0
votes
0answers
21 views

What does !$ mean exactly? [duplicate]

echo !$ outputs different strings depending on my previous command line call. For example: mrdumbdumb-redhat:~ mrdumbdumb$ ls mrdumbdumb-redhat:~ mrdumbdumb$ echo !$ echo ls ls ...
7
votes
2answers
244 views

Is there a shortcut for repeat the second proximate command in bash?

We all know that !! can repeat the last command you do in bash. But sometimes we need to do some operation like $ python test.py $ vim test.py $ python test.py # here is where I need to repeat the ...
1
vote
3answers
45 views

Command to 're-apply' previous command?

Is there an easy way to re-apply a previous command to a new command line entry? Say I typed in chmod u+r,g+x file.txt but forgot the sudo. Could I simply type sudo <some easy symbol>'? ...
17
votes
2answers
627 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" ...
2
votes
3answers
55 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 ...
1
vote
3answers
84 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 ...
1
vote
2answers
209 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 ...
1
vote
2answers
49 views

Can I see in history output from which directory I had actually issued a command?

CTRL+R allows me to reverse search through the command history which is great but can I also find out from which directory that command was run? I am using C-shell in Linux.
3
votes
4answers
471 views

Shell: How do I get the last argument the previous command when it was detached?

Within the shell, typing ALT+. or using !$ recalls the last passed argument of the previous command. I use this all the time, but how do you do that when you detached the previous command? $ ...
26
votes
3answers
2k views

Why shouldn't someone use passwords in the command line?

Why do people fear writing passwords in the command line? The history file is located in ~/.history, so it's available only to the user who executed the commands (and root).
1
vote
3answers
2k views

How to run the most recent command on AIX?

How can I run the most recent command again from history in AIX Server? And how to edit the most recent command and run it again in AIX?
9
votes
2answers
904 views

Command line prediction

I've found an interesting paper: Predicting UNIX Command Lines about command-line prediction (based on user past activity), and I wonder if any actual implementation of such thing exists?
17
votes
1answer
10k views

How to remove a single line from history?

I'm working in Mac OSX, so I guess I'm using bash...? Sometimes I enter something that I don't want to be remembered in the history. How do I remove it?
8
votes
3answers
3k views

How can I remove duplicates in my .bash_history, preserving order?

I really enjoying using control+r to recursively search my command history. I've found a few good options I like to use with it: # ignore duplicate commands, ignore commands starting with a space ...
2
votes
4answers
425 views

How can I do the `history` command and not have line numbers so I can copy multiple line commands?

Sometimes I do the history command so I can see 4 commands in a row. I want to copy those commands so I can run them again. I usually select them with the mouse and shift-ctrl-c which works ok, but ...
9
votes
2answers
621 views

How to exit bash history search mode?

In Ubuntu 12.04 I use CTRL-R to enter a reverse history search. If the command I want is not found (after repeated CTRL-R), how do I immediately exit back to the (empty) command prompt with no ...
3
votes
4answers
259 views

Change working directory of 2 terminals at once

I've typically have gnome-terminal open with ~8 tabs, using 2 consecutive tabs for the same task (one has emacs, the other is used to do git checkins and unittest runs and so). When changing tasks, I ...
4
votes
3answers
2k views

How can I expand a relative path at the command line, with tab completion?

In bash is there any way to expand a relative path into an absolute path, perhaps with tab completion? I ask because sometimes I will search for a file, find it, then vim it: cd /etc cd apache2 cd ...
3
votes
1answer
461 views

Moving through history of commands on command line?

I used to use Up/Down to move through the history of commands. Then, a few days later it changed to Ctrl-p/Ctrl-n. Now this also doesn't work to move through the history of commands entered. How can ...
12
votes
2answers
3k views

How to execute consecutive command from history?

Suppose I want to execute a sequence of four commands that I have executed before. If the first one is 432 in the command-history, then I could do: $ !432; !433; !434; !435 I'm curious, is there a ...
1
vote
1answer
239 views

Pressing `up` to get the previous command in a tty on Ubuntu Server

I've installed Ubuntu Server 10.10, and when I press up in a terminal nothing happens. Using Ubuntu Desktop it gave me the previous command that I ran. How can I make it do this in Ubuntu Server as ...
16
votes
6answers
2k views

put history command onto command line without executing it

I use !n where (n) is the line number for executing a line in the history file I want executed at the command prompt which I find via history|less. But there is a command line history event I wish ...
17
votes
4answers
21k views

Understanding the exclamation mark (!) in bash

I used history | less to get the lines of previous commands and from the numbers on the left hand side I found the line I wanted repeated (eg. 22) and did !22 at the command prompt and it ...
5
votes
1answer
928 views

How to get a persistent “history”-file even after a non-clean shutdown?

I am trying Ubuntu Server 10.10 in VirtualBox. I like that the commands I run is saved in a "history"-file that can be shown with the history command. But if I just turn off VirtualBox without the ...
6
votes
6answers
561 views

How can I reproduce commands run on one machine on another machine?

I would like to install some software on a linux-machine that I have run in VirtualBox. Then I would like to do the same thing on a linux-VPS. I think that I can save all commands that I run using ...
5
votes
4answers
2k views

How to have separate command history for different sessions for the same user?

I face this issue on some of Unix servers. When I open different session for same user, command history is shared by all the session. This creates issues if by mistake I press Ctrl-P or up arrow and ...