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

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0
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1answer
77 views

Linux Mint 17.1: startx doesn't work and startxfce4 requires root

On Linux Mint 17.1 with XFCE installed, I removed MDM to enable booting in text mode. Now, when I try to run startx, it open the xfce4-panels on a grey background but gets stuck there with the panels ...
8
votes
3answers
609 views

How do I compress files in-place?

I have a machine with 90% hard-disk usage. I want to compress its 500+ log files into a smaller new file. However, the hard disk is too small to keep both the original files and the compressed ones. ...
3
votes
2answers
303 views

kill: SIGSTOP: invalid signal specification error in bash script

When I use kill on command line it works. kill -SIGSTOP 1234 But if I use in bash script file I get this error: kill: SIGSTOP: invalid signal specification sh file is #!/bin/sh kill -SIGSTOP ...
1
vote
2answers
5k views

How to fix curl sslv3 alert handshake failure?

I'm trying to curl HTTPS website in the following way: $ curl -v https://thepiratebay.se/ However it fails with the error: * About to connect() to thepiratebay.se port 443 (#0) * Trying ...
3
votes
1answer
172 views

prevent a command from sending both stdout & stderr to any terminal or file [duplicate]

I would like to prevent my program from sending stdout and stderr to any terminals, files or devices. For this, I have three command crossing my mind, but I cannot distinguish their differences. Could ...
-2
votes
3answers
57 views

Command to print users that don't have /sbin/nologin as a shell

Given the /etc/passwd file, what is the command to print only the login names of users that do not have /sbin/nologin as a shell? Also, in my /etc directory, what can I use as a command to count the ...
0
votes
0answers
54 views

Scientific linux GUI Doesn't start

I am a new user of Scientific Linux 6. I am working on a project started by others and unfortunately the GUI stopped working. I need to find out how to troubleshoot the GUI to solve the problem. What ...
3
votes
1answer
43 views

using shortcuts to move in bash command line [duplicate]

When I use Ctrl+Left_arrow or Ctrl+Right_arrow in bash, I move backward a "word" and forward a "word" respectively. I belive, this is defined in /etc/inputrc # mappings for Ctrl-left-arrow and ...
1
vote
1answer
121 views

How to tell the sizes of files and folders, sorted, and in MB, GB, instead of a long integer? [duplicate]

On a Mac, using Bash, I tend to do du -sh * to tell the sizes of files and folders in the current directory, in MB and GB. But if I want to sort them by the sizes, I might do du -sh * | sort -g ...
27
votes
4answers
2k views

Is there a simple Bash tool which can quickly render basic HTML?

From time to time I need to do a simple task where I output basic HTML into the console. I'd like to have it minimally rendered, to make it easier to read at a glance. Is there a utility which can ...
1
vote
0answers
23 views

How to get stdout of process? [duplicate]

I started a process from the command line, but the window server died. However I see the process I started is still running. Is it possible to connect a terminal to the process to see its output? ...
5
votes
2answers
382 views

How to target multiple selections with xclip

When copying text to the clipboard, xclip provides several selection targets: -selection specify which X selection to use, options are: "primary" to use XA_PRIMARY (default), ...
27
votes
10answers
14k views

How to understand what's taking up space?

I'm looking for a linux alternative to WinDirStat. I would like to know what is taking up space on my hard drives. A program that works on console and doesn't require a UI is preferred .
1
vote
1answer
103 views

Python now thinks arguments are files: Broken emerge, pip, livestreamer and most tools using Python

For these commands (in both bash and fish): sudo emerge eix emerge eix I get this error: usage: emerge [-h] [--version] [input [input ...]] emerge: error: argument input: can't open 'eix': [Errno ...
16
votes
3answers
3k views

IP to Country console command

Is there a console command that takes an IP address as an input and shows its geographical information like city, country, ISP, etc.?
4
votes
1answer
48 views

Print out unicode values of stdin?

