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3
votes
2answers
3k views

Option “user” work for mount, not for umount

I am experimenting mounting options for a program I am writing. I am running Linux Mageia 2. I added the following line to /etc/fstab /dev/sr0 /mem auto user,noauto, 0 0 and I removed all other ...
3
votes
2answers
506 views

Create custom wordlist

I want to create a custom list of (scientific) words for purposes like spell checking and OCR based on my collection of scientific papers in pdf format. Using pdftotext I can easily create a text file ...
3
votes
1answer
916 views

Writing triggers for mcelog

Just starting to look into mcelog for the first time (I've enabled it and seen syslog output before, but this is the first time I'm trying to do something non-default). I'm looking for information on ...
8
votes
3answers
19k views

IPTables - Port to another ip & port (from the inside)

I currently have a NAS box running under port 80. To access the NAS from the outside, I mapped the port 8080 to port 80 on the NAS as follow: iptables -t nat -A PREROUTING -p tcp --dport 8080 -j DNAT ...
2
votes
1answer
521 views

Can iptables be used to convert a single-homed host into a NAT server?

Given: I have a machine (HostA) with only one NIC which has Internet connectivity. I have another machine (HostB) with one NIC on the same switch. HostB is not configured for Internet access yet. ...
1
vote
1answer
513 views

compressed and uncompressed kernel on an embedded device

I have been using several different embedded boards that store kernel, init files, filesystem, etc. on partitions of a (micro)SD card. I notice in the example usage or instructions that compressed ...
3
votes
2answers
725 views

Clipboard sharing between the host OS and a virtual console of a VirtualBox linux guest

I have a CentOS guest OS running without X11. Is there anyway I can paste text from the host clipboard into the virtual terminals or highlight text in the vt via the console mouse daemon and paste it ...
1
vote
0answers
54 views

Linux shell lagging one step

I upgraded busybox from 1.2.1 to 1.7.4 in my embedded system platform and it is connected to linux host via serial cable. Now when I type any command in shell on that embedded system platform like ...
2
votes
1answer
838 views

building/compiling kernel headers

I am compiling kernel 3.4 and 3.8 for different target devices. I would like to install compat wireless driver which requires kernel header. Could anyone tell me how I can compile/build the kernel ...
3
votes
1answer
11k views

extending a partition by resize2fs

I have a 4 GB SD card. Before the image load root@ubuntu# fdisk -l Disk /dev/sdb: 3965 MB, 3965190144 bytes 49 heads, 48 sectors/track, 3292 cylinders, total 7744512 sectors Units = sectors of 1 * ...
12
votes
1answer
27k views

Best Linux Distribution for Scientific Computing? [closed]

I recently bought a new laptop to be used for scientific research when I'm at home. The machine has Intel i7 processor with 8 cores, 4 GB of RAM, and a graphic card from Nvidia (2 GB, Ivy Bridge). The ...
3
votes
0answers
201 views

Fork vs. thread system time [closed]

I got the following logs: Program 1: Taken from a program executed 64 fork calls: real 0m0.023s user 0m0.068s sys 0m0.008s Program 2: Taken from a program executed 64 thread calls: real 0m0.613s ...
4
votes
3answers
818 views

Where is the environment string actual stored?

But when we first time we adding a new name,we have to call malloc to obtain >room for a new list of pointers. We copy the old environment list to this new area and store a pointer to the ...
0
votes
4answers
2k views

What stuff can be safely removed for disk space sake?

I am using Scientific Linux. So is there any stuff that can be safely removed from disk except /tmp?
6
votes
2answers
592 views

Linux distro for a developer

I am mainly using Linux for programming. I basically started with Archlinux and Manjaro and I kinda like it. What I really like is the package management. It has a huge collection of new software and ...
1
vote
1answer
774 views

How to set up a blacklist for insmod?

