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

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7
votes
2answers
6k views

Samba mount with password prompt as non-root user

I want to mount a password-protected SMB share (served by a Windows machine). The share is protected by a user name and password, and I may not write the password in a file, I want to be prompted for ...
5
votes
1answer
439 views

How to make sure OpenVPN is connected?

I need some sort of "safeguard" for my VPN connection. If the connection drops, the machine shouldn't even reach the internet. (I can reach the machine by other means.) Is it possible somehow? If I ...
3
votes
1answer
934 views

How to convert a PowerPoint ppt file into HTML files?

I have to find a free, gratis command line solution to convert primary Microsoft PowerPoint presentations into HTML files (1 HTML file per foil) on Linux (Debian, OpenSuse). It would be nice if the ...
3
votes
1answer
375 views

Live program output monitoring tool

I would like to know if there is a tool that would enable you to watch how the program output changes live. Something like tail -f but instead of monitoring the file changes, it would repeatedly call ...
2
votes
1answer
904 views

How to convert a group of video files using FFMPEG?

I have several video files in a directory and I want to convert all of them into other video formats. Is there any way that I can convert all of them in just one go using FFMPEG. I mean without having ...
0
votes
1answer
95 views

Why does this compound command report errors when copying directories? [duplicate]

Possible Duplicate: Why does this compound command report errors when copying directories? if one executes the following two commands in one line, as follows, rm -rf dir ; cp -r dir2 ...
8
votes
3answers
3k views

How can I print well formatted code

Similar to using markdown on Stack Overflow to create monospace output, how can I do that for my programs. I tried lp filename.txt and was pleasantly please to find that it was able to use the local ...
2
votes
5answers
899 views

Where are command line arguments (e.g. 'some.text') actually passed to?

From what I know, parameters you pass to a command, goes to it's STDIN stream. so this: cut -d. -f2 'some.text' should be perfectly identical to this: echo 'some.text' | cut -d. -f2 as we send ...
8
votes
2answers
3k views

Find filesystem of an unmounted partition from a script

I'm writing a custom automated install using AIF (Arch Installation Framework), and I need to find the filesystem on a partition given a partition. So far I have this: grok_partitions () { local ...
6
votes
3answers
13k views

How to check from a command line that network is reachable?

I want to send a growl to myself after SuSE server finishes the boot process. I got this message socket_sendto(): unable to write to socket [101]: Network is unreachable in. How can I check from ...
18
votes
1answer
732 views

Is there a standard command that always exits with a failure?

I want to test my script with a command that fails. I could use an existing command with bad arguments. I could also write a simple script that immediately exits with a failure. Both of these are easy ...
1
vote
4answers
7k views

checking running process

I am new babe to Linux. So please skip to read if you are not patient with begineer. Let's say I am asked to check and shut down the processes that I am not familiar with. So when I ls under bin ...
2
votes
3answers
3k views

UNIX commands help - find

I'm trying to learn UNIX commands and I'm playing this game to learn and I'm really stuck at the moment. I'm in a server through ssh and the directory is full of random files and folders and the ...
2
votes
2answers
753 views

Inner function call with xargs parameters

I am trying to create a file occurent within my /tmp directory of each file containing a speicific string. The problem is that the call to basename {} does not seem to work. Neither this, neither ...
1
vote
2answers
18k views

How to install/remove/upgrade .rpm packages on Red Hat?

I am new to linux, and at the university we are using this distribution to mount servers on VM, but I need to install a package that is missing in my virtual machine that is running Red Hat, but how ...
3
votes
2answers
265 views

Any CLI to validate URL? [closed]

I got a bunch of URLs (more than 1,000) and I am wondering if there is any CLI script to validate URL for http schema?
6
votes
3answers
701 views

Where to start creating CLI applications?

After using linux for a month or two, I know what I'm doing now. When creating programs, using whatever language, I've obviously been using code like this: $ python test.py And so if I wanted ...
10
votes
2answers
816 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
1answer
1k views

How to do df only on root partition?

How can get df results only for / partition. The partition name/identification (/dev/sda2, /dev/cciss/c0d0p1) could vary on different computers.
5
votes
1answer
431 views

Is there an operator like && that ignores return status?

I've discovered the following useful trick for long-running tasks on the command line: do_some_task && make_a_noise For instance, on OSX: do_some_task && say 'done' However, ...
4
votes
1answer
738 views

How to run this in sudo?

I have this line that I execute from php sudo -u db2inst1 -s -- "/opt/ibm/db2/current/bin/db2 connect to PLC; /opt/ibm/db2/current/bin/db2 \"update EDU.contact set MOBILE_PHONE = '123'\"" it works ...
-1
votes
1answer
2k views

Check if the command exists in bash

I want to check if a given command exists in bash and I care only about the native commands of the bash and not the scripts written by the user. When I refer to native commands I mean all those ...
-1
votes
3answers
305 views

Duplicate bash prompts

I'm having an interesting issue with XFCE Terminal/Gnome Terminal (not reproducible in XTerm), where executing bash or logging in using login or su will open a new Bash instance inside a Bash instance ...
3
votes
0answers
92 views

Importing hdhomerun channels into MythTV

I am setting up a MythTV backend, to stream Live TV from. I scanned for channels with the hdhomerun_config utility, and got this However, I really don't have a clue how to import it into MythTV.
2
votes
1answer
94 views

How to make a module dynamically loadable on Debian?

