Questions specifically about Linux, as opposed to Unix-like systems in general, or to questions about a specific distribution or program.

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1
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0answers
31 views

error: cant't find command linux when booting system

I need some help with a problem when booting. Recently I've installed CentOS 7 on my pc, previously I had debian 7 and manjaro installed. When I installed manjaro I overwrote the bootloader of debian ...
2
votes
3answers
81 views

How to search the whole manual pages on Linux?

Sometimes I need to look up certain words through all the manual pages. I am aware of apropos, but if I understand its manual right, it restricts search to the descriptions only. Each manual page ...
0
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0answers
25 views

haproxy removing mod_expires set by apache

I've haproxy server which is routing requests to different web service instance based on rules. The web service instances have apache running at port 80. Now, I'm trying to set some expiry header by ...
0
votes
0answers
9 views

Installed Windows 8.1 not Booting from Internal HDD

I have Windows 8.1 and Linux installed on my internal HDD. Windows is installed first, it worked fine and later I installed Linux through live USB stick. After restarting nothing happened...my ...
1
vote
1answer
17 views

Query OS for hardware characteristics of wireless adapters

I have a raspberry pi with 2 wireless adapters connected to it - one has an antenna. http://www.modmypi.com/raspberry-pi/accessories/wifi-dongles/wifi-dongle-ultra-long-range-high-gain-w-5dbi-antenna ...
0
votes
0answers
20 views

Error: version `GLIBC_2.14' not found

How do I run a program that was compiled against glibc 2.14 on an old system? I'm unable to update anything. Can I download newest glibc and somehow have the program use it instead of the installed ...
0
votes
0answers
11 views

Starting Kdump: FAILED

I am unable to start kdump on my machine. It is prompting Starting Kdump: FAILED. I have edited the /etc/grub.conf file and provide 1024M to crashkernel. I have also provided the path to where the ...
2
votes
1answer
18 views

Can one physical disk provide space for several volume groups?

Can one physical disk provide space for several volume groups? Or one disk can have only one volume group in the Linux LVM? Can we use one disk in several VG's?
2
votes
1answer
155 views

CPU speed and cat /proc/cpuinfo

I use centos 6.4 64. I have old proc - CPU AMD Phenom II X4 810 (HDX810W) 2.6 GHz. However, when I execute the command cat /proc/cpuinfo I get the following: processor : 0 vendor_id : ...
1
vote
0answers
29 views

Absolute path in rsync dry-run statistics

I have executed following command in order to get the list of files that would be transferred to remote server if rsync is executed: rsync -avzm --stats --safe-links --ignore-existing --dry-run ...
0
votes
0answers
81 views

iperf3 on GNU/Linux -s -w xxxK not working

I've compiled iperf3 on an AWS GNU/Linux box and it works with just the -s, but not with -w xxxK to increase the TCP window. I've only worked with iperf2 before. Am I missing something?
1
vote
1answer
52 views

Restricting / disabling linux disk buffering in a virtual machine

Is there an intelligent way how to restrict buffering/caching in a Linux system and to make it writing on disk more or less continuously? I am asking because I am running several Linux virtual ...
0
votes
0answers
6 views

Is that safe to use kfifo (not a _spinlock flavour) in fiq/nmi handlers? [migrated]

Basically need to pass variable-size records to and from FIQ handler (ARM platform). During any get/put operation on kfifo (on the user-space/kernel side only) I am going to disable all IRQs and ...
-1
votes
0answers
16 views

You don't have permission to access /dokuwiki on this server

There is a dokuwiki installed in a server that works fine before. One day the IP of this server is changed. When I access dokuwiki with new IP, the browser states "You don't have permission to access ...
1
vote
0answers
15 views

What does ipq_ctl do?

I'm in the process of writing some rust bindings to libipq, and I came across an undocumented function in libipq.h: int ipq_ctl(const struct ipq_handle *h, int request, ...);. However, this doesn't ...
2
votes
0answers
44 views

How do I configure SSHd to require 2 (or more) passwords to log in

I'm asking because I want to setup a server that cannot be administered by any single admin, not without the permission (and oversight) of one other authorized admin (there can be many). Since there ...
1
vote
1answer
23 views

linux nat different rules

eth0 (192.168.1.0/24) --> wan eth2 (192.168.10.0/24) --> lan0 I use these rules to enable NAT on my linux gateway: iptables -t nat -A POSTROUTING -o eth0 -j MASQUERADE iptables -A FORWARD -i ...
1
vote
0answers
30 views

How do I view multiple users groups using sssd?