I want to block a certain driver module from loading in the linux kernel. So I created a file in /etc/modprobe.d/cdc_acm.conf. In this file I added the following line: install cdc_acm /bin/false ...
0
votes
1answer
98 views

Use of .. in Linux scripting and makefiles [closed]

what is the use of .. in linux scripting and in the following makefile? MODULE = EQUALIZER = .. SRCS = include ${EQUALIZER}/xyz.mak include ${EQUALIZER}/pqr.mak
7
votes
2answers
2k views

Querying an overlayfs

I'm looking for a way to query a mounted overlay filesystem (overlayfs) in order to check it's upper and lower directory, but until now I haven't found any suitable command for that. Is there is a way ...
2
votes
0answers
3k views

sed couldn't flush stdout no space left on device? [duplicate]

What could be the reason for this error : sed couldn't flush stdout no space left on device This is come of the stuff that i am doing at last in my code sed -n '/.*needs to be executed ...
2
votes
1answer
1k views

How to write a script to read wifi SSID and password from USB drive at boot up and auto logon to wifi network

I have an embedded system that is running Debian. I want to be able to provide wifi network SSID and password information via a USB thumb drive. That way I can easily deploy it to any wifi network. ...
2
votes
2answers
378 views

Equivalent of “passwd -sa” in RHEL?

I feel a little silly having to ask this, but: In Solaris you can issue a passwd -sa command which gives you (more or less) the same output as passwd -S userName does, except it prints out the status ...
6
votes
3answers
13k views

Where is iptables script stored on DD-WRT filesystem?

I have an ASUS RT-N16 router that I've flashed with the open-source DD-WRT firmware. According to my ssh login, I'm running: DD-WRT v24-sp2 mega (c) 2010 NewMedia-NET GmbH Release: 08/07/10 (SVN ...
0
votes
0answers
112 views

How to create customized xsession in RHEL 6?

I want to create a customized xsession so that it should run at a time only one application without any desktop in RHEL 6
1
vote
0answers
93 views

SPSS temp directory space issue

I am trying to import a table data into SPSS Statistics Server, but due to space constraints in the temp directory location I am not able to facilitate the data import. I need to either increase the ...
1
vote
1answer
143 views

Routing 4 Networks

I've been trying for almost a week to make it work but without success. I'm starting to feel hopeless. I have 4 Ethernet adapters : 1: lo: <LOOPBACK,UP,LOWER_UP> mtu 16436 qdisc noqueue state ...
34
votes
5answers
72k views

How can I find the hardware model in Linux?

I used a system information utility to take the model number of a system, and also of the motherboard. DMI System Manufacturer LENOVO DMI System Product 2306CTO DMI System Version ...
3
votes
1answer
256 views

How can I delete a hardlink to a directory?

Before I get 100s of answers that tell me it is impossible to hardlink directories in linux: yes, I know that. The file in question appeared in lost+fount after I checked the filesystem with e2fsck ...
0
votes
3answers
1k views

NFS server on qemu guest

I need to know how I can mount block devices, placed on a qemu guest system, from host. So in this case we have NFS server placed on guest system and NFS client on the host's side. There are a lot ...
5
votes
2answers
1k views

btrfs and the discard mount option on an ssd

I can't seem to find an answer to this so I thought I would ask here: In /etc/fstab and when using the mount command in ext4 you would add the option discard to activate TRIM on an SSD. Similarly ...
1
vote
1answer
703 views

How to realign a disk on logical volume with minimum to zero down time

A system running un-align disk partition that needs to be aligned without loss of data on all the partition including mbr with the minimum to no down time.
1
vote
2answers
421 views

Can AMD and NVIDIA display cards work together on linux?

I know that two AMD graphics cards/two NVIDIA graphics cards can work together ,e.g. in xinerama/crossfire/multi-view. But if I have one AMD graphics card and one NVIDIA graphics card, can I use them ...
23
votes
4answers
13k views

What doesn't need defragmentation? Linux or the ext2 ext3 FS?

Why don't you have to defrag a Linux system? Because it's using the ext2/ext3 file system or because it's Linux? That's relevant, because a have a double boot system (W7 / Ubuntu) and a common ...
3
votes
2answers
507 views

Install third party software on Linux from source

What are good practices for making Linux installations? Suppose I wanted to install some so-very-useful library of my own design and documentation/reference for it on a Linux system. Which part ...
3
votes
1answer
2k views

Benchmarking Apache using ab

I was doing some performance testing for Apache using ab. Apache in our case is only working as a load balancer balancing load between two Liferay servers. Initially, I did the testing for 1000 ...
0
votes
2answers
733 views

How to create as many variables as needed from shell script(bash)?

