10
votes
4answers
33k views

how to count total number of words in a file?

I am looking for a command to count number of all words in a file. For instance if a file is like this, today is a good day then it should print 5, since there are 5 words there.
4
votes
2answers
649 views

Program for taking snap-shots of movie?

Are there any programs that would let me specify parts of a video-file (avi, mpeg, mp4, ...) and take "snap-shots" every so-and-so second/minute, and store it as a series of image-files (eg. jpeg)? ...
0
votes
2answers
193 views

How to get Apache to use upgraded PHP

I need to upgrade to a higher version of php. My current version is 5.1.6. So I am trying to upgrade php to version 5.3.26. php installed just fine in /usr/local. But at least according to ...
0
votes
0answers
119 views

nginx should not handle unicorn's request

I have a server on which I have configured Nginx and Unicorn, where Unicorn servers static pages. In my case I'm writing a rewrite rule in Nginx that, if a request comes to mydomain.com it should ...
2
votes
0answers
151 views

Automatically lock but not darken gnome shell when inactive

Gnome Shell 3.8 can be configured to darken and eventually turn off the screen after a given period without user activity. (The corresponding setting can be found at Settings/Performance.) From there ...
2
votes
1answer
878 views

Error trying to build pango (1.34.1) and harfbuzz (0.9.18) from source

So I'm trying to build pango from source (in my home directory, as a dependency to something else I need). This is on a computing cluster running SLES 11. When compiling, I get the following error: ...
0
votes
2answers
154 views

TCLBLEND FAILURE - Centos 6.4

I have been trying to use a home grown test tool and after doing an update to Centos 6.4, I am no longer able to run the tcl based tool. I am getting the following error and I have no internet access ...
5
votes
2answers
848 views

What happened to my RAM?

I am trying to understand the basics of the Linux OS. I'm running 64-bit Ubuntu 12.04 on a 64-bit CPU. The system has 2GB of RAM. cat /proc/meminfo MemTotal: 2012040 kB Question 1: Where is ...
3
votes
3answers
463 views

Delete files except n files with the “bigger” name?

I want to create a shell script that deletes old release files except last n files. In other words, only mantain last n releases when I deploy a new release. File names have this format: ...
3
votes
0answers
615 views

Foremost file naming - Recovery of file names from inodes

I'm hoping this is not a stupid question. (apologies if it is) I have been asked to recover some files from a corrupt Linux partition. The partition data is shot to pieces but i have been able to ...
3
votes
0answers
335 views

How to set CONFIG_PREEMPT_NONE in RHEL 6.4 (linux)

I am trying to tune the RHEL6.4 Kernel to handle server style load for of my application. With RHEL 6 scheduler has been changed to CFS and with RHEL 5 my application works fine. I would like change ...
14
votes
1answer
28k views

How to redirect stdout and stderr to a file and display stderr to console?

I know how to redirect to a file, and use tee; on a basic level. So $ alias outanderr='bash -c "echo stdout >&1; echo stderr >&2"' # A fake "application" displaying both output and ...
1
vote
1answer
1k views

Booting directly in debian linux without giving username and password

I would like to skip the username and password prompt at boot-up from debian linux. I want to boot directly to the system without giving username and password.
0
votes
3answers
74 views

how to compare total file

Suppose i have 2 config files such as: file 1: smtpd_sasl_auth_enable = yes broken_sasl_auth_clients = yes smtpd_sasl_authenticated_header = yes virtual_gid_maps = static:5000 File 2: ...
6
votes
1answer
244 views

using GPG key in Gajim without passphrase

I would like to use gpg key with Gajim (jabber client) without a passphrase. I have generated my gpg key without a passphrase (or with an empty passphrase, I don't know which - I just just pressed ...
4
votes
2answers
238 views

Why do we need two file descriptors when creating an unnamed pipe?

