Unix is a multitasking, multi-user computer operating system originally developed in 1969 by a group of AT&T employees at Bell Labs.

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Very simple, single-user, hardcoded password FTP server for ubuntu

I have just mounted a Ubuntu box and would like to quickly spin a really simple FTP server that gives access to this server to upload the files. I just need a single user and I can create the password ...
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1answer
24 views

Are file systems like SFS and UFS still used today?

I have read the Wikipedia pages for both these file systems: SFS (Smart File System) UFS (Unix File System) but I couldn't find a real answer. For example, for SFS the common Operating Systems ...
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2answers
34 views

Linux terminal for virutalization purposes, no X windows

I was wondering if I could download a linux distro somewhere that just featured the terminal with no GUI. Would this be possible in a Ubuntu liveCD?
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42 views

change permissions to a directory to 701

I'm supposed to change permission to a ~ directory to 701, thing is this is a web programming class and I know nothing of unix. I managed to get remote access and I can execute commands, so can anyone ...
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27 views

SQLServer compatibility with DoctrineDbal and Unix/Linux

I'm designing a solution for a web portal. This portal will use the micro-framework Silex which provide database access through Doctrine DBAL libraries. My target DB is a SQLServer 2008 which is ...
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1answer
28 views

find boot-up script on any Linux/Unix installation

I need to run a program on boot-up and install the corresponding code into the system startup-script. Unfortunately, not all are using the same system: I checked Debian and CentOS and they use ...
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1answer
81 views

Copy and paste text by using mouse, just as the functionality works in UNIX

Please excuse my ignorance, and possibly laziness if a similar question has already been asked. I am a UNIX user, and I am new to MAC. I am so used to copying text on UNIX by just clicking left ...
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3answers
46 views

How to list file names on Windows as the Unix find command?

I'm looking for an equivalent command line on Windows to the following Unix command: find test -name '*.txt' -print This command lists every filename which is in the 'test' folder and subfolders, ...
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2answers
33 views

What is a better approach for ZFS?

I am making zpools on FreeBSD machine. While creating zpools I observe these two cases:- If I take raw disks and create zpool then I am able to form zpools and they are working perfectly. If I ...
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36 views

Windows 7, repetition of audio tick.wav, like those Unix guys can do, from other application.

At org-pomodoro_resources at master · lolownia_org-pomodoro · GitHub / resources, there is a tick.wav file, to be played repetitively, from Emacs. I have tried start, wmplayer, vlc, play (sox), and ...
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1answer
15 views

Parallel data to file

this question is about catching printer data and writing it in a file. We use an old Unix system which is unfortunately crucial. This Unix system uses a matrix printer. This printer seems to get its ...
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42 views

Get growl notifications from within a unix screen which is not in focus from a remote SSH session

Using iTerm2 I have growl notifications working within a (unix) screen session on remote servers when that window has screen's focus: My server's ~/.bashrc has: growl() { local ...
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1answer
312 views

Fedora17: yum update not working

I am new to linux environment and I have been assigned the task of installing a browser in my system (which I feel a really tough work in linux as a first time user). When I am trying to run the ...
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1answer
36 views

Shell Command that Combines chmod and chgrp

Is there a combined variant for chmod and chgrp that sets both user and groups permissions in one single system call for each file? This is useful for increasing performance on slow data layers such ...
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2answers
65 views

How to delete half of the files in a directory?

A directory has files with names ending 001 to 100. How can you delete 2,4,6,8...100. And can that be written as a script. As soon as the directory becomes week old, this has to run. And after a month ...
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1answer
59 views

how to mass convert .xml files in a directory to UTF-8 while retaining the same filename

I have many .xml files that are encoded in ISO-8859-1, and I want them all in UTF-8. I figured out the code to convert them individually which is : iconv -f ISO-8859-1 -t UTF-8 filename.xml > ...
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1answer
40 views

Unix2Dos: can't stat - what does this mean, why does it happen?