I'm making a script for monitoring some user processes with Upstart but, since its for the company I work for, they asked me to do it generic...how's so? Well, the number of processes being monitored ...
1
vote
0answers
101 views

what does the linux standard base specify about the kernel?

I was taking a look at the Linux standard base (lsb) and could not find much interesting info on the kernel. Does the LSB specify anything at all about the kernel or kernel interface? Is it kernel ...
0
votes
1answer
539 views

What is the meaning of “\_” in output of 'ps ef'?

When I executed ps ef command in a linux server, I saw that one of the command starts with \_. For example, \_ /bin/sh /usr/ Could any one please let me know what is the meaning of \_ in this ...
1
vote
3answers
4k views

Virtual Interface Not Showing up in ifconfig?

I am trying to create a virtual interface for the purpose of NameBased Virtual Hosting on my CentOS linux box; please find below is the devices' information:- DEVICE=eth0 BOOTPROTO=dhcp ...
10
votes
1answer
24k views

How to get proccesses currently running semaphores by /proc?

I wonder how to get processes currently running semaphores by /proc ? I guess it's possible by SysVIPC subdirectory.But I don't know how to use this commands. Ubuntu 12.10
9
votes
1answer
611 views

Finding all the hard-links of a file without traversing the file system

I have seen in this page that inodes have a link counter to know how many files (read: "directory entry") point to this inode. Is there a way to know which directories contain such entries without ...
6
votes
3answers
2k views

Can I pipe any two processes to each other?

In this page from The Design and Implementation of the 4.4BSD Operating System, it is said that: A major difference between pipes and sockets is that pipes require a common parent process to set ...
2
votes
1answer
497 views

ssh/scp works but rsync just constantly says “no”

Hi I have a windows 2003 server that I need to back up onto a linux client so I install cygwin on the Win2k3. On the Win2k3 I have enabled ssh, scp but (because the Win2k3 server uses an customised ...
5
votes
3answers
11k views

RHEL: Creating stable names for network interfaces

We have a RHEL 5.5 box with 8 interfaces. And the eth interface naming is flip flopping. Sometimes eth0 comes up on physical port 7th, and sometimes on another physical port. We want the naming to ...
2
votes
2answers
112 views

Can I use partitions made by Windows 7 in Linux?

I am planning to leave Windows and get to Linux (yet do not know which one, but it is not the question). I was using Windows 7, I have 2 partitions (C:198 GB, D:488 GB). And I have a lot of documents ...
6
votes
1answer
5k views

Keep same file owner for newly created files

This question is regarding samba file access. I have created a folder A, and under folder A created two folders B and C. And also created three users A, B and C. User A has access to all three ...
2
votes
1answer
232 views

Adding a user to a group by default

I have a group that all users on the system share. The group name is common and it is to allow for a universal fileshare for everyone on the machine. How would I make it so that all new users are ...
4
votes
2answers
5k views

Specify the sort order with LC_COLLATE so lowercase is before uppercase

Given the file: $ cat file 1 a C B 2 c 3 A b By default sort will: $ sort file 1 2 3 a A b B c C With LC_COLLATE=C so will sort in uppercase letter before lowercase: $ LC_COLLATE=C sort file 1 ...
1
vote
0answers
1k views

Install Linux Mint 14 from CLI

I'm trying to install Linux Mint 14 from a live cd on a HP Pavilion laptop. I got some problem with X and the nvidia card, which prevents X from starting (and therefore prevents the live installer ...
-2
votes
1answer
65 views

How I should load file with setkey -f

I would like to load a text on Fedora. I use this command: setkey -f "name" but the file cannot be found. I have the file on my desktop.
5
votes
2answers
389 views

Which was the very first music player application for Linux?

I'm writing an article about FOSS and Linux music players. What was the very first music player application for Linux? Was there ever a time when the players didn't support proprietary formats like ...