recall commands previously typed in a shell or other utility

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2
votes
1answer
520 views

Commands run when terminal is open do not appear in history

I have the simple following terminal.sh script: #bin/bash --login str=(--tab --title="Test" -e "bash --login -c 'echo history';bash") gnome-terminal "${str[@]}" exit 0 I basically use it to open a ...
0
votes
1answer
296 views

openSuse, linux, chmod to change link's permisions

I am trying to change the permissions for the link. I want the "Other" entity to have only the read permission, but when I run the command the permissions are not changing. Is there something I am not ...
3
votes
3answers
1k views

How to set the number of commands history recalls

I am using bash. To browse my command history I am calling the history command which I believe is calling the Gnu program of the same name. (I don't know if there's a better bash specific way). In ...
2
votes
1answer
218 views

Duplicates in history file even after HISTCONTROL specified

I am using cygwin with bash (on Windows 7 pro). I have the following in .bashrc: # Don't put duplicate lines in the history. export HISTCONTROL="ignoredups" and the following in .bash_profile: # ...
3
votes
1answer
507 views

Why does the history command do nothing in a script file?

If I create a file containing #!/bin/bash history and run it, I get no output. Running it manually in a terminal or sourceing the script file does produce output. Why does history not work from ...
0
votes
1answer
3k views

where does history timestamp stored before i enable it

I tried to set timestamp for history. My first attempt was do export EXTENDED_HISTORY=ON command, and it seems like doesn't work. Then i do echo 'export HISTTIMEFORMAT="%d.%m.%y %T "' >> /etc/...
2
votes
3answers
907 views

How can I get the last line number of unique commands when grepping my history file?

I rely on my history file for previous commands, especially ones that are long with many parameters. Once I find the command and its line number(nn) I use !nn to run it. I prefer to see the full ...
2
votes
1answer
172 views

How to use quick substitution to replace all the strings of the previous command? [duplicate]

I know I can replace a string of the previous command using ^old^new. But it seems to only replace the first occurrences as I do the follow: $ cat /proc/5742/task/5742/status ... $ ^5742^2839 cat /...
7
votes
7answers
2k views

Find out what command I last ran that starts a certain way?

On bash commandline environment, you can do !! to rerun your last command. And you can press up arrow to see the the last command you ran. But what if you want to only see but not run the last command ...
4
votes
1answer
543 views

Why do piping and redirection work differently with here documents?

Combining a redirect with a here document seems logical enough: $ bash > foo <<EOF echo Hello EOF $ less foo Hello But with a pipe it behaves differently: $ bash | tee foo <<EOF ...
23
votes
2answers
2k views

^x^y unix trick for all instances in last command?

One of my favorite Unix tricks is ^x^y, which will take the last command and replace the first instance of "x" with "y". However, I'm wondering if a similar trick works to replace all instances of "x" ...
8
votes
3answers
2k views

Why does bash have a HISTCONTROL=ignorespace option?

Or to phrase it differently, why would you want to prevent commands from being written to the bash history? (Inspired by a related question.)
20
votes
1answer
1k views

Why is bash not storing commands that start with spaces?

If I perform a sequence of commands like: $ ls $ grep abc file.txt and then use the up arrow key to get the previous one, the terminal will show the last cmd (which is the grep here) But if I do ...
0
votes
1answer
50 views

Using !n in script or interactive mode

I add to ~/.bashrc the following code: test_exclamation () { printf %s "$READLINE_LINE" | xargs echo } bind -x '"\eX": test_exclamation' I write to bash prompt buffer $ !1700 If I press Enter, ...
3
votes
3answers
1k views

Copy command from history to bash prompt

Sometimes I'd like to get some command from history output, copy it to bash prompt, make some changes and run it. Is there a way to copy command from a history output to bash prompt without involving ...
5
votes
2answers
2k views

“history” stops working when run inside bash script

I am writing a simple script to grep my bash history to find a particular string. On the command line, I can do the following, which works fine: history | grep git However, when I create a bash ...
1
vote
1answer
158 views

