A file system structure in which to store computer files.

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3
votes
2answers
213 views

Command for creating a directory and navigating into it directly? [duplicate]

Quite often I need to perform this two commands: mkdir abc cd abc I am curious whether there is a simple command (or an alias that I can create and use) to do it in one go, like user@GROUP:~$ mdcd ...
3
votes
1answer
325 views

How does the Linux file structure work?

I see the different folders bin, dev, mnt, proc, srv, sys, etc. What are the properties of all these different folders? What are there purposes? Are there files in some of them that I should not ...
3
votes
1answer
2k views

creating abbreviations for commonly used paths

I am new to linux and was wondering whether it is possible to create abbreviations that can be used in terminal. I know about alias command, but am not sure whether that can be used for what I am ...
3
votes
2answers
396 views

Permissions of webserver's root directory

I've had this issue on several setups, and I'm unsure of how to handle it. At first, all of /var is owned by root:root. Clearly I don't want the web directory to be owned by root, so I do chown ...
2
votes
4answers
1k views

Find directories that do not contain subdirectories

I'm writing script is ksh. Need to find all directory names directly under the current directory which contain only files, not subdirectories. I know that I could use ls -alR and recursively parse ...
4
votes
1answer
682 views

how to make gnome use my home folder as Desktop folder?

Environment: Debian 7, gnome-shell. I dislike having a Desktop folder and a Home folder. I like all the applications to use my home folder. Specifically I am concerned about nautilus and ...
3
votes
2answers
322 views

Refer to an item in `dirs`

I use pushd to work with multiple directories in bash and zsh. I've aliased dirs to dirs -v so that I get an ordered list when I want to see what's on the directory stack: chb$ dirs 0 ...
3
votes
1answer
1k views

Can't rename a directory that I own

I have a directory with a big load of sub directories. I own all of them, and the permissions are all 777. pascal@azazel /box $ ls -al total 147872 drwxr-xr-x 293 root root 12288 aoĆ» 22 19:44 ...
2
votes
3answers
5k views

cp --no-target-directory explained

Question: I need a simple example of how to use cp --no-target-directory. I do experience some difficulties in understanding cp --no-target-directory. I do understand the explanation for mv ...
2
votes
5answers
7k views

Get the newest file from directory structure year/month/date/time

I store backups of databases in a directory structure year/month/day/time/backup_name an example would be basics_mini/2012/11/05/012232/RATIONAL.0.db2inst1.NODE0000.20110505004037.001 ...
1
vote
2answers
3k views

Create and move to a directory in one command - unix [duplicate]

Possible Duplicate: Is there a one-liner that allows me to create a directory and move into it at the same time? I know this is a very basic question but I can't seem to figure out what to ...
0
votes
1answer
120 views

How can number of subdirectories and files be determined from ls -ld command? [closed]

How can number of subdirectories and files be determined from the output of using ls -ld command? I realize that this command only lists the directories.
41
votes
9answers
39k views

How do I get the MD5 sum of a directory's contents as one sum?

The md5sum program does not provide checksums for directories. I want to get a single MD5 checksum for the entire contents of a directory, including files in sub-directories. That is, one combined ...
35
votes
8answers
59k views

How do I loop through only directories in bash?

I have a folder with some directories and some files (some are hidden, beginning with dot). for d in *; do echo $d done will loop through all files, but I want to loop only through directories. ...
39
votes
5answers
15k views

How can I create a /dev/null-like “blackhole” directory?

I would like to create a "/dev/null" directory (or a "blackhole" directory) such that any files written to it are not really written, but just disappear. I have an application that writes out large ...
46
votes
4answers
41k views

How can I calculate the size of a directory?

How to know the size of a directory? Including subdirectories and files.
25
votes
5answers
16k views

Converting relative path to absolute path

Is there a *nix command to get absolute(and canonicalized) path from relative path(with current path) or symbolic link?
32
votes
8answers
10k views

How to delete this undeletable directory?

I untarred a corrupt tar file, and managed to end up with some directory that I can not delete, If I try to delete it, it seems like it can not be found, but ls shows it's present, both with bash and ...
18
votes
3answers
6k views

Flattening a nested directory

This is probably very simple, but I can't figure it out. I have a directory structure like this (dir2 is inside dir1): /dir1 /dir2 | --- file1 | --- file2 What is ...
24
votes
7answers
19k views

Merging folders with mv?

If I move a folder with mv called "folder" to a directory that already contains "folder" will they merge or will it be replaced?
24
votes
3answers
90k views

“Input/output error” when accessing a directory

I want to list and remove the content of a directory on a removable hard drive. But I have experienced "Input/output error": $ rm pic -R rm: cannot remove `pic/60.jpg': Input/output error rm: cannot ...
22
votes
4answers
1k views

Is there any way attacker could use mkdir to compromise a system?

I'm setting up a restricted user account for user ricardo, a troublesome user on my system. I want to grant him the right to make directories using sudo, which he sometimes needs to do. I'm ...
15
votes
5answers
20k views

Find the total size of certain files within a directory branch

Assume there's an image storage directory, say, ./photos/john_doe, within which there are multiple subdirectories, where many certain files reside (say, *.jpg). How can I calculate a summary size of ...
11
votes
4answers
7k views

symbolic link to a directory and relative path

I've created symlink with absolute path to the directory (Blink) and have for example following tree: $ ls -l /tmp/A total 0 lrwxrwxrwx 1 root root 6 Apr 3 12:27 Blink -> /tmp/B -rw-r--r-- 1 root ...
17
votes
6answers
2k views

Why do I have to cd out of a deleted directory?

