3
votes
1answer
12k views

copying files from one directory to another

I have to copy a set of files from one folder to another folder and I'm using the following command: cp -rf `head -n 100 /home/tmp/abc.txt` /home/tmp/test/files the file contents in abc.txt is like:...
14
votes
4answers
12k views

what do I need to do with “man: can't set the locale; make sure $LC_* and $LANG are correct”

I typed man sudoers but got man: can't set the locale; make sure $LC_* and $LANG are correct No manual entry for sudoers What does this mean?
3
votes
3answers
42k views

How do I know a specified user's permissions on Linux with root access?

I have root access to my local server. And some days ago my colleague created a user on that server, giving me the uesrname and password. But the user has a minimized permissions. Like the user can't ...
3
votes
2answers
2k views

Speed up zgrep on a multi-core computer

I'm running zgrep on a computer with 16 CPUs, but it only takes one CPU to run the task. Can I speed it up, perhaps utilize all 16 cores? P.S The IO is just fine, I could just copy the gzipped file ...
2
votes
1answer
399 views

RTL8180 kernel module freezing with Realtek RTL8185L chipset

I've recently purchased a PEAK wireless PCI board. I needed a card with removable antenna capability to test a high gain antenna that I had laying around. Went to my local hardware store and I got ...
3
votes
3answers
9k views

Escaping * with Regular Expressions and Grep

I have a file that has unique lines that start with 2 stars (**). However when I run a grep command for grep \*\* fileName I get all of the lines in the file. This is very unusual, and what I ...
3
votes
2answers
3k views

Using FFMPEG to stream to Twitch.tv with desktop audio?

I've been trying for the last hour or so to stream to Twitch.tv with desktop audio in the stream. Currently, I'm able to use this to get a video to display on Twitch: #! /bin/bash INRES="1280x800" ...
3
votes
1answer
521 views

zsh and COLUMNS

I cannot understand the behavior of the $COLUMNS variable under zsh. Here's an example of the sort of behavior I'm referring to. The script $HOME/cols.sh is the following: echo "COLUMNS=$COLUMNS" ...
4
votes
2answers
548 views

How change prompt of subshell

I'm trying to create a simple script that, among other things, will create a subshell: #!/bin/sh # setup "${@:-$SHELL}" # teardown The question is: I need to change the default prompt, so for ...
2
votes
2answers
726 views

Dovecot POP3S & IMAPS SSL Certificate that works for all user domains

This may be a really stupid question, but I can't seem to put my head around it. I have a mail server I'm trying to setup to service 6 domains. I will have multiple mail users accessing the server via ...
1
vote
1answer
476 views

Package php5-json breaks firephp

Background Recently I upgraded php to version 5.5. Within this upgrade module for json was moved out from php5 package into a new package php5-json. So I installed it. Now the connection with ...
3
votes
3answers
11k views

Handbrake for wheezy?

Has anyone figured out how to install/backport a Debian Handbrake package on Debian wheezy? The only version of Handbrake currently in Debian is in experimental, and the dependencies are not available ...
2
votes
1answer
1k views

Port Forwarding using iptables on Open-Mesh

A quick overview for those who are unfamiliar with Open-Mesh: The system uses small wireless access points that automagically build their own mesh network. As long as one of the access points is ...
4
votes
1answer
3k views

How can I sort a list of file names by some substring of the name?

I have a number of files with names like: beginning_num1_734_num2_1.363e+12_num3_800.pdf beginning_num1_735_num2_7.453e+13_num3_800.pdf beginning_num1_1007_num2_9.453e+12_num3_1200.pdf I'd like to ...
6
votes
2answers
7k views

How to display the name of the current Virtualenv?

I'm using virtualenv, virtualenvwrapper, zsh, oh-my-zsh, terminator, on Crunchbang. I'm trying to display the name of the current virtualenv like so workon example (example)... I've tried many ...
0
votes
1answer
157 views

C-library HMAC_MD5 questions

We are working with an older software product that has some limited programming capabilities - specifically, no bit manipulation functions. This has created a significant problem as we need to ...
3
votes
2answers
183 views

Absolute path to currently-running zsh?

