Questions tagged [command-history]

Questions relating to the command history features of command-line shells like Windows' CMD and Bash on Unix-based systems - features that store and deal with previously-executed shell commands.

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Command history lost

Is there a way to know if someone (including system administrators) has deleted the bash commands history on purpose? (the history -r doesn't seem to work) And is there any way to recover that history?...
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How to change command history size in putty

I use Putty for CentOS Linux and I can view my previous commands by pressing "up". I want to increase the number of previous commands that are stored. How is this done?
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99 views

Forget history position

Currently I using Bash with Cygwin. With Bash, I can enter these commands: $ date Thu, Apr 23, 2020 7:51:43 PM $ echo Sunday Sunday Then if I press Up twice, I get this, as expected: $ date If I ...
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63 views

Bash no longer writing to .bash_history after upgrading to Catalina

After upgrading to MacOS Catalina, it appears that bash no longer writes to ~/.bash_history. Instead, it seems to create a new .history_new file in ~/.bash_sessions/ for each new session. However it ...
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1answer
56 views

How to search backwards in zsh/bash BUT relative to directory

Problem: In the terminal, when I press Ctrl+R to do a backward-search using the zsh/bash history, it searches all commands sorted by most recently used. Problem is some commands are completely ...
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72 views

How many ways are there to trace a user`s login and used commands in Linux after they deleted it (somehow)?

I am looking for a way to prove that my colleague at work did some changes to a configuration file while working with me on this case and now there are consequences because of his actions. I checked ...
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1answer
31 views

History of the run command box in Ubuntu

Most Linux desktops have a dialog box that opens at the press of alt+F2 where you can run simple commands like suspend and shutdown. Where is the history of commands of this dialog box stored? I know ...
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2answers
129 views

infinite history in bash, when using multiple terminals(terminator) without losing commands and messed up order

I want infinite history, because I type a lot of commands I can forget at the spot and would like to have it stored somewhere as a reference. But by just setting HISTSIZE and HISTFILESIZE it does not ...
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1answer
38 views

How much time has passed since first command in zsh

By executing this command, ❯ fc -l -1 | awk 'END{print $1}' 8845 I can see that I have 8845 commands in my history file. And I'm using zsh, so my history file looks like this: ❯ head $HISTFILE ...
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20 views

Is it possible to log command history of weechat?

I see in the log file core.weechat.weechatlog only contains command output, not the actual command been run. Is there anyway to log command history into a log file? The reason I'm doing this is I ...
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11 views

A small mystery about commandline history in ksh

This is not a serious problem by any stretch of imagination, but I've noticed something odd about the commandline history in ksh, my preferred shell, and unfortunately I haven't yet found a way to ...
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31 views

Can't go through tcsh command history when using tmux

I'm new to tmux, but one thing that's really bugging me is that my command history has stopped working (pressing the up arrow does nothing), when using tmux. It works fine in the Mate terminal before ...
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2answers
203 views

Show sudo history in history command?

I want to show which user turns to root in history command or in logs As we have multiple users which turn to root using sudo sudo -i and we are not able to track which users turns root and runs ...
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505 views

How to have a single history from all bash terminals?

I typically have multiple bash terminals open and I would like for the commands from all terminal sessions to go into a single history file, so I can see my command history chronological order across ...
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58 views

Setting Bash history sizes to -1 clears the history

I want to save all my bash history so I set my Bash history sizes in ~/.bash_profile to negative values: export HISTSIZE=-1 export HISTFILESIZE=-1 According to the Bash reference manual, all my ...
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1answer
61 views

Command executed via ssh

On CentOS 6, how can I tell what commands were executed via someone that ssh'ed into as root? I looked in /root/.bash_history. I also ssh'ed into myself and did a history but the only commands I ...
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1answer
97 views

Custom bash client history overlap

I am writing a client for doing various tasks on the zimbra server via ssh, and I've hit a bit of a snag. Here's the code: #!/bin/bash set -e export PATH=/usr/bin:/bin:/usr/sbin:/sbin export ...
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1answer
54 views

Calling back history in bash

I am a huge fan of this magic in my .inputrc which allow me to quickly autocomplete a command with the up arrow key. "\e[A": history-search-backward "\e[B": history-search-forward "\eOA": history-...
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4answers
333 views

When I try to change the directory on Ubuntu, it won't let me

When I type in cd Desktop/Code and then press Enter, it says -bash: cd: DesktopCode: No such file or directory I do have that file in my desktop, but I'm not sure how to access it and I'm not sure ...
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1answer
79 views

Why Bash does not scan all of its own history file

I use a common history for all sessions. It happens to me frequently, that a part of the history is lost, however. Therefore, I just swap different "common session" scripts in a hope that one will fix ...
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55 views

Is there a way to preload previous commands into a cmd window without running them?

So that I can just press up and get a list of commands I would potentially wish to run?
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3answers
978 views

Why is the command history only saved on exit

I am trying to save a different history file per tab / terminal but I cannot manage to save it immediately after a command is run. The history is just saved when I run "exit". This is a problem as ...
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68 views

Wrap the history number - reset history number without losing history

I display the history number as part of my prompt, e.g., {!1123}(j:~)$ ls /some/long/and/hard/to/type/path so that I can do it later with !1123. My HISTSIZE and HISTFILESIZE are both 200, but this ...
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81 views

TAB completion with .bash_history

I usually use PageUp/PageDown to search through .bash_history given a prefix. However, I regularly catch me pressing TAB multiple times before realizing that I need to use PageUp/PageDown in this ...
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1answer
2k views

How to bring bash history to default in CentOS 7

$ set -o | grep history history on $ echo $HISTFILE /root/.bash_history $ echo $HISTSIZE 1000 $ echo $HISTFILESIZE 1000 I ran following command and ...
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183 views

Bash - history search by ordered characters subset

I want to be able to write dockercomex and have, for example, a history match: docker-compose exec (...). Searching like this works in PyCharm and it's fantastic for productivity. In Firefox it's ...
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1answer
54 views

Store SSH command history on local machine

I often use SSH to connect to ARM machine which reboots regularly and doesn't have any persistent memory to store sh command history. Is there a way to store such history on my local machine so it ...
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1answer
688 views

Why was ctrl+c chosen to kill a process? [closed]

I'm aware of why ctrl+c kills a program; I'm more interested in the history as to why "c" was chosen over other letters, given that it (apparently) has no semantic meaning. If anyone knows the ...
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1answer
158 views

How do I make . execute the last shell command in zsh?

