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7
votes
2answers
528 views

In an empty environment, how are executables found?

For experimentation purposes I created a binary that prints the $PATH, and calls which as follows: #include <stdlib.h> #include <stdio.h> int main() { char *path = getenv("PATH"); ...
7
votes
2answers
436 views

Is it possible to keep a FreeBSD system up to date (base system + packages) using only binaries?

I have been using Debian and NetBSD systems for a long time, and I have got used to do binaries upgrades for the base system and for packages (using pkgin with NetBSD) Now the NetBSD kernel does not ...
0
votes
2answers
72 views

Is it possible to cache external binary in a shell script?

My question, might sounds a bit strange, but this morning I read this question: Why is “echo” so much faster than “touch”? I perfectly understand the concept of built-in function, but I wonder if you ...
2
votes
2answers
367 views

How to add new elements to PATH for daemons (or other best practices)?

I want to add some scripts for custom administrative work to a Linux server (Ubuntu 12.04). Ultimately those scripts are callback scripts from at least one daemon (PostgreSQL in my case but that ...
0
votes
1answer
68 views

How to issue a warning to administrator (when the administrator issues a system restart) when user has process running

Background I work on a development team and for each project we have a different server setup to emulate the environment of our customers. It can be hard to keep track of what I was doing on each ...
4
votes
2answers
6k views

Why using cat on binary files messed up the terminal and how?

If I understand correctly the cat manual: concatenate files and print on the standard output cat will take files as argument and print them on standard output. What I don't get is if I use the ...
5
votes
1answer
2k views

Loop through binary data chunks from stdin in Bash

I'm looking for something like while IFS= read -r -n $length str; do ... done but for binary data. Is it possible to do this using dd or other tools? Is there some technique to make these tools able ...
0
votes
5answers
1k views

On executable files in Linux [closed]

It is said that in linux, unlike Windows, there's not a clear border between executables and other files. Well, in Windows, I write a C++ program, then it is precompiled, compiled and then linked to ...
1
vote
2answers
1k views

How can I make awk on Busybox treat the entire input with NULL character in between as a single record?

I wrote a base64 encode script for my Busybox system. #!/bin/sh base64encode() { /usr/bin/awk -- ' function asc(char,l_found) { l_found=0; for (i=0;i<=255;i++){ if ...
2
votes
3answers
2k views

Pasting binary data into a Unicode terminal

I need to be able to paste binary data into a terminal. For some reason, every byte outside the ASCII range (0x80-0xff) is pasted as the same three byte sequence 0xef 0xbf 0xbd. For example: $ echo ...
6
votes
1answer
739 views

Merge nonzero blocks of huge (sparse) file A into huge file B

I have two partial disk images from a failing hard drive. File B contains the bulk of the disk's contents, with gaps where sector reads failed. File A is the result of telling ddrescue to retry all ...
-2
votes
2answers
389 views

How to handle binary data in Linux [closed]

One of the my servers gives me data with Content-Type: application/binary, i.e data that I am getting looks like some alien data. Now I need to convert that data into plain data, but I am not aware ...
3
votes
4answers
541 views

Bash: For loop with binary range keeping control value binary

Let's say I have two bash variables that contain binary values: a=0011 # decimal 3 b=1000 # decimal 8 Is there a way I can loop through all the possible values between $a and $b keeping it binary? ...
0
votes
2answers
391 views

How can I format the output of stat to contain the null character?

I want to delimit file paths by using the null character (NUL, \0, ...) just like for example find -print0 does. I'm using bash and I tried the following without success: find $1 -print0 > ...
0
votes
1answer
134 views

Solaris 10 - what is appserv and boot.server? What do they do?

I'm working in a Solaris 10 zone on legacy startup scripts in the /etc/rc3.d/ There are two items that I don't know what they do. I know how legacy start-up works but just don't know what these items ...
1
vote
1answer
3k views

MySQL aborting during initial db installation

Linux version: shell> cat /proc/version Linux version 3.2.0-4-686-pae (debian-kernel@lists.debian.org) (gcc version 4.6.3 (Debian 4.6.3-14) ) #1 SMP Debian 3.2.46-1+deb7u1 Installing MySQL ...
8
votes
2answers
2k views

How could I use Bash to find 2 bytes in a binary file, increase their values, and replace?

I'm trying to find two bytes inside binary file, then increase value of those two bytes and replace them inside file. Those two bytes are on positions 0x82-0x83. For now on I have successfully ...
0
votes
1answer
426 views

How can I create my own imagemagick binary releases?

I'm looking for a way to build ImageMagick binary distributions for deploying my app. I only need it for Kinux 64-bit (Ubuntu/Debian) and OSX. Actually building it is fine, but I have no idea how to ...
18
votes
3answers
32k views

convert a hex string to binary and send with netcat

I have a binary file that I can send with netcat: $ nc -l localhost 8181 < my.dat The file contains this: $ xxd my.dat 0000000: 0006 3030 3030 4e43 ..0000NC What I really ...
0
votes
1answer
377 views

stream a certificate to stdout to download it in php

Related Questions : when downloading certficate binary data , result is invalid certificate Download binary stream data from browser using PHP with web service “ downloaded file is corrupted ” ...
1
vote
1answer
1k views

Latest (or at least non-ancient) Chromium binary?