I've been reading about unnamed pipes and as I understood them they're implemented as a buffer in memory. When creating the pipe I need to pass an array of size two and it returns two pointers (file ...
1
vote
1answer
96 views

Question on understanding windows manager/desktop environment

Linux newbie here. I'm trying to understand the different desktop environments and how they work together on one machine. If I install a new desktop environment, this shouldn't change the underlying ...
5
votes
2answers
1k views

mount options shown in /proc/mounts

IIRC then the mount options shown in /proc/mounts have changed. Some time ago acl and user_xattr were shown, now it seems that only noacl and nouser_xattr are shown if these features are turned off. ...
2
votes
1answer
1k views

Mapping AltGr to left control

I mapped my AltGr key to Ctrl with the following command: setxkbmap -option ctrl:ralt_rctrl However, when displaying the bindings with xmodmap -pke I can see that the keycode is associated to ...
1
vote
2answers
1k views

Cannot boot Fedora Linux

I cannot boot the operating system on my laptop. I have three versions of the kernel installed and none of them will boot. Booting into Windows (installed in a separate partition) still works, so I ...
0
votes
1answer
158 views

Is there any tools which can be used to make ports available from any firewall network?

I have been testing my application which has TCP/UDP ports for peer to peer with the help of server signalling commands for making communication, that works when I have Public IP or Lan IP and not ...
27
votes
3answers
46k views

How to disable requiretty for a single command in sudoers?

I want to disable requiretty so that I can sudo within scripts, but I'd rather only disable it for a single command rather than everything. Is that possible within the sudoers config?
4
votes
3answers
1k views

Reading a binary file as an array of bytes or 16 or 32 bits using shell script

I am working on ARM-based modem Linux host machine and I need to read a bin file as an 8-,16- or 32- bits array. I basically need to encrypt the file in question and was thinking of just XOR-ing the ...
2
votes
2answers
848 views

scp to /home changes permissions?

This would be illustrated very nicely with an scheme. When I write "Test: OK" or "Test: FAIL" I am restarting apache server (httpd service). Basically, performing everything as root in the ...
3
votes
1answer
2k views

Is there a command line tool for analyzing audio frequency

I am planning to analyze audio via linux command line. There are a lot of analyzers out there which have a graphical interface, but since I want to make an automated input/output of this information I ...
3
votes
4answers
2k views

How do file permissions/attributes work? Kernel-level, FS-level or both?

A question that occurred to me earlier: are file permissions/attributes OS- (and therefore kernel-) dependent or are they filesystem-dependent? It seems to me that the second alternative is the more ...
2
votes
1answer
1k views

Why is wget skipping files while trying to mirror a site

I ran wget on this site: http://demo.codestag.com/geeklove/ but it only returns a single index.html wget --recursive --no-clobber --page-requisites --html-extension --convert-links ...
1
vote
3answers
967 views

Directory appears as file?

So we copied some photos in a directory across to a NTFS partition last night, and they were viewable from ubuntu. Today the directory is not accessible from Windows, and when we booted back into ...
2
votes
1answer
1k views

libvirt daemon doesn't start on Gentoo [closed]

I'm trying to use Xen with virt-manager on Gentoo system and I have some troubles with libvirt daemon. When it starts: Starting libvirtd ... /usr/sbin/libvirtd: error: Unable to initialize ...
-2
votes
1answer
672 views

Why doesn't “ping -vrf” works when ping works?

0:root@SERVER:/root # ping IPADDRESS PING IPADDRESS (IPADDRESS): 56 data bytes 64 bytes from IPADDRESS: icmp_seq=0 ttl=254 time=0 ms 64 bytes from IPADDRESS: icmp_seq=1 ttl=254 time=0 ms 64 bytes from ...
3
votes
2answers
1k views

How to mount an OpenBSD hard disk image on Linux?

First, I'll start by explaining how I got my problem, this will help me get across what I need. A few months ago, my laptop hard disk broke. I had no quick replacement, but I needed that laptop the ...
2
votes
1answer
4k views

How to execute php file as different user securely?

I want to confirm that my thoughts are correct as this is about security matter. We have web based application which is using db2 database. db2 runs under the db2inst1 user. Now we want users of the ...
2
votes
2answers
7k views

Determine if reboot is required to update kernel?

