Tagged Questions

The command-line is the interactive interface to your shell.

learn more… | top users | synonyms (1)

0
votes
3answers
32 views

Assigning files key words to easily find them later

Suppose I have a file. This file is stored in some complex location (within a hundred subfolders), but I nevertheless use it a lot. Is there some way to assign this file a set of keywords (i.e., "my ...
7
votes
1answer
99 views

How to filter any part of description or option from manpage

I want to get output of any desired description or option from a man page. Example: I want to get the description for the autoclean option from the apt-get man page: Please suggest a command, ...
1
vote
0answers
17 views

Control iPhone music from linux command line

Is this possible? Could one, for example, send a command to an iPhone which tells it to start playing a certain song?
1
vote
1answer
20 views

A quit command weaker than windowkill?

Typing in xdotool getwindowfocus windowkill currently terminates the active window and bypasses any safeguards like "would you like to save your work?". Is there a weaker command than windowkill I ...
2
votes
4answers
105 views

How can I disable lightdm auto-login from the command-line when isn't possible to get a GUI session?

Suppose auto-login to a session is active in Ubuntu. So there will not be an opportunity to select a session (e.g gnome, unity, kde, etc). But if the environment is corrupted there is no way to escape ...
0
votes
1answer
30 views

Installing Xcape (a newbie question involving the “make” command)

I executed the minimal building directions of xcape: $ sudo apt-get install git gcc make pkg-config libx11-dev libxtst-dev libxi-dev $ mkdir xcape $ cd xcape $ git clone ...
1
vote
2answers
29 views

Listing folder contents during cd command

I might be mistaken here, but I was watching someone navigate using the cd command, and without actually executing it, they were able to show the folder contents of the current folder. So if I type ...
17
votes
5answers
2k views

Why do I sometimes get repeatedly prompted with “>” in the terminal?

Alright, when I run certain commands the wrong way, (misspelled, etc.) The terminal outputs this: > instead of computername:workingfolder username$, and when I type enter it goes like this: > ...
2
votes
1answer
18 views

Gnu screen: remap “c-a c-a” to send “c-a”

I use GNU Screen on occasion, and my Emacs keybinding muscle memory is hard to overcome. I know that I can send a control-a (i.e. "go to beginning of line") by hitting "c-a a", but I'm wondering if ...
6
votes
2answers
368 views

What is the reliable way of getting each user's .ssh directory from bash?

I can parse the /etc/passwd with augtool: myuser=bob usershome=`augtool -L -A --transform "Passwd incl /etc/passwd" print "/files/etc/passwd/$myuser/home" | sed -En 's/\/.* = (.*)/\1/p'` ...but it ...
1
vote
0answers
29 views

How do I recursively apply default ACLs of a directory to its descendants?

If I have a directory with default ACL entries assigned to it, but some or all of its descendant files and sub-directories have access or default ACLs that do not agree with those defaults, how do I ...
0
votes
0answers
23 views

Help with a bash script [duplicate]

I'm trying to get a script working that will examine two directories and list all of the duplicate files found in both. Looking for duplicates based on content. And then have the script report the ...
3
votes
3answers
377 views

Why when I ssh into one server it shows bash and the other have my username?

So at work I have two web servers that I am able to ssh into. Both are RHEL 6.5 When I log into one, it shows this: [username@ldvweb01 /]$ When I log into the other one it shows: -bash-4.1$ ...
0
votes
1answer
53 views

how to find out the name of the server on which the files are hosted on? [closed]

I've tried numerous thing such as uname -a, env, findsmb, amongst other things but that will only give the hostname which is not the server where the files are hosted... I get that there is nfs ...
16
votes
7answers
878 views

How to efficiently generate large, uniformly distributed, random integers in bash?

I have been wondering what would be the best way to get good randomness in bash, i.e., what would be a procedure to get a random positive integer between MIN and MAX such that The range can be ...
2
votes
1answer
51 views

How to gather byte occurance statistics in binary file?

