1
vote
1answer
358 views

How do I format c while installing Ubuntu?

I would like to try out Linux but I did not find how to format c while installing. There are 3 requirements at the beginning: 2.6 (?) GB storage Internet - this is ok And something else I have ...
4
votes
2answers
4k views

Making an ext3 filesystem image without mkfs.ext3

On ubuntu I'm using the following to create a ext3 filesystem image system.img. dd if=/dev/zero of=./system.img bs=1000000 count=200 mkfs.ext3 ./system.img I'm attempting to do the same on android ...
4
votes
2answers
195 views

System files with strict permissions

Usually, when we run ls -l we can see such picture -rwx...- so the owner always has the full stack of permissions. And usually the owner of the system files is the root. Are there any system files ...
12
votes
2answers
11k views

How to create backup from symbolic links?

I have a directory with symbolic links to other directories. I want to archive the symbolic links, not as links but as archives containing the files of directories they refer to, using tar command. ...
0
votes
1answer
128 views

terminal logging doesn't complete when I close the terminal

This is the last line in my .bashrc (lines breaks inserted for readability): STARTTIME=`date +%F-%Hh-%Mm-%Ss-%N`; \ script -q -t 2> /home/USER/logs/$STARTTIME-timing.txt \ -c 'bash --rcfile ...
6
votes
4answers
11k views

Split a file by line and have control over resulting files extension

There is a standard command for file splitting - split. For example, if I want to split a words file in several chunks of 10000 lines, I can use: split -dl 10000 words wrd and it would generate ...
1
vote
1answer
468 views

Using tar on a file with an @ (at symbol)

I'm trying to extract a tarball using tar -xvf that's in the format (where * is any word character) *@*@*@*.tar.gz but I think tar is trying to find the file at a remote location. The error I get is ...
1
vote
4answers
659 views

Exporting environment variable

I am having some problem with bash. I want to export an environment variable whose value contains a variable but I don't want that variable (which is within the value) to be evaluated during the ...
2
votes
3answers
1k views

Sorting columns from two files with awk

I have two input files 28a39a289906c01159f999a68996091a tom@dong.com 274d1d2c7e931fb55ac0c91dd41f2be7 go@far.com 44d25d3b1b70b240d5058f1be1cef576 person@domain.com 2227a768f6d253b7bf81bb4ecb15b52d ...
9
votes
2answers
5k views

How to update kernel without reboot? (ksplice alternative)

How to update running kernel without reboot? I know about Oracle ksplice but it's not free and it supports only distributions that I don't use. Are there alternatives to ksplice?
3
votes
1answer
905 views

Can I set how long ssh-agent keeps keys in memory?

I'd like to have my keyfiles leave memory after a certain amount of disuse. Is there a way to make ssh-agent expire keys faster? It feels like it keeps them in memory and not needing a passphrase for ...
4
votes
2answers
1k views

Is there a way to remap the AltGr key to Ctrl with setxkbmap?

I've already checked the option section in /usr/share/X11/xkb/rules/base.lst but I didn't find an entry for AltGr...
5
votes
2answers
396 views

Testing ext3 filesystem on embedded device [closed]

My set up: An embedded device with flash memory on it. Flash is partitioned into ext3 filesystem partitions. Have busybox on it. My Goal: To uncover errors /bugs/ problems on ext3 filesystems. ...
3
votes
2answers
22k views

Auto running bash script on login

I wanted to make a script which ran automatically on login so I put it into the file ~/bash.profile, but it didnt run. When I put it in bashrc, it ran on opening a terminal. What I was doing in the ...
8
votes
1answer
2k views

Is the sum of all PIDs “utime” the total system utime?