Sometimes the output of ps -p $$ shows the absolute path to the currently-running zsh, % ps -p $$ PID TTY TIME CMD 1027 ttys005 0:00.11 /usr/local/bin/zsh but not always: % ps -p $$...
2
votes
2answers
2k views

Booting into shell instead of graphical interface [duplicate]

I have a laptop with lubuntu. It's great but I wish LXDE was optional instead of autostarting. So my question is, what can I do to make it boot directly into a text only mode, not loading anything ...
1
vote
4answers
208 views

All subprocesses are Bash (!),

I was trying to use GDB, and found that whenever it attempted to spawn the program I was debugging, Bash was spawned instead (GDB would say starting myProg..., and then Bash would appear. When I ...
2
votes
3answers
537 views

Does a fault in a kernel module necessarily result in a system crash?

Or is it possible to overcome the fault, since the code isn't in the monolithic part of the kernel?
2
votes
1answer
2k views

Cent OS + VSFTP, 553 could not create file, how to allow uploading of files?

I have a ftp server running on Cent OS VM. the goal: public map can be seen by everyone (readonly for anonymous users, write for logged in users) upload map can only be seen by local users logged ...
6
votes
1answer
5k views

find and rysnc?

I want to be able to search for files over 14 days and over 10k and than rsync those found files to a destination. Is there a way to combine these two commands? find ./ -mtime +14 -size +10k rsync -...
0
votes
4answers
1k views

Align Partition Of HDD Using fdisk?

I first asked this question on SuperUser.com but got no responses. I have found how to align the partition of my SSD using fdisk (SSD article on Gentoo Wiki) but haven't been able to find any ...
33
votes
5answers
55k views

How to easily build your own Linux Distro? [duplicate]

I wanted to have a go at creating my very own Linux Distribution. Could you suggest some nice and easy-to-follow tutorials (preferably text based and not videos). I have heard something about Arch ...
2
votes
2answers
396 views

Is it possible to assign multiple commands to a single hotkey? (bash, xterm)

Back in the day, if my cursor was in the middle of a really long shell command I'd just hit Ctrl+C to get myself a new command prompt. Then I learned about Ctrl+K/C and life was good. Unfortunately ...
3
votes
1answer
1k views

Connection error for linux webcam driver for matlab

This might seem like a duplicate post, well yes it is, but I have a different problem compared with the duplicate version of it. My value for imaqhwinfo gives me: InstalledAdaptors: {'dcam' '...
1
vote
2answers
802 views

Why the inconsistency with using cat vs. echo piped to this sed command?

Inspired by this question: sed: N command does not read single line I wanted to understand why there appears to be an inconsistency between the following 2 commands: #1. echo This command produces ...
0
votes
0answers
31 views

Is there something as flexible as crontab for user-level autostarts? [duplicate]

I'm looking for a flexible per-user initialisation tool to kick off user daemons when the system (re-)boots. I suppose something similar to crontab would be great, which works for every user ...
2
votes
1answer
89 views

How do I skip special buffers when killing the current buffer?

I have some code in my .emacs that prevents it from showing some pre-defined special buffers when I'm using previous-buffer and next-buffer: (defadvice next-buffer (after avoid-messages-buffer-in-...
1
vote
1answer
1k views

sed: N command does not read single line

Why sed's N command does not read single line? # single line without \n $ echo -en 'abc' | sed -n 'N;p' $ # I expected 'abc' # single line with \n $ echo -en 'abc\n' | sed -n 'N;p' $ # I expected '...
3
votes
2answers
305 views

Log in as one user but authenticate as another

This might be a weird question but I wonder if there are possibilities to this. When I'm configuring a system I prefer to be root so that I don't have to sudo everything. However, the root account is ...
3
votes
1answer
330 views

watch command to delete files in a directory every N secs

I thought of using watch command to delete files in a directory every N seconds with the command running in background. This is what I was planning to use: nohup watch -n1200 rm -rf /var/log/radius/...
11
votes
1answer
3k views

Why is this empty directory 3.5MB?