Unable to make .zhistory a symbolic link

Every time I try to make my Zsh history file (.zhistory file) a symbolic link to a file (previously existing .zhistory file) that lives in another folder, Zsh deletes the symbolic link and makes it a ...
27
votes
1answer
19k views

Command history in Zsh

How does Zsh keep track of command history? I see two files in my home directory: .zhistory and .zsh_history. What is the difference between them? The files seem to contain all of my history. Does ...
5
votes
0answers
1k views

Changing HISTTIMEFORMAT leaves entries with incorrect date [duplicate]

After exporting HISTTIMEFORMAT='%F %T' I tried to query history But the result shows all the commands are executed on same day. How can I check the actual date and time of actual command execution?
2
votes
3answers
108 views

How to start first command from the list printed by command 'history | grep something'

For example, I have the following output from command: loom@loom:$ history | grep MAKE 219 ../build.sh -DCMAKE_BUILD_TYPE=Debug .. 909 history | grep MAKE How to write a command, that start ...
3
votes
1answer
2k views

Root complete history commands

Where can I get root's history except besides .sh_history? I've gotten some information but only from .sh_history and the history command.
5
votes
1answer
643 views

How to get a history entry to properly display on multiple lines

Suppose I have entered a function at the bash prompt, on multiple lines rather than squeezing it onto one with semicolons: $ function blah { echo blah } $ history -1 12690 function blah {\necho ...
3
votes
2answers
652 views

Bash's declare -p HISTIGNORE brings bash to a halt! Why?

Executing the following code in GNU bash, Version 4.2.45(1)-release (x86_64-redhat-linux-gnu), Fedora 19 ... shopt -s extglob export HISTIGNORE="!(+(!([[\:space\:]]))+([[\:space\:]])+(!([[\:space\:]])...
0
votes
1answer
252 views

Where does bash store the time commands were executed?

Enabling history to display time via export HISTTIMEFORMAT='%F %T ' shows the times of the commands but .bash_history doesn't contain any times. Where does bash store the times the commands were ...
3
votes
1answer
366 views

Search Alt+F2 history in Cinnamon desktop environment

I wonder if there's some way to search the Alt+F2 "runner" history most preferably within the dialog itself. I know that in Cinnamon the values are available in dconf-editor under org.cinnamon command-...
7
votes
2answers
2k views

Re-execute fc command from history

Sometimes I am using the fc builtin in bash (3.2 if that matters), to recall commands from the history. This also offers the possibility to edit, before execution. For example, by typing fc 23 27 ...
5
votes
4answers
3k views

How can I recall a numbered history command for edit?

I frequently search for changes with history | grep 'string' I get a list of commands in my history, along with the history line number), e.g. history | grep 'git' 755 git status 1535 git push ...
5
votes
2answers
605 views

Why does !! inside an alias not work?

I have this alias set in my system /etc/bashrc file: alias root="sudo !!" The intention of this being to run the last used command using sudo of course. When used, it of course appears to ...
12
votes
1answer
5k views

datetime stamp when running history command in zsh shell

When I run the history command on my ubuntu server, I get output as follows: history ... 25 cd ~ 26 ls -a 27 vim /etc/gitconfig 28 vim ~/.gitconfig I want to view the datetime ...
3
votes
2answers
184 views

Is it possible to transfer the history of commands from one system to another?

I am going to have all my data transferred to a new PC. Is it possible to transfer the command history of the previous Linux to the new system as well? So that when I type the history command, I get ...
3
votes
0answers
334 views

How to create a bash command which creates output that exactly mimics a source text file that can be pasted into bash shell where histexpand is on?