In order to measure a user's total CPU time, I'm using the "utime" field out of /proc/[pid]/stat: utime %lu Amount of time that this process has been scheduled in user mode, measured in ...
2
votes
1answer
179 views

Permissions UMASK for New Directories

I have a directory "dir1" who's owner is "owner1" and it has 775 permissions. Another user in the same group as "owner1" is called "owner2" Whenever a file is written to "dir1" by "owner2" I need ...
2
votes
1answer
476 views

Fedora 16 dependency hell

There's a package libvpx-0.9.7 which is required by empathy application. Now I want to install another application which requires libvpx-1.0... Update is not allowed because some applications depend ...
1
vote
0answers
362 views

Debian: Upgraded to php 5.3 and lost phpcli, php-pear, etc

I upgraded to PHP5.3 using this tutorial: http://www.debiantutorials.com/how-to-install-upgrade-to-php-5-3-on-debian-lenny/ It removed the following packages: Removing php-pear ... Removing ...
6
votes
1answer
9k views

grep for words of no more than a certain length

I'm looking for a way to grep things like: i log for E M, i 1 f x i 0, I xi 1, 3 1,. simply based on number of characters. Nothing in that hypothetical output is longer than three characters. This ...
3
votes
2answers
2k views

Insert a multiline string into another string

I need to insert lines into an xml file : Insert <one> </one> into <tags> </tags> To obtain <tags> <one> </one> </tags> I tried this: ...
3
votes
1answer
138 views

What is the best way to restraint/secure a workstation?

I want to prevent users to copy on usb devices and some others actions. I was thinking of using polkit. Do you think it is a good solution or does someone know some alternatives ? EDIT: I also need ...
4
votes
3answers
5k views

How to get subshell's PID in Korn Shell (equivalent of $BASHPID)

In bash you have this handy variable: $BASHPID wich always returns the currently running subshell's PID. How can I get a subshell's PID in ksh? For example see the code below: #!/usr/bin/ksh93 echo ...
1
vote
1answer
265 views

Tools to dump entries from arbitrary sets of log files between 2 dates

I had a outage incident a few days ago and the support team has asked for any available logs for the period, while thinking about how to do this, it occurred to me that it would be generally handy to ...
13
votes
3answers
6k views

When do you need 'nohup' if you're already forking using '&'?

First this question is related but definitely not the same as this very nice question: Difference between nohup, disown and & I want to understand something: when I do '&', I'm forking ...
7
votes
2answers
25k views

Removing all spaces, tabs, newlines, etc from a variable?

This is the error I am getting and it's failing because of a variable whose value is supposed to be 2 (I am getting this using a select * from tabel). I am getting spaces in that variable. + 0 != ...
5
votes
1answer
424 views

GPG key pair generation: What do the plus and minus signs mean?

I just generated a new GPG key pair and gpg displays some random plus, minus, greater than, less than and circumflex signs. I was always wondering what they mean. Can you explain it to me? ...
3
votes
3answers
12k views

ls to show only directory/filename and size

First of all, this is not a duplicate of this: Linux ls to show only filename date and size Because I want to print actual directory name additionally. I was always using this command: ls -l | awk ...
4
votes
2answers
5k views

Why can't I copy my DVD with dd?

I tried dd, dd_rescue and ddrescue, all failed. I thought these tools bypass the filesystem and make a bitwise copy. dd is fooled, it finishes but just produces a small file and states it's finished. ...
1
vote
0answers
547 views

AIX multihomed multicast

On my AIX machine if I run netstat -ia I get: Name Mtu Network Address Ipkts Ierrs Opkts Oerrs Coll en0 1500 link#2 1e.18.1.1e.78.2 385229 0 1091655 0 0 ...
1
vote
2answers
5k views

Changing user in a script?

I am trying to change user in order to execute a specific command during startup. It fails silently and apparently the userchange isn't carried out as I can tell that the command isn't executed. What ...
0
votes
1answer
193 views

How to get the filename if particular regexp is present in the file in Perl

In a directory containing many files, if a particular regexp (or format) was found in file, I'd like to get that filename Example: If the word "rama" is found in file called ramayana, print the ...
4
votes
1answer
918 views

How can I search for and highlight multiple strings in VIM?

In VIM, how can I search for multiple strings and have a different color highlight for each match?
3
votes
1answer
1k views

How to bypass GNOME Terminal when sending keyboard input?

When running an interactive shell application, how can I send it a key (or key combination) which would normally be intercepted by GNOME Terminal? In this particular instance it's the F10 key which is ...
7
votes
1answer
4k views

How to launch an application with default “terminal emulator” on Ubuntu?