I'd like to know the equivalent of cat inputfile | sed 's/\(.\)/\1\n/g' | sort | uniq -c presented in ...
0
votes
2answers
43 views

Add space after 8 characters then add space after every 4 characters

Here is the sample input: AbbigailAbieAbbyAbbi Using sed, I have separated them into 4 characters but seems like I got a problem because I have to separate the first 8 characters first then add ...
8
votes
4answers
511 views

How do I remove spaces from shell variables?

I have done the following at command line: $ text="name with space" $ echo $text name with space I am trying to use tr -d ' ' to remove the spaces and have a result of: namewithspace I've tried ...
5
votes
3answers
151 views

I am trying to find a better/easier way to count alphabetic characters in a file or shell variable

I have a file containing the following text: we are going to write something 1 2 3 wc tells me I have 1 line 9 words and 38 characters. I'm looking to count the 26 letters only (a-z, no numbers or ...
0
votes
0answers
25 views

cant edit anything on xampp as sudo user [closed]

I’m new to Linux was an avid Windows user until recently trying on an old system seeing some major differences and converting, so I apologise if this question seems simple. I’m running the latest ...
0
votes
0answers
75 views

Gmail and mutt: msmtp error

Invalid SMTP URL: ssmtp://REDACTED@gmail.com@smtp.gmail.com:465/ I can use mutt to read my Gmail, but when I try to send I get the above message. When I installed mutt a screen came up for postfix ...
0
votes
0answers
14 views

How to maximize and minimize windows from the command line? [duplicate]

Is there any way to send a command to the currently focus window to minimize or maximize? I'd like to be able to control this from a script, or tool bar launch icon.
2
votes
2answers
161 views

Difference between who and whoami commands

The man page description of who command is who - show who is logged on But there exists a similar command whoami. The man page description of whoami is whoami - print effective userid Can anyone ...
3
votes
1answer
52 views

Get a list of applications that are playing sound [closed]

I want to get a list of applications that are currently playing sound (using the sound card). I tried to search on a lot of places but did not succeed. Any method is fine (bash, Java, etc.). I want ...
0
votes
0answers
26 views

How to modify ENV in Solaris 10 [duplicate]

I wanted to edit the contents of environment when entering this "ENV" in terminal. I googled this but so far none of the solution offered works in my end. The closes solution that i got was to edit ...
1
vote
3answers
94 views

How to display contents of mounted /boot and '/' root partitions?

How to display contents of mounted /boot and '/' root partitions of Debian on SSD drive from Linux Live CD? I know ls -1 to list directory contents, but what is exact steps to get this?
4
votes
3answers
429 views

Switching among cli and vim and other files workflow

I saw some kind of workflow in vim: Vim had a file open. Then some combination of keys made vim disappear and the user was in the command line working in cli mode, then opened another file and then ...
2
votes
2answers
61 views

how to recall last argument in bash with vi setting

I use set -o vi setting in bash. The shorcut Alt+. (recalling last argument of previous command) here doesn't work as in emacs mode, so what is the equivalent for vi?
1
vote
2answers
58 views

How to identify user and server with short commands?

I've been teaching my students the basics of the Unix OS (and Linux) for 4 weeks now. I want to give them a home assignment next. It's the first one so the questions and tasks won't be hard. My only ...
0
votes
0answers
42 views

How to get mpd to recognize music library?

I have arch running on my desktop and I'm trying to play music with mpd using ncmpcpp. They are both up and running, but the problem is when I open ncmpcpp it doesn't show my music. I copied the music ...
0
votes
1answer
92 views

How to determine Apache user from the command-line?