I use od to print me the octal or hex of a file/stdin/string. This lets me see the ASCII, or UTF-8 encoded, values of my stdin. But we don't live in ASCIIland anymore. Is there any command that will ...
0
votes
1answer
53 views

Feeding audio from microphone live into python

Well, so I was reading about this raspberry pi tutorial that makes you play audio files from raspberry pi and stream them into a FM signal and something got me curious. You can stream .wav files, ...
3
votes
2answers
829 views

Enable second monitor from shell

So... I have two monitors on my Ubuntu machine. And every time I launch some Windows OpenGL application under Wine it turns off the second monitor. And leaves it turned off when the application exits. ...
8
votes
2answers
2k views

Aliases and tmux

Aliases defined in .bash_aliases and .bashrc don't work in tmux. Can this be changed in some configuration, so the aliases work under tmux?
0
votes
0answers
28 views

How to properly structure a zgrep command to return the proper count of expression matches?

I am trying to search through several bzipped CSV files and return a count of emails that contain a .br domain extension. It seems straight forward enough but I have not been able to structure a ...
65
votes
12answers
34k views

how do you sort du output by size?

How do you sort du -sh /dir/* by size? I read one site that said use | sort -n but that's obviously not right. Here's an example that is wrong. [~]# du -sh /var/* | sort -n 0 /var/mail 1.2M ...
2
votes
1answer
36 views

How do I punch a hole (FALLOC_FL_PUNCH_HOLE) in a file from command line?

There is fallocate(2) system call to make sparse files by erasing a "holes" in them. Is there a command line tool for it? Expecting something like: makehole myfile.dat --offset=10G --length=1G
-2
votes
2answers
58 views

Change file name in different path [duplicate]

I would like to know how to rename the same log file which is in different path. I mean, the log file is in /main/rel/1.2, /main/rel/1.3, /main/rel/1.4, /main/rel/1.5 etc. I want just do it from ...
12
votes
6answers
1k views

What is the difference between find . and find . -print

What is the difference between: find . and find . -print What does -print actually do? $ find . . ./hello.txt ./hello ./hello/txt ./hello/hello2 ./hello/hello2/hello3 ./hello/hello2/hello3/txt ...
0
votes
1answer
28 views

How can I add default command line parameters to an executable in a way that will also work on GUI apps? [duplicate]

I want to pass a command line program by default when I run it. myprog --foo=bar The solution I could think of was to add a custom "myprog" wrapper to my "bin" folder #! /bin/sh /usr/bin/myprog ...
3
votes
3answers
680 views

Averaging output of dstat

I need to average upload and download speed using dstat -n. How can I add all the received and sent data sizes that appear after dstat -n, so that I can add them and find average upload and download ...
4
votes
3answers
114 views

Adding vertical space after command in bash

How to add vertical space after each command in bash? Looking for a wee bit of vertical space, not a full line. 1/4 or 1/3 of the line height should do it. [edit] The space to add is only after the ...
2
votes
2answers
194 views

How to compare strings in two files

I have two text files, one file contains entries such as Id Value 1 apple 2 orange 3 mango 4 banana 5 strawberry 6 papaya In other ...
4
votes
4answers
141 views

Difficulty converting from binary to hexadecimal using bc

I read how to calculate using the command line calculator and a HERE-document, but nevertheless I do not get what I expected and can not find my error, what I did in the shell was: bc << HERE ...
3
votes
3answers
44 views

Is there any way to edit pipes while a process is running?

I sometimes work with processes that: Are slow to start up Run for a while Log a lot of information to standard out For instance, imagine that this is a large web application. Now suppose that, ...
0
votes
0answers
55 views

Configure ldap client without yast

I'm configuring an LDAP client in a large number of Suse servers. The only way that I know to do this is using Yast, and this way is slow. I can't find another way. Anyone know another way to do ...
1
vote
0answers
20 views

Is it Possible to globally set the java hs_err log Location?

I know when executing a jar using the command line option -XX:ErrorFile=[location] allows you to change where the hs_err log files are placed. I am wondering: is there is a place I can globally ...
138
votes
16answers
81k views

How to do integer & float calculations, in bash or other languages/frameworks?