I wanted to execute some command in terminal emulator, like Konsole, but I need to make this cross-desktop. Is there some command like xdg-open, but for getting the default terminal emulator? I'm ...
1
vote
2answers
340 views

Variable name from command output

I have some string, and want to split on colon ":" assigning on variable with name from left part and value from right part. For example: echo "Title: Some title" | sed 's/:.*//' gives me wanted ...
8
votes
1answer
3k views

Linux: LUKS and multiple hard drives

I have a Debian Linux system (amd64) installed on a RAID-1 system encrypted device (LVM on LUKS) and will have a RAID-6 of >=4 disks where I'll put my data (LUKS and maybe LVM). I think the basic ...
3
votes
3answers
221 views

How to perform an action only on the first line?

sed 's/.\(.*\)/\1/' myfile Say myfile contains: abc def ghi I want to remove the first character only from the first line but the above removes it from all the line.
4
votes
2answers
2k views

gnome 3 hibernate option

I switched to gnome 3 (which I like) and of all the things that have changed the only one that bothers me is the fact that there is not a hibernate option. Now, I know of the pm-hibernate command but ...
6
votes
1answer
416 views

Where to find the source file of function pause(void) and sigsuspend(set)

I want to find the source file of pause and sigsuspend in the glibc-2.14.1 package. I grep the package and find the file sysdeps/posix/pause.c has a definition of function pause, the code is int ...
4
votes
1answer
3k views

Mathematical connection between SZ RSS and VSZ in ps o/p?

I wanted to know what mathematical connection is there between the SZ, RSZ and VSZ output in ps output e.g. ps -p 2363 -o sz,rss,vsz
7
votes
1answer
678 views

Debian: How to delay configuration when installing/upgrading?

One of my Debian systems is rarely upgraded. So when it is time to upgrade, there are loads of packages. Right now I basically have to monitor the upgrade, because every 50 packages or so there is a ...
6
votes
2answers
1k views

How to mass change password attributes in AIX uname -rv=3 5 for all users but root

I want to do a mass change on all users but root in AIX for the following "password attributes": Weeks before password reuse: 15 Password min length: 6 Can it be done, or do I need to do them one ...
6
votes
5answers
842 views

Terminal and Vim

I open a terminal then I open Vim. Then I work on my source code, but unfortunately I click on the close button of the terminal title bar and my work is lost. Is it possible to configure Vim such that ...
2
votes
2answers
2k views

What does this python2 error mean, and what should I do about it?

Whenever I attempt to use an application relating to python2(gnome-tweak-tool, bzr, etc.) it fails to start and, when run from command-line, I get this error: [username@host ~]$ gnome-tweak-tool ...
3
votes
5answers
7k views

NFS keeps randomly crashing, breaks mount on other clients

I interconnect several of my Linux servers with NFS. For a while its been going fine but for some reason keeps getting more and more unstable Example: Copy a 4 GB file from client to NFS server, ...
8
votes
1answer
4k views

How can I observe memory bandwidth?

I have an embedded Linux ARM system that is showing significantly less throughput than expected on both Ethernet and USB. I suspect the memory may be contributing. Is there a way to observe the memory ...
0
votes
1answer
705 views

FreeBSD 9.0 with GNOME 3

Is this possible , to install GNOME 3 on FreeBSD , at the moment ? I did not find a clear answer about this.
1
vote
1answer
202 views

Making the transition to multiple hard drives with dual boot

Hi I'm looking for tip or things to watch out for, while I make the following changes to my system: I currently have a dual boot setup on one hard drive (win7 and ubuntu), I am going to change to a ...
4
votes
2answers
408 views

Is there a tool to map ecryptfs plaintext and encrypted filenames?

Ecryptfs encrypts filenames and sometimes I need to find particular file, so I would like a tool to map the encrypted filenames back to their plaintext file name.
1
vote
0answers
843 views

Hanging at “Running Transaction Test” when trying to install php-soap

I have here a CentOS 5 and I'm trying to run yum install php-soap but the installer hangs on and the last step is Running Transaction Test. I found out that NFS shares are the problem. See here or ...

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