SETUP OS = RHEL 6.4 Workstation System is part of an LDAP domain and was originally configured to authenticate using nscd. All recommended SSSD packages have been installed. ...
0
votes
0answers
14 views

multiple file backup script at different location [closed]

I have script will match keyword from check.conf file and if match is found then it copies that file from App to Directory10 location. I have dir such as Directory10 ,Directory11, Directory12 and so ...
4
votes
2answers
34 views

Can I mount a case-insensitive tmpfs/ramfs?

I would like to utilize the performance of tmpfs/ramfs for some file operations, but the programs/processes that use these files assume a case-insensitive file system. I cannot find any documentation ...
0
votes
0answers
12 views

Auto Connect OpenVPN Client on Startup Windows 8 [closed]

I am trying to get my VPN to auto connect on startup so I don't have to always make sure that it is connected and running. I've read numerous ideas for running RegEdit ...
1
vote
1answer
27 views

How to find bandwidth usage/bytes transmitted/received within a certain time frame

I'm looking for a way to get numbers on bandwidth usage of an eth port. But I need to filter the results to only show me numbers for the last 24 hours. Or any time period in hours or minutes. Just ...
0
votes
0answers
17 views

how to use postfix alias for sending email

I am not this question has been asked or not, I have postfix running with MySQL and recently i have created "support@example.com" alias email to multiple folks get email, just like distribution list. ...
2
votes
2answers
87 views

how to grep for specific time period in a log

We work with log files that have line entries that start with a date/time format such as this: 20150408 13:29:28 <rest of text> What would I need to do in order to grep for a date range? Say ...
0
votes
0answers
10 views

What's wrong with my Arch linux grub bootup? [closed]

So ever since I did a fresh install of Arch Linux, every time it boots up and I select the Grub option it says "A start job is running for /dev/drive/" and shortly after it says timed out and ...
1
vote
1answer
28 views

How can I set permissions on a windows share from linux client

I want to write a script to set permissions on a windows share from linux client. I know that I can use smbclient, cifs or smbfs to mount windows share from linux. But I have no idea how to set ...
1
vote
0answers
29 views

Route wireless LAN through OpenVPN

I am trying to set up my home server to act as an OpenVPN gateway so I can connect to my VPN from any device without installing special software of them. My server is running Ubuntu 14.04. The host ...
0
votes
1answer
39 views

Set home directory of a user to root?

I would like to set the home directory for ftpuser to root. That's my command: # adduser ftproot -shell /bin/false -home /var/www What is the directory term for root?
2
votes
0answers
275 views

Can I make the boot even more verbose than loglevel=7 using kernel parameters?

I have an error when booting on a machine, my machine is stuck with the error message: Booting a command list. I can see this message when I add loglevel=7to the kernel parameters via grub boot ...
0
votes
2answers
16 views

non-breaking space sometimes appears in Geany (my standard text editor)

I use Geany for all my coding, in my linux Mint-MATE install. Occasionally, i have a problem where a non-breaking space (char code 194) is present instead of a normal space character (32). This just ...
-1
votes
0answers
21 views

What package should I install to fix this failed dependency issue? [closed]

I'm not entirely sure which package is missing. It keeps giving me this error. [root@indexunixma /]# rpm -ivh samba3-client-3.6.3-44.el5.x86_64.rpm warning: samba3-client-3.6.3-44.el5.x86_64.rpm: ...
1
vote
1answer
19 views

What are `gom-*miner` processes?