I am running a server which runs on CentOS with cPanel (latest version) and I have it set to automatically update using yum. Since it needs to be rebooted in order to update the kernel (and possibly ...
4
votes
2answers
21k views

How to add a unix/linux user in a bash script

Here's my test bash script. I'm not able to get it to work. I'm seeing two errors: Use of uninitialized value $answer in chop at /usr/sbin/adduser line 589. Use of uninitialized value $answer in ...
1
vote
1answer
427 views

Base permissions on a fat32 usb drive

On linux, the base permissions for directories is 777 and for files, it is 666. Thus, with umask=022, new files are 644 and new directories are 755. But when I mount a usb drive with fat32 ...
2
votes
2answers
568 views

How can I use bindkey to run a script?

In the Z shell, how can I use bindkey to bind a key sequence to a script?
1
vote
1answer
438 views

generate SCRAM-SHA-1 hash of a password

I am looking for a simple way (perhaps using openssl) to generate SCRAM-SHA-1 hash of a password for use for Prosody Jabber Server. The passwords on the server are stored in the following form: ...
1
vote
1answer
2k views

Why does building an Android kernel need a toolchain, but compiling the entire source does not?

As seen here, compiling the Android kernel requires a prebuilt GCC toolchain (or the equivalent from the Android NDK). Cross-compilation makes sense; we are compiling code for a device with a ...
2
votes
1answer
255 views

SSH Authentication Mechanism

Doing a personal research project and I'm wondering: Why does SSH do its own mechanism negotiation rather than use SASL? At first I thought it might be to ensure confidentiality of the whole session, ...
2
votes
3answers
1k views

how does built in commands of a shell implemented in Linux? as a function or thread of shell process?

I know that external commands are run in the shell by creating a separate process. But what exactly happens when a built in command is run in a shell. Are they executed as a function or if the shell ...
2
votes
2answers
247 views

linux & solaris - separate netmask IP's from ordinary IP's

I have file with IP address and netmask IP's my target is to cut the netmask IP's from the file_with_IPs.txt and paste them to another file as file_with_only_netmask_ips.txt remark - netmask IP can ...
4
votes
3answers
541 views

What exactly did mv /tmp/folder/* /* do to my filesystem?

It's hard to search for special characters on google, which is why I'm posting this here. I recently ran (as root) a mv /tmp/folder/* /* when I meant to run mv /tmp/folder/* ./ Big mistake! Things ...
4
votes
2answers
5k views

What files does authconfig modify on RHEL?

I am trying to allow RHEL to use login accounts that are created on the system, but use the passwords from Active Directory. I have seen someone use: authconfig \ --enablekrb5 \ ...
3
votes
2answers
1k views

Application deployment over ssh

My job requires frequently updating versions of Centos-compiled software on customers PCs over multiple ssh hops. Recently this got to the point of unmanageable by hand. What software can be utilized ...
2
votes
1answer
3k views

“PS/2 Generic Mouse” gets lost. How to reload without reboot?

I am running Ubuntu 12.04LTS on a ThinkPad E420s. My Trackpoint is recognized as "PS/2 Generic Mouse". My problem is that it doesn't load/disappears after booting or after suspension. I can't move ...
0
votes
1answer
750 views

Lotus Note installation on Linux Mint 14?

I'm trying to install IBM Lotus Note 8.5.3 on Linux Mint 14 using terminal. Problem is that it's not installing and showing following error sudo apt-get install ibm-lotus-notes-8.5.3.i586.deb Reading ...
2
votes
0answers
1k views

reprepro and gpg-agent - passphrase won't be cached

I'm getting a little frustrated here, maybe you got an idea what the problem could be: I have a buildprocess with a few reprepro commands at the end The buildscript is executed with sudo ( cd ...
10
votes
4answers
6k views

chmod recursive permission on thousands of files

This is a more general question about 'chmoding' recursively. I have this script which at some point needs to change the permissions recursively in a folder which has a few hundred thousand files. ...
1
vote
1answer
123 views

Cron job doesn't seem to be executing in ubuntu

I have a script located /myscript/script.sh and I have a cronjob that I submitted like this: sudo crontab -e The contents of the crontab are as follows: */1 * * * * ./myscript/script.sh The ...
1
vote
1answer
33 views

Do live (versions of) unix distributions ever automatically pick up config info from a OS already installed on the machine?

Maybe this is a silly question, the answer is probably no; but I gotta ask. For example, if I have an Ubuntu Live USB running on a machine with Ubuntu already installed, might the Live OS ever look ...

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