Tagged Questions

6
votes
1answer
1k views

dd: writing '/dev/null': No space left on device

I am reading a 550MB file into /dev/null and I am getting dd: writing '/dev/null': No space left on device I was surprised. I thought /dev/null is a black hole where you can send as much as you ...
2
votes
3answers
2k views

How can I delete all files with a particular extension in a particular folder?

If I set the current/working directory (navigating to it using cd) to some particular directory and then type: rm *.xvg What will this command do? Is it true that the above command will only delete ...
9
votes
4answers
613 views

Best method to collect a random sample from a collection of files

Suppose there is a directory holding 300 data files. I want to randomly select 200 of those files and move them into another directory. Is there a way to do that under Unix/Linux?
2
votes
1answer
634 views

skype not found on Oneiric 64, but it is right there [duplicate]

Possible Duplicate: Can't execute some binaries in chroot environment (zsh: Not found) I have something weird here. Cannot find a file although it is right there. $ skype command not ...
11
votes
5answers
6k views

Script to monitor folder for new files?

How do I detect new files in a folder with a bash script? I would like to process the files as soon as they are created in the folder. Is this possible to do so or do I have to schedule a script with ...
1
vote
0answers
89 views

“cd //” and “cd /” what is the difference? [duplicate]

Possible Duplicate: unix, difference between path starting with '/' and '//' If I make a cd // followed by a pwd I see: # cd // # pwd // why is that? what's the differece ...
26
votes
2answers
834 views

Why is '.' a hard link in Unix?

I've seen many explanations for why the link count for an empty directory in Unix based OSes is 2 instead of 1. They all say that it's because of the '.' directory, which every directory has pointing ...
5
votes
2answers
907 views

/dev/sda2 has gone 49710 days without being checked, check forced

Why the shell show "/dev/sda2 has gone 49710 days without being checked, check forced." at centos start and then reboot? ...... /dev/sda2: Superblock last mount time is in the future. FIXED. ...
1
vote
3answers
295 views

Fast incremental searching of files from shell

I like the command-t script in vim editor that is able to intelligently and incrementally search for files. Is there some similar program that is able to search from shell? It would be great if it ...
9
votes
2answers
556 views

How to manage huge amount of files in shell?

$ ls ./dir_with_huge_amount_of_files/errors/ Suppose a dir is full of pictures with unix timestamps, I mean a lot measured in many GBs or even more. Shell-commands like ls will get ...
1
vote
1answer
277 views

error using “du” command

I am on the university machine trying to estimate the disk usage I have on my space I do du -csh ./ from the begining of my account, but an error is given that ./Yesterday/Yesterday is not a ...