Using echo "20+5" literally produces the text "20+5" What command can I use to get the numeric sum, e.g. 25 in this case. Also, what's the easiest way to do it just using bash for floating point, ...
2
votes
2answers
1k views

How to display server's TLS certicicate details in terminal?

Having TLS certificate in local file, I can display its details using syntax like: openssl x509 -text -noout -in cert_filename Is there any way to display remote SMTP/POP3/HTTP server's TLS ...
25
votes
8answers
70k views

How can I display the contents of a text file on the command line?

I would like to display the contents of a text file on the command line. The file only contains 5-6 characters. Is there an easy way to do this?
3
votes
1answer
58 views

Is it possible to show the current history line number when performing reverse search in bash?

Pressing Ctrl+R and typing py results in: (reverse-i-search) `py´: python I would like it to be this way: (reverse-i-search) `py´: n python where n is the history line number. I did not find an ...
85
votes
7answers
37k views

How can I find broken symlinks

Is there a way to find all symbolic links that don't point anywere? find ./ -type l will give me all symbolic links, but makes no distinction between links that go somewhere and links that don't. ...
1
vote
0answers
42 views

Program like vnStat that filters for only external (Internet) traffic

I've been using vnStat to monitor the ethernet interface on a Linux computer, but found that it includes all local traffic. I do many file transfers from within the subnet which far exceeds the ...
1
vote
1answer
43 views

How to change configuration of detox (dash instead underscore)?

I found, best to this moment, a solution when changing all those annoying filenames in large quantities, making them readable and easier to manipulate with in command-line. So I found, among many ...
2
votes
1answer
35 views

Updatedb unrecognized option '--localpaths='

I am attempting to update a single directory I created. I'm using updatedb so it will be found by the locate command. Command used: updatedb ...
1
vote
1answer
52 views

How to generate a list of configuration files accessed by a tool (eg bash or vi)?

Many times, there are slight inconsistencies between two similar linux machines, where (for example) tmux supports colours on Machine M1, and does not support colours on Machine M2, or vi adds ...
6
votes
4answers
296 views

Strip Filenames and Rename

What rename command can I use which will delete the present filenames in a directory and replace them with alphanumeric filenames? Such as gg0001, gg0002, et cetera? And I'd like the command to work ...
2
votes
2answers
6k views

wget to get all the files in a directory only returns index.html

I'm new to using bash, and I have been trying to wget all the files from a website to the server I have been working on. However all I'm getting back is an index.html file. I let it run for 15 minutes ...
22
votes
3answers
15k views

How to Determine the Amount of RAM Slots In Use?

I forgot how many RAM modules are installed on my laptop. I do not want to unscrew it but want to look it up on the console. How do I gather this information?
3
votes
0answers
204 views

Can't login via telnet in ddwrt

I have a Gateworks laguna 2388 router with dd-wrt firmware installed in it. It was working fine till i change "http_passwd" nvram attribute. I wanted to change the web GUI password via telnet. So I ...
3
votes
3answers
557 views

How to undo in spreadsheet calculator sc?

spreadsheet calculator sc is a very old console-based program. It does what the name says. I cannot find how to undo an operation in its man page. I currently use it together with RCS, ie. manually ...
193
votes
23answers
124k views

Repeat a Unix command every x seconds forever

There's a built-in Unix command repeat whose first argument is the number of times to repeat a command, where the command (with any arguments) is specified by the remaining arguments to repeat. For ...
11
votes
5answers
2k views

Using text from previous commands' output

EDIT April, 2015: If you have this same question I recommend also checking http://xiki.org/ I know this is not how terminals work, but I find myself often wishing there was an easy way of using ...
0
votes
0answers
30 views

Create complex installation script for Linux (Centos)

For deployment of a complex system I would like to create a script that runs all compilations and set up. I am looking for an existing product that interpret installation scenario and performs all ...
43
votes
4answers
27k views

What is the difference between Halt and Shutdown commands?

What is the difference between the halt and shutdown commands?