I'm applying an API from maxmind. They require additional an module for Apache. Now they recommend the command: apxs -i -a -L/usr/local/lib -I/usr/local/include -lGeoIP -c mod_geoip.c ...
10
votes
4answers
622 views

How do I shutdown, reboot and logout the system from the command-line?

I would like to do that using the command-line, because sometimes my computer freezes and I need to force a shutdown (I know it's not good to the hardware). And: What is the difference between Halt ...
17
votes
2answers
427 views

Is there a standard Unix command to check English verb conjugation?

Having recently come across wordlist and wordnet, two great discoveries on their own, I'm now looking for a similar tool, if simpler, that will take the bare infinitive of a verb and return the simple ...
18
votes
6answers
781 views

How stable are Unix shell “stdin/stdout APIs”?

grepping, awking, sedding, and piping are day-to-day routine of a user of any Unix-like operating system, may it be on the command line or inside a shell script (collectively called filters from now ...
6
votes
3answers
1k views

How to tweet using terminal?

I would like to tweet a message using terminal. I tried something like: curl -u 'TwitterUsername':'TwitterPassword' -d status=”Your Message Here” https://twitter.com/statuses/update.xml but seems ...
1
vote
2answers
1k views

random number needed

I need a command line script that will generate a random integer between 1 and 6. I'm using Ubuntu with bash. I was working on this a couple of months ago using 'bc', but never got it to work ...
1
vote
0answers
300 views

Is openwrt difficult to use for a novice? [closed]

Background I am very interested in openwrt, I like that it's open source and gives you complete, granular control over your router. I'm going to use my router for a home network (with a nas, htpc ...
5
votes
4answers
1k views

Is there a difference between these two commands?

cat a > b and cp a b If they are functionally the same for all intents and purposes, which one is faster?
2
votes
0answers
35 views

Batch up a number of jobs to run concurrently [duplicate]

Possible Duplicate: Four tasks in parallel… how do I do that? I have a group of jobs to run (a few hundred jobs) - they have a variety of command names and parameters. Each one runs ...
9
votes
1answer
1k views

How to have tail -f show colored output with vim?

In this question, Gilles answered Yet another possibility is to run tail -f in an Emacs shell buffer and use Emacs's syntax coloring abilities. Because I'm a vim user, I'd like to do this with ...
12
votes
3answers
10k views

find n most frequent words in a file

I want to find, say, 10 most common word in a text file. Firstly, solution should be optimized for keystrokes (in other words - my time). Secondly, for the performance. Here is what I have so far to ...
14
votes
3answers
5k views

How to kill a process with a single command?

I want to kill a process, after finding the id in a single step. I currently use these two commands: pidof <name> kill <#number_which_is_result_of_command> How can I write a single ...
3
votes
2answers
532 views

Change (not remove) “fortunes” in Linux Mint console

I don't mind the idea of quotes when I load the Mint console, however the OEM text leaves much to be desired. I'd like to update the quote text with inspirational or otherwise useful quotes. How ...
8
votes
3answers
1k views

How can I cd to the previous/next sibling directory?

I often have a project directory layout like this project `-- component-a | `-- files... `-- component-b | `-- files... `-- component-c `-- files... I'll usually be working in one of the ...
5
votes
1answer
670 views

Redirect terminal output to image file

I need to programmatically run some unix commands and get the output in a image file, the format could be png or jpeg (jpg). The commands are run in an AIX (IBM *nix) machine. I don't have ...
1
vote
1answer
196 views

How to configure a shortcut to open a window accessed by right click on the systray icon?

The application I am referring to is Turpial and it is a Twitter client. The problem is to open the window I need to send twits, I have to right click on a systray icon and select an option. In the ...
6
votes
5answers
1k views

resolve all ip addresses in command output using standard command line tools

I have several log files that contain a bunch of ip addresses. I would love to be able to pipe the data through a program that would match and resolve ip addresses. I.E. cat /var/log/somelogfile | ...
1
vote
2answers
304 views

Command-line web browser with Kerberos authentication?

QUESTION: Is there a Kerberos-friendly web browser usable via an SSH console? I have tried links but it does not seem to work with Kerberos (the webapp asks me for login/password even though I have a ...
3
votes
4answers
266 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 ...
7
votes
2answers
642 views

Shell Script for going through a dir recursively and chmodding based on conditions of file type

Can anyone point me to either code or a tutorial for writing a shell script that can recursively go through an entire directory structure (starting at the current working directory, or given an ...
1
vote
2answers
545 views

Search and delete .Trash

I have 4 large USB devices with lots of backups collected over the years. I want to search for all .Trash folders and delete the contents on Fedora 17. I tried the following which failed:- # ...
124
votes
15answers
70k 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
1answer
452 views

Creating a list of unique senders from Thunderbird mail files through the command-line

I've got some large mailboxes and using Thunderbird, that means that I have several mbox files. These single files contain all e-mails in a particular folder. Now, I would like to get some data on the ...
5
votes
2answers
9k views

executing if-statement from command prompt

In bash I can do the following: if [ -f /tmp/test.txt ]; then echo "true"; fi However, if I add sudo in front, it doesn't work anymore: sudo if [ -f /tmp/test.txt ]; then echo "true"; fi -bash: ...
16
votes
3answers
4k views

Command for forcing a pointer ungrab (captured mouse release)

Sometimes Firefox doesn't release the mouse after dragging, so I need to kill the application to force it to release its pointer grab. Is there any command to force an application to ungrab the ...
1
vote
1answer
117 views

attr man page missing?

How does one search for certain manpages (such as http://linux.die.net/man/5/attr)? Trying: man attr and man -K attr don't seem to work. Any ideas why?