The goal is to create a bash one line command that can be copied and pasted - for instance published on a web forum - and then patches files. See it as a way to distribute a patch file by copy and ...
2
votes
1answer
3k views

Automatically save bash command history in screen session [duplicate]

I connect to a screen session. After doing some stuff I detach it. Then in history | tail I only see screen -r and previous commands and not the commands run in screen session. Basically history shows ...
0
votes
2answers
97 views

How to find by what means a software has been installed on linux

I have plenty of softwares installed on my Linux machine (RHEL) and some were installed with yum, some other by downloading a rpm and executed it from gnome file manager. I also have few softwares ...
1
vote
3answers
132 views

Terminal: Use different command on previous file

I know that there is the !! command to reuse the previous command. How would one reuse the file or directory specified in the previous command but use a different command on it? Example: I want to ...
6
votes
2answers
7k views

HISTTIMEFORMAT modification. In /etc/bash.rc or /etc/profile? [duplicate]

I'd like to add the date/time to the output of the history command in CentOS/RHEL 6. I would like this to apply to all users on the machine by default. This itself is easy. It seems to just be a case ...
17
votes
5answers
9k views

How can I search history with what is already entered at the prompt in zsh?

In zsh, I know that I can search history with Ctrl+r. However, oftentimes I start to type a command directly at the prompt, but then realize I should be searching history. When I hit Ctrl+r, it brings ...
15
votes
4answers
2k views

Search for a previous command with the same prefix when I press Up at a shell prompt

Coming from a FreeBSD world I wish to make the Linux terminal behave like FreeBSD one, especially the 9.1 version, basically when you type cd in the terminal and push the "up" arrow you can browse all ...
0
votes
2answers
107 views

Why must you be careful when using Bash's built in command history function to re-run previous commands that contain variables?

I know !! re-runs commands but what exactly would occur if I re-ran a command that had a variable in the command?
2
votes
1answer
589 views

Get the last executed command line in ksh

Is there a way to get the last executed command possibly together with the arguments within a ksh script? I am using mksh with cygwin. I tried fc -nl -1, but the script throws a "“fc: history ...
15
votes
2answers
488 views

bash_history: comment out dangerous commands: `#`

To prevent logging "dangerous" commands in bash history, I have added following line to my .bashrc file: HISTIGNORE='rm *:mv *:cp *:cat*>*:pv*>*' this works well, but it has a side effect: I ...
3
votes
2answers
144 views

How to show last command with expanding function in bash

I'm using function like this. $ find-grep () { find . -type f -name "$1" -print0 | xargs -0 grep "$2" ; } After I type: $ find-grep *.c foo I want to get expanded last command string. In this ...
9
votes
1answer
972 views

What could cause my bash history to be cleared unexpectedly?

Today I noticed that my bash history is cleared completely. I have neither executed history -c nor deleted the .bash_history file. Apart from deleting the .bash_history file and history -c, how can ...
4
votes
1answer
444 views

Preserve tcsh history in multiple terminal windows

How can we preserve or maintain the same history across multiple terminals? The same question, but for bash shell , were discussed in the below link Preserve bash history in multiple terminal ...
21
votes
2answers
904 views

What does !$ mean?

I'm following through a tutorial and it mentions to run this command: sudo chmod 700 !$ I'm not familiar with !$. What does it mean?
4
votes
2answers
120 views

Why do I see different versions of bash history for the same user

I ssh into my servers using root. Sometimes when I scroll back in my history, I see a history from an earlier session, but not the last session. Why does this happen with the same user account? Is ...
2
votes
2answers
4k views

HISTTIMEFORMAT does not show correct date and time for history

After exporting HISTTIMEFORMAT='%F %T' I tried to query history But the result shows all the commands are executed on same day. How can I check the actual date and time of actual command execution?
1
vote
2answers
172 views

Specifying numeric ranges in zsh history

According to the docs I can tell the zsh history to print lines in a range. The docs say "history [first [last]]" I've tried "history a b" but that gives a too many arguments error. I've also tried ...
1
vote
2answers
278 views

shell saves ip address that you ping? [duplicate]

I was once shown a shortcut that I can't recall/ find. After pinging an ip, then attempting to ssh into it - the ip was saved into to a variable automagically. Something like: ping 10.1.23.4 ...
14
votes
5answers
709 views

Use same arguments with different command [duplicate]

Here's something I find myself doing often: less super/long/file/name Followed by: vim super/long/file/name Is there an easy way to pass the args of the previous command over to the next? SO I'd ...
11
votes
2answers
13k views

How can you log every command typed

How can you log every command someone has entered into the shell? I'm asking on both the basis of protecting yourself if you are logged into someone else's server and something breaks, or if someone ...