recall commands previously typed in a shell or other utility
0
votes
1answer
23 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
26 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
60 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
29 views
HISTTIMEFORMAT modification. In /etc/bach.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 ...
3
votes
3answers
44 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 ...
10
votes
4answers
341 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
64 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
0answers
39 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 ...
9
votes
2answers
148 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
55 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 ...
3
votes
1answer
79 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 ...
2
votes
0answers
36 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 ...
18
votes
1answer
684 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
78 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 ...
0
votes
1answer
143 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
113 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
444 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 ...
8
votes
2answers
220 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 ...
4
votes
1answer
84 views
how to enable command history of shell
I am using ubuntu 13.04, in this the command history of the shell is getting erased on close.
Can someone tell me how to prevent this from happening?
10
votes
1answer
308 views
How can I `alias sudo !!`?
I'm trying to set an alias for sudo !! in Bash. I tried alias sbb='sudo !!', but it interprets that as a literal !! and prints
sudo: !!: command not found
If I use double quotes, it substitutes ...
1
vote
2answers
45 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.
4
votes
3answers
120 views
Tricks for avoiding bash history logging? [duplicate]
What are some tricks for avoiding bash history being logged in a fascist logging environment that does not involve modifying .bash_rc or deleting content from within the history file?
2
votes
6answers
118 views
Bash - Split the previous commands parameters
How would one parse the previous command in bash?
Example:
root$ ssh [email protected]
root$ echo !$ &>/tmp/foo.txt
root$ cat /tmp/foo.txt
[email protected]
Goal:
Send just the ipaddress 1.2.3.4 to ...
0
votes
2answers
77 views
How to use the last command in the while loop?
I am wondering how to modify this code.
ls
while [ 1 > 0 ]
do
fc -s
sleep 1
done
For fc -s, you can refer to this question for details.
My question are as follows:
How will it run? If you ...
4
votes
1answer
106 views
Diff the output of the last two commands
I frequently find myself doing something like the following:
$ big long command 1
$ big long command 2
$ diff -u <(big long command 1) <(big long command 2)
How can I get the shell (bash in ...
5
votes
1answer
135 views
Why does `!45` get replaced with `top`?
I was trying to a string search within Ubuntu 12.04 which went as follows:
find . -exec grep -l "!45" {} \;
Instead of searching for the string "!45", it was replaced with top. It didn't invoke the ...
3
votes
1answer
40 views
How to revert direction for last parameter shortcut?
I can append a last used parameter via the keyboard shortcut Alt + . yet sometimes, I type too fast and miss my actual target. If I wanted to go back one instance, is there a way to do it?
I ...
4
votes
1answer
84 views
History of commands and directories we were in
I was wondering: If I type history I can see the previous commands I typed and see what happened and perhaps keep commands as reference. But I don't know in which directory I was when I typed the ...
2
votes
3answers
109 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?
$ ...
4
votes
3answers
101 views
Use bash history file from old machine when setting up new machine?
I love my bash history. Sometimes I've issued really long commands and I really depend on my bash history to get them back quickly. I've increased my history size with:
HISTSIZE=100000
...
1
vote
0answers
30 views
why bash history overlap the prompt when scroll up in the history? [duplicate]
I customized my bash prompt, PS1 value.
~/.bashrc:
Color_Off='\e[0m' # Text Reset
BGreen='\e[1;32m' # Green
BPurple='\e[1;35m' # Purple
BWhite='\e[1;37m' # White
...
24
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).
4
votes
4answers
143 views
echoing symbols in terminal/bash
Why am I not able to use "!" when trying to echo a message in terminal? For example:
echo -e "Hello\nWorld!"
bash returns the following command:
bash !: event not found
3
votes
3answers
121 views
Persistent shell arguments
I often find myself running a series of commands on a single set of arguments.
For example:
$ nmap -Pn -sS 192.168.1.5
$ ssh 192.168.1.5
$ curl 192.168.1.5
$ wget -r 192.168.1.5
This can be sped ...
1
vote
0answers
52 views
Zsh: quickly bookmark commands
I just had an idea, I'm sure it must exist though I could not find anything on the web.
This topic gets close to my idea but not enough:
How to quickly store and access often used commands?
I'd like ...
1
vote
1answer
86 views
Different “history” command output after reconnecting via SSH
Why do I get different results for the "history" command for the same user after I reconnect a disconnected SSH session?
I connect to a server using putty (SSH), say as root
My network gets ...
17
votes
5answers
1k views
In what situations would a user not let the shell record his command into history?
If I add export HISTCONTROL=ignorespace in .bashrc, bash won't record any commands which have whitespace before them into history. But I do not understand under what situations it will be useful. ...
3
votes
3answers
164 views
Lots of text files into one big text file
I want to combine thousands of little text files into one big text file. I have them in directories with the structure: timestamp1/status.txt. For example: 20130430133144/status.txt.
So far, I know ...
4
votes
1answer
98 views
Per-directory history in zsh
I am happily using zsh since a while now, and I am quite satisfied with my history settings, which are:
# Write to history immediately
setopt inc_append_history
# History shared among terminals
...
3
votes
1answer
72 views
Keep two bash history files, one with ignoredups, one with everything
For the purposes of looking at which commands I am using the most, I'd like to keep a record of command I type in my bash history (even duplicates).
But, for sanity and ease of use, I still want to ...
4
votes
2answers
107 views
Bash Command (History) Number In PS1
I am a noob in bash to be honest. I have Googled around and cannot find an answer to this:
history lists previous commands and their number e.g.
$ history
286 clear
I want to be able to see the ...
1
vote
3answers
219 views
Best tool for monitoring server usage
I was just wondering what the best tools for retracing logs and what logs I should be checking to work out what's going wrong with a server, or what the client has executed to get the server into it's ...
1
vote
1answer
80 views
Enable previous command cycling at ftp prompt
Currently on pressing arrow keys or Ctrl+P/N, I see characters like
ftp> ^[[A
ftp> ^[[B
ftp> ^P
ftp> ^N
I would like to know, how to configure the ftp prompt so that I am able to view ...
6
votes
1answer
2k views
Delete last N lines from bash history
When accidentally pasting a file into the shell it puts a ton of ugly nonsense entries in the bah history. Is there a clean way to remove those entries? Obviously I could close the shell and edit the ...
-2
votes
2answers
448 views
History command in ksh not able to use [closed]
I am using the ksh shell. I am not getting any impact of these following commands. It is executing without any error but it is not giving the proper results.
export HISTTIMEFORMAT='%F %T '
Use the ...
3
votes
1answer
39 views
How can I prevent edited commands from overwriting the original? Or revert edits?
Often I'll execute a command in bash, press the up arrow to retrieve it from history, edit it, and execute the edit. However, sometimes I'll decide to discard the edit and run a different command or ...
4
votes
3answers
125 views
Can any shell do argument-level interactive search?
Sometimes I need to reuse certain long arguments like paths.
If I use history search (CTRL+R), I may find some command that contains the path, but I still need to delete anything else in the old ...
4
votes
2answers
644 views
How to delete commands in history matching a given string?
I need to delete all commands in my history matching a string. I've tried:
$ history | grep searchstring | cut -d" " -f2 | history -d
-bash: history: -d: option requires an argument
$ history | grep ...
1
vote
1answer
415 views
Keep all commands in bash history?
I have the opposite question to this. How do I keep all commands in bash history?
In Ubuntu since quite some time now, the default for bash is to forget commands with non success exit code. This is ...
1
vote
3answers
526 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?
