small programs used on the command line to do a specific job

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3
votes
2answers
17k views

How do I get UUENCODE to work?

I have a server that I have inherited that has an older version of Redhat installed due to software requirements and now there is a need to use UUENCODE to allow email attachments. The uuencode and ...
3
votes
1answer
114 views

Colour problem when capturing a png of the top panel of the screen

I want to capture a window as a png from within a bash script, using the window's ID. In this case, the window is the top panel.  Using gnome-screenshot the colours are true, as per this image... ...
4
votes
5answers
8k views

How do I find the X window ID under the mouse pointer in bash?

From a bash script, is there some way to get the ID of the X window under the mouse pointer? (edit) I need the process to be non-interactive.
3
votes
2answers
167 views

Why do I get a 'conformability error' when I attempt to convert water in GNU units?

I've been using the GNU units program and I seem to think that I should be able to convert water between a volume and a weight. Examples: You have: 1 gram water You want: cm^3 conformability error ...
4
votes
6answers
20k views

Console tool to test internet bandwidth

I'm looking for a tool that will test my internet connection bandwidth and create an simple report like speedtest does. Do you know some program/tool that do this? Something with CentOS packages ...
5
votes
2answers
1k views

Combine input from multiple files/pipes without clobbering lines or blocking?

Is there a tool that will take input from multiple files or pipes and write it to stdout, without blocking on reads, such that individual input lines come out intact? I basically want to multiplex a ...
12
votes
2answers
1k views

Is '-9' a flag to kill command?

What does -9 do? It does not show up in the syntax: $ kill kill: usage: kill [-s sigspec | -n signum | -sigspec] pid | jobspec ... or kill -l [sigspec] $
1
vote
3answers
335 views

Sort data on multiple columns

INPUT (unsorted, bad) "XYZ-ZTE-43255 serverB618 agreed","XYZ-ZTE-44432" ,"XYZ-ZTE-43255" "XYZ-ZTE-52775 serverB110 agreed", "XYZ-ZTE-79213 - serverB688 agreed", "XYZ-ZTE-77323 serverB617 agreed", ...
1
vote
1answer
2k views

e2fsck progress bar?

How can I see the progress of e2fsck in the terminal? Are there any pv like ways? For example how can I see how far along this command is in progress: e2fsck -f -y -v /dev/sdb1
5
votes
4answers
2k views

In UNIX, how to find the most commonly used commands in history of unix?

In UNIX, how to find the most commonly used commands in history?
8
votes
4answers
21k views

How to recover data from a bad SD card?

I have a 4GB SD card with some family pictures on it that I need to recover. When I insert the card into my card reader, it shows up as an unknown 32MB device (as /dev/sde) and cannot be mounted. When ...
4
votes
2answers
766 views

Why is bash completion of a symlink different than a directory?

I usually do a find with an environment variable as the path when searching for source code. Recently I replaced my environment variable with a symbolic link, and it broke Bash's shell completion. ...
13
votes
3answers
2k views

Why use superflous dash (-) to pass option flags to tar?

To create a tar file for a directory, the tar command with compress, verbose and file options can be typed thus: $ tar -cvf my.tar my_directory/ But it also works to do it this way: $ tar cvf ...
8
votes
5answers
3k views

Alternative to find?

Is there an alternative find program with a more conventional CLI interface? find works and expects parameters in a painfully different way from most other utils. Clarification: I'm looking for a ...
2
votes
1answer
46 views

Explain the output of -D rates in GNU find

I did ~/pythonsource1/python2.6-2.6.5$ find -D rates . -type d and got Predicate success rates after completion: [need type] -type d [0.4] [280/4350=0.0643678] -a [0.4] [280/4350=0.0643678] ...
2
votes
1answer
434 views

ntop versus mrtg

I'm evaluating tools for measuring network activity and although mrtg seems to be the most highly regarded, I'm really impressed by ntop. Are there any reasons that mrtg is preferred to ntop?
1
vote
1answer
71 views

Good base converter or help using gbase?