I've got few running processes that eat up all my resources, blocked network and disk I/O, after some time whole computer froze, I couldn't even go to classical non-gui terminal. I've found them ...
1
vote
0answers
12 views

How to route vpn traffic over hostapd-raspberry pi

I have a raspberry pi running hostapd and I am able to connect my laptop as a wifi client to the raspberry bi wifi router. The problem is with the vpn traffic, I cant connect to my office vpn with ...
0
votes
0answers
5 views

AWS dist packages [closed]

while in local getting /site packages. for python , and running in AWS its showing dist packages., and how can I get idea about installing django and the kid things in it.. and work inside that server ...
1
vote
0answers
21 views

Loud persistent fan on Linux Mint 17 with discrete graphics card

I've been running Linux Mint 17 for the last half year with no fan problems, but last week the laptop fan turned on and hasn't stopped since. I hadn't messed around with bumblebee or nvidia drivers ...
0
votes
0answers
13 views

Increase multipathed filesystem journaling threads?

We have some hardware which is utilizing multipath to speak to backend storage. A situation has been observed which some are attributing to too few journaling threads being allocated by the kernel. ...
1
vote
1answer
13 views

Mount iscsi drive at boot - system halts

I am running Oracle Linux 7 (CentOS/RH) in a Virtual Box VM on a Mac with OS X 10.10. I have a Synology Diskstation serving as an iscsi target. I have successfully connected to the Synology, ...
3
votes
0answers
21 views

How to generate graphs from lmbench results?

I need to use the lmbench benchmarking tool to get the system performance statistics. I am able to execute and run the results. In the results folder this is a MakeFile with this information # ...
1
vote
1answer
33 views

Saving power on a linux cluster

I would like to buy a cluster (30-60 nodes) for work and install linux on it. The cluster should have a queue system like PBS, for instance. It should also be capable of doing parallel computation. I ...
0
votes
1answer
95 views

broadcom BCM43142 under kali linux

I am trying to get the wireless card of my laptop (Broadcom BCM43142) to work under kali linux (latest version, 64bit). At the moment (without installing anything), it is not recognised at all. I have ...
1
vote
0answers
10 views

Using apprarmor/grsec to gain capabilities for file

I know that using apparmor, one can reduce process capabilities(7). But is it possible to gain them? For example: ping requires CAP_NET_RAW. It's binary has no suid set and doesn't have any file ...
3
votes
2answers
13 views

How and where is file system meta data cached in Linux

My earlier question apparently had a wrong premise. I thought file system meta data was cached in the inode and dentry cache, but apparently not. When I do: # time find . > /dev/null real ...
1
vote
1answer
36 views

Remapping Caps Lock to Compose

Because I now and then need to use scandinavian letters despite using US Dvorak as my layout, I would like to use Caps Lock as a compose key. (I don't need Caps Lock at all, I'm not a forum troll) ...
3
votes
1answer
49 views

Remount a busy disk to read-only mode

I want to force a disk partition to read only mode and keep it read-only for more than 30 minutes. What I have tried: mount -o remount,ro (partition-identifier) (mount-point) -t (filesystem) ...
0
votes
0answers
25 views

How should my program behave to handle errors? [migrated]

I have written a program (with code from SO) that does printenv | sort | less and now I should implement error-handling. How can that be done? The program should fail gracefully, for example when ...
1
vote
0answers
27 views

Svn Error on import time no space left on device

When I import file in svn repository I get following error . svn: E000028: Failed writing updated file: No space left on device Following is mine diskspace and inode details # df -i ...
1
vote
2answers
35 views

Systemd dependency tree saving

As I know systemd stores dependencies between services in unit files. I need to know how systemd behaves on boot: Does it load unit files from specific paths and recalculate dependencies every time ...
0
votes
0answers
23 views

Connect multiple bluetooth devices to multiple bluetooth usb adapters

I have lots of bluetooth devices that need to connect to a Raspberry Pi. Currently I have a scanner script that locates and connects to each device. My current limitation is the fact that a one ...
0
votes
0answers
23 views

I chowned / recursively. How can I restore default permissions? [duplicate]

In a completely boneheaded moment, I ran the following command: #chown -R user:usergroup . What I failed to realize is that I was in the root directory, not in my target directory. Now the entire ...
0
votes
0answers
18 views

Incorrect installation of python-2.7.2 - cannot use zlib

I am installing python 2.7.2 from Python-2.7.2.tar on Linux Ubuntu-14.04. I untar it, then ./configure --prefix=/apps/python/install/2.7.2. I then make and get : Python build finished, but the ...