Firefox 29 - how do I delete history entries visited fewer than x times

Context: I've been using my Firefox profile for a couple of years now. My history file has become huge, naturally. I got Firefox Sync set up between my main desktop PC and my laptop. HW configs: ...
7
votes
1answer
7k views

Display Chrome full history

How do I display all of my browsing history in Google Chrome? When I press Ctrl+H I get most of the visited pages, but there are few missing as shown on following screenshot: Is there a way to get ...
7
votes
2answers
696 views

reverse history search with regular expressions

I'm looking for a tool to allow reverse incremental searching with simple regular expression (or just multiple matches) support. For example, if I want to find the command 'foo bar baz', I could do ...
7
votes
1answer
240 views

How can I get Skype-like shared history among all clients using Jabber?

Skype does this neat thing where it sends the same history (event log, message log) to all clients connected to that account. This results in exactly the same chat log on all clients, even containing ...
7
votes
3answers
3k views

How do I see a history of what I've POST-ed in Google Chrome?

I just submitted a form that included a text box, in which I had written a quite long text. In another textbox, I filled in a date in the wrong format - and instead of getting an error message, the ...
6
votes
2answers
1k views

Why do “ls” in UNIX and “dir” in DOS have different names?

Why do they have different names for the same command, listing a directory? Surely, they could have talked to each other and agreed on one common name, such as for example cd which is the same for ...
6
votes
2answers
5k views

Is there a way to export chat history in Skype 5.2.x for OS X?

I'm currently running 5.2.x on OS X 10.6.8 and I need to some deep searching of the past history in a conversation with a colleague. Skype tells me the term I'm looking for is in the long-running chat ...