Dear all, Could you suggest a good base converter that also does "signed" conversions? Either gbase does not do it, or I can't see how it's done. Any help would be great. What I want to do is give the ...
7
votes
2answers
10k views

How can I test the encoding of a text file… Is it valid, and what is it?

I have several .htm files which open in Gedit without any warning/error, but when I open these same file in Jedit, it warns me of invalid UTF-8 encoding... The html meta tag states ...
32
votes
4answers
3k views

What is the difference between a builtin command and one that is not?

Is there any intrinsic difference between a builtin command and another command which can nominally do the same thing? eg. Do builtins get "special" treatement? ... is there less overhead running ...
63
votes
2answers
16k views

What does “--” (double-dash) mean? (also known as “bare double dash”)

I have seen -- used in the compgen command. For example: compgen -W "foo bar baz" -- b What is the meaning of the --.
31
votes
7answers
4k views

Linux tools to treat files as sets and perform set operations on them

Does anyone know of any linux tool specifically designed to treat files as sets and perform set operations on them? Like difference, intersection, etc?
3
votes
2answers
1k views

How do I time a specific command?

(The linux equivalent of TimeThis.exe) Something like: timethis wget foo.com Receiving foo.com ... wget foo.com took 3 seconds.
24
votes
4answers
14k views

What is the mknod command used for?

I just started using Ubuntu as my main OS and I wanted to learn about things I should not do, and learn by the bad things people have done in the past. I came across these email about horror stories ...
7
votes
1answer
332 views

Is there a way to make perl -i not clobber symlinks?

A friend of mine points out that if you do: perl -pi.bak -e 's/foo/bar/' somefile when "somefile" is actually a symlink, perl does just what the docs say it will do: It does this by renaming ...
0
votes
1answer
85 views

Sources to learn about performing certain tasks on command line?

Can someone transform it into community wiki please? I guess I've got no privileges for that. Let's list practical sources for learning about performing certain tasks on *nix command line. E.g. I ...
16
votes
4answers
4k views

Setting the window dimensions of a running application

I'm trying to start an application within Ubuntu (xfce or gnome) and via the command line and was wondering if there's a generic way to set the dimensions of a given window of a given app that is ...
4
votes
2answers
2k views

wgetpaste alternatives?

Are there any wgetpaste alternatives?
9
votes
3answers
442 views

Doing two things with output from a command

I have a program texcount that outputs the number of words in my LaTeX document. I can also pipe the output of this to sed to make the newlines TeX linebreaks and write this to a file which I can then ...
5
votes
1answer
447 views

How to use the ul command line utility

I wanted to answer http://unix.stackexchange.com/questions/3043/use-roff-to-underline-words with "just use ul, this command is meant specifically for underlining text", however I just can't grasp how ...
6
votes
1answer
475 views

Difference between references of Linux “utilities”, “commands” and “programs”

I read uses of the word "utilities" for commands/programs such as 'ls', 'chmod', 'mv', etc. Is "commands" is Linux referring to the same things as top, ps, etc., or are those something different? ...
16
votes
9answers
8k views

Tool in UNIX to subtract dates

Is there any tool in Solaris UNIX (so no GNU tool available) to subtract dates? I know that in Linux we have gawk that can subtract one date from another. But in Solaris the maximum we have is nawk ...
25
votes
5answers
6k views

Is there any option with 'ls' command that I see only the directories?

Sometimes, I need to check only the directories not files. Is there any option with the command ls? Or is there any utility for doing that? EDIT: I'm using Mac OS X, and ls -d gives me . even though ...
6
votes
9answers
459 views

What is/are the standard CLI program(s) to manage users and groups?

As the title says, I'm basically asking about user management from the command line (e.g. on a system where there are no graphical tools available). In the past I've used several different programs to ...
14
votes
8answers
1k views

What are the best general purpose programming tools to complement Vim?

I've been using Vim as my text editor for a little while now and I feel like I'm taking the long way to do anything. I use ctags to tag my code base for navigation and I use grep (although ...