I've recently been migrating to Puppy Linux (last OS was Ubuntu,) and the only version of Chromium currently available is about as old as the one in the Ubuntu repositories. I really suck at have not ...
2
votes
2answers
566 views

dowload find binary , accidentally deleted /usr/bin/find binary file

I accidentally deleted all some binaries by rm -r f*, when my current directory was /usr/bin/ . So i couldn't install any files including findutils, since 'find' binary is the prerequisite for ...
17
votes
1answer
17k views

Passing binary data to curl without using a @file

Is it possible to use curl and post binary data without passing in a file name? For example, you can post a form using binary via --data-binary: curl -X POST --data-binary @myfile.bin http://foo.com ...
5
votes
2answers
13k views

How to interpret an octal or hex dump of a binary file?

The binary file has strings and some numbers, If I do od -c filename or strings filename, I can see the strings properly. But, what about numbers? They are in some weird format. The text after doing ...
6
votes
2answers
174 views

Is adding ./bin a bad idea

I can't think of any reason why adding ./bin to my PATH environment would be a very bad idea. I usually create bin folders in my projects that I am working in and I hate doing bin/command, it would ...
10
votes
3answers
13k views

How can I handle raw binary data in a bash pipe?

I have a bash function that takes a file as a parameter, verifies the file exists, then writes anything coming off stdin to the file. The naive solution works fine for text, but I am having problems ...
1
vote
1answer
1k views

Single-user binary installation location?

I'd like to install a binary for only my user, because I don't have root, and therefore don't have access to /usr/bin. I've tried ~/bin, and it can't find the binary. I'm on Mac OS 10.6.7. Is there ...
6
votes
2answers
991 views

What is produced after using cat on an image?

Let's say one creates a file like so: touch myFile You enter some text in it with vim or whatever, and then use cat myFile to spit the contents out into the terminal. Now, what happens when I use ...
2
votes
2answers
2k views

diff binary files of different sizes?

Is there a neat way to see the difference between two binary files? They are mostly the same, but some bytes are changed, and one of the files has sequences inserted in some places. Diffing the ...
0
votes
1answer
913 views

Cannot execute binary file on Linux server [closed]

I'm currently trying to run Knime (a Java-based program) on a Linux server, and every time I try to execute the file (knime) it gives me a "cannot execute binary file" error. I've posted the relevant ...
6
votes
3answers
1k views

Mystery of binary files

This is about files straight from the compiler, say g++, and the -o (outfile) flag. If they are binary, shouldn't they just be a bunch of 0's and 1's? When you cat them, you get unintelligible ...
0
votes
1answer
493 views

Is there a way to use/recompile libgio-2.0 on machine with libc-2.5?

I have a program (JavaFX 2, namely), and one of its binaries (libglass.so) requires libgio-2.0.so.0. The problem is, the system, on which I need to run the app, is quite old and mostly out of my ...
3
votes
2answers
2k views

how to find offset of one binary file inside another?

I have two binary files. One of few hundreds kilos and other of few gigabytes. I want to know whether the whole, smaller, file is contained within the larger one and if so then what is the offset from ...
4
votes
1answer
204 views

Linux from Binaries

I thought Linux from Scratch was a pretty cool tutorial, but I felt having to wait for everything to compile was a bit nerve-wreaking. Is there a tutorial similar to LFS except pre-compiled binaries ...
1
vote
1answer
1k views

How to change the default line length for od and hexdump

Is there any way to change the default line length for the od and hexdump commands? Can't see anything apropriate in the man pages.
2
votes
1answer
1k views

skype not found on Oneiric 64, but it is right there [duplicate]

Possible Duplicate: Can't execute some binaries in chroot environment (zsh: Not found) I have something weird here. Cannot find a file although it is right there. $ skype command not ...
3
votes
3answers
1k views

Is it a script or is it a binary?

At the end, it looks like it's just a regular sh script: [USER@MACHINE ~/Desktop/D] head -2 truecrypt-7.1-setup-x86 #!/bin/sh CHECKSUM=163123652 but @the scripts end: [USER@MACHINE ~/Desktop/D] ...
7
votes
1answer
5k views

How to follow (a la “tail -f”) a binary file from the beginning?

Is it possible to follow a binary file from the beginning, a la tail -f? This is useful in some cases, for example if I'm scping a file to a remote server, and at the same time I want to feed it to ...
-1
votes
0answers
108 views

what is the difference between “/sbin/nologin” and “/bin/false”? [duplicate]

Possible Duplicate: What's the difference between /sbin/nologin and /bin/false They are not having the same size. In what do they differ?
2
votes
1answer
281 views

Modifying a set of binary files

I have several binary files with the character 0x04 in them, and I'd like to add an escape \ character before each. Is there a script I can use to do this without needing to manually edit each one?
2
votes
1answer
2k views

remove carriage return character from large binary file

I have a large binary file ( nearly binary file ! ) which has many \r\n in it [ gets Generated in windows env and doesnt have controle over generating application ]. I want to remove \r from this ...
3
votes
1answer
749 views

Does research unix have any binary editor?

I cannot find any binary editor in v7 unix by reading volumn 1 of the manual. Is there any?