I've got a txt file that has Unix newlines and needs to have Windows newlines. I try to do unix2dos filename.txt but I get Unix2Dos: Can't stat 'filename.txt'. In fact, it says Can't stat 'xxx' for ...
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34 views

Edit bootable img file on mac OSx

I have downloaded a bootable image of ubuntu (7.95Gb .img file) for a Parallella (minicomputer), but its too big to fit on my 8 Gb micro sd card (which actually is only 7.8 Gb!). I would like to ...
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2answers
81 views

Is it possible to install OS Windows 8.1, Windows 7, Windows Server 2012, Oracle Linux, Oracle Solaris, Fedora Linux?

I'm planning to have 6 operating systems in my laptop. And wanted to have more in the future. I want to install 2 versions of desktop OS in windows (7 and 8.1) and a server OS in windows (Windows ...
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37 views

In the Terminal is there a way to search for a command you previously entered? [duplicate]

In the Terminal is there a way to search for a command you previously entered? Say you typed something in just a moment ago, you can press the up arrow. But if you typed it in hours ago, or a day ...
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1answer
13 views

in Unix reading a beginning of a filename and inserting it to another file

Could anybody tell me what is the best way to copy fragment of a filename, for example axheMyfile.txt, read first 4 unique letters and copy that to a new tabdelimited file to be merged with another ...
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8 views

Unix environment variables for Unix-derived apps in Windows

My problem is that cross-platform apps initially written for Unix/GNU+Linux trash my Windows filesystem by placing files wherever they can. In most cases this can be solved by setting environment ...
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1answer
37 views

How do I make less open binary files without confirmation?

I have several log files that contain a few bytes which are not displayable characters (due to binary signatures on the requests). Every time I open them with less I get asked: $ less ...
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38 views

Installing APK's through mobile terminal ide?

I was wondering if you could manually install apks that are downloaded onto the SD card of my android tablet. I'm looking for something similar to the sideload command when connected to a computer. I ...
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2answers
67 views

Compare two files and output the differences

I am aware of diff and using loops but I just cant seem to really get what I need with diff. I'm basically looking to compare two files (file2.txt and file2.txt) and just get the output of what is ...
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2answers
43 views

How to find the common paths from a list of paths/files

Prelude: Given a sorted input of a list of paths/files, how to find their common paths? Translating into tech term, if feeding the sorted input from stdin, how to pick the shortest proper prefix ...
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1answer
30 views

including timestamp in file name

I tried to create a file like this to put a timestamp in the file name vim Customer1-$(date).txt The result was Customer1-Sat.txt, however, I wanted the full timestamp Sat 30 Aug 2014 09:41:27 PDT ...
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4answers
307 views

Why does the root directory '/' have a reference to its “parent”?

I'm currently developing a fake filesystem for a browsergame. I recently implemented ".." and "." folders so every folder has a reference to its parent. Then I checked in my terminal if "/" also has ...
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63 views

ksh script using if break statements

I have a script file that has the server details like set -A SERVERGRPS SERVERS_CA SERVERS_NY set -A CA ca126 ca546 ca 642 set -A NY ny112 ny113 ny114 now I have to write a another script which ...
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1answer
31 views

Linux bash iterating and Break

I have two server groups SERVERS_CA AND SERVERS_NY. I will have a array something like SERVERGROUP=(CA NY) CA and NY will have set of servers in arrays like CA=(ca126 ca546 ca 642) NY=(ny112 ny113 ...
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1answer
136 views

Cannot change directory into home directory, although permissions are set correct

I guess I need some help from an advanced Unix user... On a Ubuntu System I did something stupid. I typed sudo chmod 774 .* or the like, in a subfolder of my home folder and then I suddenly could not ...
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114 views

Tar withour directory structure and exclude folders

I am trying to create a tar file to exclude certain folders and then I want to have a tar file without the parent directory structure. I am able to exclude folders, but when I extract I see path from ...
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1answer
505 views

boot2docker mount windows share

I am running boot2docker on windows and I am trying to access a shared folder on my host from the VM. I have executed the following sudo mkdir /mnt/docktest sudo mount -t cifs ...
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2answers
675 views

Copying folder from one Unix server to another, updating owners IDs

I'm using the method described here to copy a directory from one Unix server to another (both Ubuntu 14.04): rsync -aruv localfolder/ user@server:destination/ I need to keep the same owners and ...
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1answer
116 views

How can I get more information from Curl regarding a FTP 425 “Cannot open data connection” error?