In bash, alias .= "fc -s" works for this purpose, it does exactly what I want. But in zsh, using fc -s just outputs fc: bad option: -s. How do I make . execute the last shell command in zsh?
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3answers
1k views

How to run encryption commands on linux without shell history logging

I want to encrypt something without logging any part of the shell command to bash history. I don't want the password or any filenames or the command to appear in the shell history. How to do it using ...
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0answers
100 views

applying reverse-i-search to a file

The bash reverse-i-search (ctrl-R) is quite handy to find a command you typed a while ago. However, it only searches the history of the current terminal (which consists AFAIK of the history loaded at ...
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1k views

Bash history not working?

I'm using FreeBSD 11, and Bash as my shell. I've checked all the basics. History shows as "on" HISTFILE, HISTFILESIZE and HISTSIZE are all set with sensible values. $HISTFILE exists and has rw ...
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1answer
181 views

Replace argument N in previous command

I've recently migrated to ZSH, and I'd like to get a bit more efficient at substituting arguments in commands. Specifically, I'd like to replace argument "N" in the most recent invocation of command "...
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2answers
3k views

Why can you not sudo history?

If I want to view root's bash history, why can I not just run sudo history? when I do it says command history not found, but if I run it without the sudo it runs fine. Edit: it's a duplicate answer, ...
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1answer
3k views

Why are powershell commands named cmdlets (command lets) and what is the difference between command and command-let?

I was trying to figure out the nomenclature of calling commands in powershell as command-let (cmdlet). Why they are simply not called commands, instead (what is the difference?). I could only guess ...
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3answers
15k views

Is it possible to clear history in windows command prompt?

As the title states. When using CMD, one can press upper arrow key to retrieve old commands. Is it possible to erase the history of these commands? If so, how could one do so?
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1answer
163 views

How do I write a bash alias that replaces !$ with the previous command’s last word?

I have a script named cpodin that copies several build artifacts to another directory. Afterward, I edit SHA1SUM in the destination directory. For example: cpodin /foo/bar/baz vim !$/SHA1SUM How do ...
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1answer
128 views

Linux utility to add a command line history buffer to any executable that gets input from STDIN?

A long time I was working on a Linux setup that had a great utility to add a command line history buffer to any executable that read from stdin. So if you have a Linux executable, for example a ...
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3answers
2k views

How does the “history” command work?

Trying to understand the functionality of bash_history: /home/user# ls -a . .. .bash_history .bash_logout .bashrc .cache .profile pylabs .viminfo .Xauthority I do see a .bash_history file ...
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2answers
235 views

Is there any way to prevent the current CMD input being erased by a blank history suggestion?

In the CMD interpreter on Windows, the ↑ arrow key replaces the current input (not sure what the accurate term is) with commands in the command history; commands that have previously been executed. ...
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1answer
59 views

How to get commands before timestamps in `history` output in Bash?

I found this answer about time-stamping history for Bash. Is there any way to permute the output? In particular Number command time-stamp rather than Number time-stamp command
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1answer
214 views

Bash history corrupted after power loss

I went to the store and when I came back, I found that I had forgotten to plug in my laptop and It had died from a low battery. When I rebooted, I was surprised to find that my bash history, instead ...
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1answer
622 views

How to run previous command by history index in Windows command prompt

I want to know to how run a previous command in history by index like how it is done in Linux (i.e ![index]). Yes, F9 in cmd raises a pop up box that allows me to enter in the index, but how do I do ...
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0answers
46 views

which IP address connects to my server

For some internal reasons, several people in our company are sharing the same USERNAME when connecting to SERVER, but they connect from different clients and machines. We need to track what each IP ...
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1answer
121 views

bash: opposite of “histignore” behavior

I am looking for a way to ignore every command by default, unless I specifically want to save it in history. Ideally, saving a command should be as easy as prepending it with a space.
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1answer
84 views

Seeing actual commands typed in bash history

Is it possible to retrieve the actual commands typed in a bash history? If the command involved (for example) a history substitution or modifier, what is seen in the history is the resulting command ...
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1answer
258 views

How to log every input and output and write to file in Bash?

I am often on assignment and sometimes I forget to document my work. E.g. write down output from different one-off tools. Is there a way to automate that via .bashrc? So I open up a new shell, it ...
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1answer
155 views

Difference in cd.. and cd .. (Change Directory) [duplicate]

cd.. and cd ... Basically, they are doing the same. But, who and why thought of changing it with space or without space? Why is there space and why there isn't space between cd and two dots? C:\...
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1answer
938 views

executing history command as another user

I am confused as to why I'm having problems executing a history command as another user to return all that user's history - I need to loop though all users and get their history cat /etc/passwd | awk ...
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1answer
3k views

CTRL+R in shell - if I go past the command I want, how do I get back to it?

I'm feverishly hitting CTRL+R to find some command I used awhile ago, when suddenly I get to it. By reflex, I continue hitting CTRL+R, passing it for something further back in the shell history. How ...