I've just read this question: What does size of a directory mean in output of 'ls -l' command? ...which doesn't quite answer my question. Basically, I'm moving files onto a NAS. The folders I'...
2
votes
2answers
2k views

Faster way to find matching patterns from external file grep -f {patternfile} {source} in BASH

In *nix terminal (Bash) os there any other faster way to find a pattern (or excluding them - egrep -v option) than using this: grep -f {patternfile} {source} Using this option is painfully slow for ...
4
votes
1answer
3k views

Verbose output of ./configure not verbose at all

I have a problem installing OpenOCD: checking for ftd2xx.h... yes checking for library containing FT_GetLibraryVersion... no Said library is installed and tested. In hopes of seeing where is ...
3
votes
1answer
4k views

PHP + Exim4 on Debian - mail does not get delivered

I have a fresh Debian installation with LAMP. There is a PHP script that sends email messages to arbitrary addresses using the mail function, but it does not work - the messages don't get delivered. ...
2
votes
1answer
663 views

kill all process of executables in a folder

I need to kill all the child process. The main process in lmbench pkill -9 lmbench is not killing it, but kill -9 <pid> kills the parent process, but even after killing the parent ...
16
votes
3answers
24k views

How do I download from SourceForge with wget?

This question explains how to do it with curl. The accepted answer also points out that If wget is available, that would be far simpler. I looked through mam wget but the got lost in there, and ...
0
votes
3answers
12k views

How to download files from a remote Linux (Ubuntu) Server? [duplicate]

How can I download files from a remote Linux Ubuntu server? I have access to this server, but I don't know a convenient way to download a file from there using SSH (PuTTy), for example. Any ...
6
votes
1answer
19k views

Change the number of rows and columns in the TTY [duplicate]

I want to resize the terminal which comes up when you press CtrlAltF1 (or F2,F3,...). 25x80 is small for a 24" screen. Tried using stty, but the commands stty columns 200 and stty rows 50 does not ...
0
votes
1answer
230 views

Will purging GNOME remove gedit? [closed]

If I remove the GNOME desktop environment from my Debian 7 installation, will that also remove additional applications like gedit or will they remain installed and usable?
39
votes
3answers
6k views

Does the kernel have a main() function? [closed]

I am learning device drivers and Kernel programming. According to Jonathan Corbet's book, there is no main() function in device drivers. So I two questions: Why don't we need a main() function in ...
2
votes
2answers
2k views

Install kernel-devel of specific version in fedora 19

So I have different "installed" kernel versions from the running kernel version, on my fedora 19 machine. To give a more clear idea, here is my terminal output: [user@home ~]$ uname -r 3.10.3-300....
18
votes
3answers
11k views

How to SSH into a specific directory?

I frequently login to a server, then cd into a specific directory. Is it possible to simplify these two commands into one? ssh bob@foo cd /home/guest I'd like to avoid changing anything on 'foo' ...
1
vote
1answer
212 views

ext4 drive takes forever to ls?

I've had an external HDD formatted in ext4 for a while. For some reason, it's started to take forever to list directories. Sometimes just running ls /mount/point/of/drive takes minutes, sometimes that ...
4
votes
1answer
270 views

Strange ping behavior

I built a linux distribution using the Yocto Project, with little customization. It runs on a Single Board Computer. When I ping this machine, I get the following result: PING 10.128.11.1 (10.128....
7
votes
3answers
4k views

Swap alt and super

I have a Macbook Air that runs Linux. I want to swap the alt and super keys in both sides of the keyboard with each other. How do I do this with cli tools? Update Following Drav Sloan's answer I ...
3
votes
4answers
7k views

Can tr work with regex?

I have a file like this: AAAA BBBB CCCC DDDD etc Words in separate lines. I want to add them quotes using tr. So I tried the following: 1) To add a quote in the start of each word i....
4
votes
3answers
23k views

delete subfolders without deleting parent folder

For this type of dir structure : /config/filegroups/filegroupA/files/fileA1.txt /config/filegroups/filegroupA/files/fileA2.txt /config/filegroups/filegroupB/files/fileB1.txt /config/filegroups/...
1
vote
1answer
694 views

Does zip's -u flag pay attention to deleted files?

This website about Linux's zip utility says this about the -u flag: Replace (update) an existing entry in the zip archive only if it has been modified more recently than the version already in the ...

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