On my server I have a directory structure looking something like this: /myproject/code I normally have an ssh connection to the server and 'stand' in that directory: root@machine:/myproject/code# ...
8
votes
2answers
13k views

rsync compare directories?

Is it possible to compare two directories with rsync and only print the differences? There's a dry-run option, but when I increase verbosity to a certain level, every file compared is shown. ls -alR ...
6
votes
5answers
1k views

Making a directory protected from 'rm -rf'

I just lost some data in folder A which was inside folder B after doing rm -rf B. Before I could realize what have I done, it was all over. Now a lesson is learnt, I wish to make some of my folder ...
14
votes
4answers
2k 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?
9
votes
5answers
4k views

pv for directory copy

I need to copy a very large directory (talking in terabytes here) and want to monitor the progress. I found that pv is a nice utility, but how can I use it for copying directories recursively? (pv ...
9
votes
5answers
11k views

Creating numerous directories using mkdir

I would like to create many directories using mkdir. Each directory name will consist of a prefix (a string) and an index (an integer). Suppose that I would like the prefix to be "s" and the indices ...
8
votes
3answers
31k 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 ...
7
votes
1answer
368 views

Expand ~, . and `..`

Since ~, . and .. are special directories, why are they handled differently in the following example? $ echo ~ /home/tim $ echo .. .. $ echo . . ~ is expanded into the dir, but the other two are ...
4
votes
2answers
537 views

Shell script printing the most visited directories

Is there a way to write a bash script with the following functionalities? Be launched when I press some key or key combination. (not so important requirement) Identify the 7 most visited directories ...
14
votes
5answers
1k views

How is a directory a “special type of file”?

I am reading this Unix tutorial and came across this quote... We should note here that a directory is merely a special type of file. ...but no explanation or details are provided. How is a ...
8
votes
1answer
1k views

Why could the size of the “dot” file “.” exceed 4096?

Today I found an "empty" directory with a size of 4MB. It had no visible contents, so I tried ls -lah. This showed me some hidden files (not very large). Searching for the reason why the directory ...
8
votes
2answers
936 views

the slash (/) after a directory name on shell commands

I have a little question here. If I have two files, say filea and fileb, mv filea fileb would delete fileb rename filea to fileb Then if I have two directories, say dira and dirb, mv dira dirb ...
6
votes
3answers
1k views

Read a directory to see the file to inode mapping

I'm just learning about filesystems and it is said that a directory is just an ordinary file which keeps a list of file-inode pairs. If I try to open the directory Downloads with any of the following ...
5
votes
2answers
2k views

Trailing slashes on symbolic links to directories

I'm trying to emulate the process of path resolution (see man page path_resolution) in unix-like systems. My OS is Linux with GNU coreutils 8.7. In order to clarify the meaning of extra trailing '/' ...
5
votes
3answers
2k views

On deep-created directories

In Windows, there is a certain limit on the number of characters in a path, which restricts how deep a directory can be created. I was wondering what the case is like in Linux? Do you have some ...
4
votes
3answers
1k views

Infinitely Nested Directories

Let me start off by saying this is a Mac Terminal I'm using. Not Linux, but I assumed I would get the best answers here as it has to do with Unix and the command line not really anything about Mac ...
3
votes
2answers
2k views

Path syntax rules

I'm writing a library for manipulation Unix path strings. That being the case, I need to understand a few obscure corners of the syntax that most people wouldn't worry about. For example, as best as ...
3
votes
3answers
995 views

How to create a short path?

We have so many useful folders, which are in different path, for our working in Linux. For example : $ cd ~/Documents/Courses/EDX/physics2013/ $ cd ~/Documents/Company/OpenGL/Proj/... $ cd ...
3
votes
5answers
6k views

Find and copy directories containing file type

I have a directory "Movies" containing subdirectories "Movie Name". Each subdirectory "Movie Name" contains a movie file and related image/nfo files etc. I'm trying to copy all directories containing ...
3
votes
6answers
992 views

Make directory copies using find

I have a directory with a bunch of subdirectories in it. Thus /usr/local/src/ccl/ccl-1.8/x86-headers$ ls elf gl gmp gnome2 gtk2 jni libc Each of these directories has a further subdirectory C ...
3
votes
3answers
220 views

Permissions for a submission script

I'm a TA for an introductory Python programming class (all work is done from the terminal), and I'm writing a project submission script. Ideally I want a directory setup like this: submissions/ ...
2
votes
1answer
342 views

How to count occurrences of all the words in all the files of a directory using grep? But with count incremented only once per word per file

I have already asked a similar question but people misunderstood what i was asking. I was asking how to generate a list of every word with a word count incremented only once per word per file. For ...
2
votes
2answers
1k views

Can one copy a relpath in one command?

I find myself doing this often enough that I wonder if there's a standard Unix way to do it: % mkdir -p /TARGETDIR/relative/path/to % cp ./relative/path/to/somefile /TARGETDIR/relative/path/to In ...
9
votes
4answers
762 views

How do you check if a file exists within awk? [-d 'filename'] failing

I'm trying to generate a list of users who have a home directory set which does not exist. It seems I should be able to do this with awk, but something is wrong with my syntax. It keeps telling me ...
6
votes
2answers
175 views

Filtering redundant paths from a list of paths

I have a list of relative paths such as this: dir1 dir2 dir2/dir3 dir2/file1 dir3/file2 dir3/dir4 dir3/dir4/file3 In the example above, the specifier dir2/file1 (for example) is redundant, because ...
5
votes
1answer
4k views

mv file without write permission to the source file

I just realised that I can move a file that I do not own and don't have write permissions on. I have write permissions to the directory, so I am guessing that is why I could move it, but in this ...