All Questions

Tagged with
Filter by
Sorted by
Tagged with
2
votes
1answer
55 views

scrypt key calculator

scrypt is a password-based key derivation function that can be tuned to use a large amount of memory. I want a command-line interface to calculate the key given my own values for parameters: password,...
0
votes
1answer
67 views

How can I get the “Google Response” to a query in the terminal?

I want to be able to get this terse result Google returns for some queries, from the command line: I tried Googler, but it returns this:
0
votes
1answer
372 views

crunch wordlist generation with all combinations

I'm trying to generate a wordlist in order to use it to bruteforce my own Truecrypt container. I do know parts of the password, its built up using blocks of other known passwords to increase length, ...
0
votes
1answer
37 views

Write scripts as stream-filters or parameter-only tools? [closed]

I'm writing a set of shell helper scripts - a kind of toolbox for simple data/text_files processing. In it there will be some simple tools like, for example: dateToTimestamp or showParagraphHeads. ...
44
votes
8answers
4k views

Why are POSIX mandatory utilities not built into the shell?

The purpose of this question is to answer a curiosity, not to solve a particular computing problem. The question is: Why are POSIX mandatory utilities not commonly built into shell implementations? ...
2
votes
8answers
1k views

Is there a shell command or utility for caching process output?

Hope this is the right place to ask. Is there a unix tool that works similarly to this? # invokes echo, saves to cache (using command with arguments as key), returns "hi" cache 10 echo hi # wait 2 ...
34
votes
6answers
7k views

How to trick a command into thinking its output is going to a terminal

Given a command that changes its behaviour when its output is going to a terminal (e.g. produce coloured output), how can that output be redirected in a pipeline while preserving the changed behaviour?...
5
votes
5answers
25k views

Where is the log of used commands in Linux?

In Linux, generally we use a lot of commands and it is difficult to remember all of them. history command provides the list of commands we used previously but its limit is less. New commands are ...
1
vote
1answer
138 views

Is there a tool that automatically inserts and updates a script header block for e.g. shell or Python scripts?

I found scripts by a former admin who scripted quite nice things with Bash or Python. All his scripts are well formatted and equipped with a always similar looking "script header" or "code header", I ...
2
votes
3answers
6k views

Why are file names surrounded with “â” sign?

After adding alias rm='rm -i' to my ~/.bashrc file (because, when I removed a file, it wasn't asking for confirmation), file names are surrounded with "â" signs as in the example below: rm: cannot ...
11
votes
2answers
8k views

sponge from moreutils - what's the difference to shell redirect? useful examples?

> brew install moreutils ==> Downloading https://homebrew.bintray.com/bottles/moreutils-0.55.yosemite.bottle.tar.gz #################...
2
votes
1answer
2k views

Relation between system calls and shell commands/utilities

In POSIX, Does a system call function often but not always have a command or utility in shell? Is there some rule of thumb about what kinds of system calls have corresponding commands or utilities ...
3
votes
2answers
114 views

Select added lines from file

I have two versions of a file where the newer one has some lines added. The files are sorted (think of wordlists) and I want to print out the newly added lines (given file1 and file2). I know how to ...
15
votes
2answers
14k views

Problem with install command to copy a whole directory

So I have a repo with some of my config files and I'm trying to create a makefile to install them in the homedir. The problem I have is that when I run the following command straight in bash install -...
1
vote
3answers
950 views

running an executable in parallel by dividing the input directory tree

Commands like find and grep would benefit greatly if they were to run in parallel. Is there a utility or a program that takes a command as an argument and makes it run in parallel by running multiple ...
4
votes
5answers
325 views

Standard unix util to split “foo.bar.baz” into “foo.bar” + “.baz”?

I want to split a string $basename, containing the output in two parts, $stem and $ext, such that: the string "${stem}${ext}" is identical to the original string $basename; either $stem or $ext may ...
2
votes
1answer
516 views

Is there a text-only equivalent (no curses) of `zenity --question`?

For my mercurial commit hook, I want to run my test cases and be asked whether I really want to commit if any of the tests fail. I'm thinking something like <run-the-tests> || <ask-yes-no>...
1
vote
1answer
2k views

Change Directory and List Files [duplicate]

Possible Duplicate: Make cd automatically ls I think that it would be very useful to have a unix utility that combines 'cd' and 'ls' so that when you change your directory, it automatically lists ...
8
votes
4answers
15k views

cp or rsync, is cp really worth it?

I hope this does not count as a question without a real answer, as I can't seem to find a good reason to use cp(1) over rsync(1) in virtually all circumstances. Should one typically favour rsync over ...
2
votes
4answers
705 views

xsel < /tmp/xselection not working in script

I'm trying to use the following script: #!/usr/bin/env bash # Edit xselection in gvim xsel > /tmp/xselection gvim /tmp/xselection xsel < /tmp/xselection But the final line does not seem to be ...
2
votes
1answer
2k views

How to plot the output of a command

How can I plot the output of this command line with GNUPlot? What should the diagram script look like? I want a histogram. wget -O - -o /dev/null http://www.stackoverflow.com/ | cat | cat | sed "s/&...
4
votes
2answers
819 views

ln gives different results when run multiple times

I have this simple script to use with seventh sense (it's a lone wolf gamebook reader/player): #!/bin/bash GAME_PATH=$(dirname "$(readlink -f "$0")") SEVENTH_SENSE_PATH=$(echo ~)"/.wine/drive_c/users/...
1
vote
1answer
1k views

Good “progress bar” about md5sum checking progress?

I'm using this right now: time md5sum -c *.txt | pv | grep -v ': OK$' but aren't there any smart solutions that can list that how many files haven't been checked? I mean I have many md5sum's in .txt ...
97
votes
5answers
227k views

Usage of dash (-) in place of a filename

For a command, if using - as an argument in place of a file name will mean STDIN or STDOUT. But in this example, it creates a file with the name -: echo hello > - How can I make - in this ...
3
votes
3answers
1k views

General specification for command line interface

I was wondering where I can find and learn some general idea about the command line interface used in Linux and bash? As to now, I have found pieces of such information only from experience, such as ...
72
votes
4answers
21k 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 ...
442
votes
4answers
155k 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 -- in there?
9
votes
3answers
593 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 ...
22
votes
11answers
19k 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 (...