There is a question about the group, but I couldn't find any question/answer for getting the Apache user. Therefore how to determine Apache user from the command-line?
3
votes
3answers
213 views

Method for storing/remembering one liner commands

Often when configuring and adjusting unix-based systems I use a lot of one-line commands that are difficult to remember. For example, to determine what version of ntp (the time server) is running, you ...
1
vote
2answers
42 views

Outputting common lines from 2 files and uncommon lines from both the files in one output file

I have 2 text files. Lets name them file1.txt and file2.txt file1.txt is as follows chr10 181144 225933 chr10 181243 225933 chr10 181500 225933 chr10 226069 255828 chr10 255989 267134 ...
1
vote
2answers
87 views

Print UTF-8 file with command line tools

I want to print a file using a command like cat filename > /dev/lp0 where the file contains characters like ùàç encoded in UTF-8. Is this is possible or do I need to use CUPS? I'm using an ...
2
votes
0answers
22 views

Close All Piped Commands if one close

I'm running at least 3 commands (with progs) using pipes. For example program1 bla bla | program2 blabla | program3 bla bla Is possible to close all programX PIDS automatically if at least one ...
1
vote
2answers
77 views

How to kill all processes for a given user that take longer then X time

When I list processes with ps auxf I often see some that are stuck and I need to manually kill them. How can I do it with one command? Example ps result: $ ps auxf USER PID %CPU %MEM VSZ ...
1
vote
1answer
50 views

Is autocompletion for applications done by shell?

When I type evince, and then hit tab, the bash shell will list all files that can be opened by evince, which seems to be based on the ext part of the filename. Is this done by shell or the ...
1
vote
2answers
79 views

Use awk to find first occurrence

I have a log file that gets updated when my script runs. The script will insert "Start of script" text when it starts and "End of script" text when it finishes running. I am trying to capture the ...
5
votes
7answers
781 views

Linux command line. Move all files and directories in directory, except some files and directories

I have a folder A which has files and directories, I want to move all those files and directories to another folder B, except file, file2, directory, and directory2. How can this be done?
0
votes
0answers
31 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 ...
2
votes
4answers
179 views

How to display the number of lines, words and characters in separate lines?

I want to display the number of lines, words and characters, in a file, in separate lines? I don't know anymore than using wc filename for this.
3
votes
2answers
110 views

get result text from CLI command

I'm writing a bash script and I need to capture the text resulting from the output of the rsync command, for instance, the following command: rsync -av "$FOLDER1" "$FOLDER2" prints: ... sent ...
2
votes
2answers
46 views

How to make an infinitely executing command kill itself when certain conditions are met?

I'm running a command on command line which infinitely generates a certain data and I'm looking for a particular bit of data, so I used grep to find it. As soon as I get the data, I want the command ...
1
vote
1answer
174 views

How do I Nohup an interactive shell-script?

My Script is having 2 command-line arguments and then just couple of questions, after these questions the script will run for itself, I'm able to pass the command-line argument by just doing, ...
1
vote
3answers
238 views

Execute a file if a command is not found

When I try to execute files in Linux, I'm always annoyed by the need to write ./executablefile instead of just executablefile. I get why it's done, so it won't have an ambigous input, one that is a ...
0
votes
1answer
31 views

Command line utility to learn bit twiddling hacks

I am currently reading Hacker's Delight and would like to practice as I read through the book. Is there any command line *nix tool to perform binary operations and see output in binary?
1
vote
3answers
78 views

What is the concept hidden behind the term “command”?

I have been using, studying and developing for Linux for quite a few years now, and over time, I have successfully convinced a few people to join the cause, and make the switch to Linux. However, ...
1
vote
0answers
61 views

How to connect tata photon in X window manager in ubuntu 14.04 using command line

Due to some reason I had to shift from Gnome to X(basic X). So here on the desktop nothing appears (no launcher, no menu bar, nothing) but we can open command line in it using Ctrl+Alt+Tab. (I have ...
1
vote
1answer
93 views

Apply recursive chmod to files or folders only

I'd like to apply chmods to files and folders in one line, Basically: chmod 700 ./* -R # but only apply to folders chmod 600 ./* -R # but only apply to files Of course I searched google and read ...
2
votes
1answer
103 views

How to sort files based on the json property value inside the file?

I've downloaded list of videos via youtube-dl and each file has corresponding .json file containing certain properties. So I would like to sort the files based on the selected json property which is ...