I am trying to upload a file with the following line: curl -3 --ftp-pasv --ftp-ssl-control -v -i -T ./mybigfile.gz ftp://lawrence@mecloud.xxxxxxx.co.uk:21/OnlineBackup/Lawrence/ --insecure -u ...
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51 views

Unix Multi-Group Permissions

I am trying to do permissions to a folder for multiple groups, each will have different permissions to the directory. Can you let me know how to do this without editing the ACL's? Group 1 RW Group 2 ...
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23 views

Message queue doesn't exists any more after reboot/shutdown of the virtual machine (Ubuntu)

I'm working on a simple multithread client/server program in C using native message queue of unix to send messages from one client to another. It works fine, but my problem is that after a reboot or ...
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1answer
66 views

Memory usage of a process in a shell script

I want to find out the memory usage of a process in a shell script.I tried to use this piece of code : while[process] do if [ -e /proc/$pidno/statm ]; then m=`awk '{OFS="\t";print ...
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17 views

UNIX command tcpdump for certain filetypes like xml

I use the unix command tcpdump with these extensions -A -s0 -ien0 port 80 I know how to add, for example a new host, that would be and \ host random.com Can i sniff for certain filetypes? I have ...
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3answers
457 views

Creating a large file of random bytes quickly

I want to create a large file ~10G filled with zeros and random values. I have tried using: dd if=/dev/urandom of=10Gfile bs=5G count=10 it creates a file of about 2Gb and exits with a exit status ...
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1answer
33 views

What is the easiest way to convert a bunch of text files from LF (Unix) to CRLF (Windows) in a single run?

There is a directory tree on a Windows7 machine containing a few hundred text files that I want to convert from LF to CRLF. I already found a Win32 version of UNIX2DOS but that one accepts only one ...
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1answer
48 views

Iostat and top show static resource usage on first value

For one of my projects, I need to obtain resource (CPU, I/O and disk-space) usage programatically. Currently I'm running shell commands (iostat) and parsing the results which works relatively well ...
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1answer
303 views

Multiple unix pipes not working

This first pipeline works fine (printing "c"): echo "a" | sed 's/a/b/' | sed 's/b/c/' This one does not do what I expect (nothing gets printed when I feed an "a" into my fifo ): mkfifo fifo; cat ...
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57 views

Why isn't the loop back interface replying to injected ICMP echo request?

I want to be able to send IP packets from a userspace program and receive responses on a TUN interface. To test, I'm injecting ICMP icho requests to the loopback interface from a user space ...
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1answer
72 views

Unix BIOS/Boot Record on USB Flash Drive

I have been trying to learn a bit more about USB drives, and am curious about their MBRs. Essentially, I open up the device file of the USB drive and give a hex dump of the first 496 bytes of the ...
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2answers
55 views

Delete Directories that Contain Specified File in Mac OS X

How do I delete a folder that contains a file or folder with a specific name? E.g. I want to delete all folders that contain the file "things.txt": /dirA/ /dirB/things.txt /dirC/ /dirD/things.txt ...
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75 views

Using Tap/Tun to intercept packets at IP level

I am working on a research project involving ARP poisoning. I would like to intercept packets on the IP level. If my machine receives a packet with an IP address not destined to it's own IP ...
66
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6answers
5k views

Choosing between .bashrc, .profile, .bash_profile, etc [duplicate]

This is embarrassing, but after many years of using POSIX systems full time, I still have a hard time figuring out if a shell customization should go in .bashrc, .profile, or somewhere else. Not to ...
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2answers
98 views

How do I delay tcp traffic on a socket?

I would like to test the interactions between a client program and a server program for race conditions. They connect to each other via tcp. The client does blocking calls to the server on multiple ...
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50 views

0711-317 ERROR: Undefined symbol

I am installing a C package named expat-2.1.0 in AIX 6.1 machine. While performing a gmake it popping the below output. /bin/sh ./libtool --silent --mode=compile gcc -std=gnu99 -I./lib -I. -g -O2 ...