File name is a name used to identify a file uniquely on given file system.

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54
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6answers
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How does Linux handle multiple consecutive path separators (/home////username///file)?

I'm working on a python script that passes file locations to an scp subprocess. That's all fine, but I'm in a situation where I may end up concatenating a path with a filename such that there's a ...
46
votes
9answers
62k views

Looping through files with spaces in the names?

I wrote the following script to diff the outputs of two directores with all the same files in them as such: #!/bin/bash for file in `find . -name "*.csv"` do echo "file = $file"; diff ...
40
votes
2answers
2k views

Why do some Linux files have a 'd' suffix?

I am new to Linux. I observed some of the binary files and configuration file name s end with a d. What is reason for putting a d at the end of the file name? Like httpd, ospfd, pppd, syslogd, ...
35
votes
0answers
954 views

Completing avfs fake directories in zsh

How can I tweak zsh's completion system to complete “fake” files in some circumstances? More precisely, the AVFS filesystem exposes archives as directories by creating a “fake directory” next to ...
34
votes
4answers
4k views

unix, difference between path starting with '/' and '//'

In unix/linux, any number of consecutive forwardslashes in a path is generally equivalent to a single forwardslash. eg. $ cd /home/shum $ pwd /home/shum $ cd /home//shum $ pwd /home/shum $ cd ...
32
votes
1answer
4k views

Why can Linux show a file name containing character '/'?

The following picture is snapped in a real Linux environment. Why can Linux show a file name containing character '/'?
29
votes
10answers
11k views

Unix file naming convention

I was wondering what is the naming convention for files in Unix? I am not sure about this, but I think there is perhaps a universal naming convention that one should follow? For example, I want to ...
29
votes
2answers
8k views

What does dash “-” at the end of a command mean?

Given the following command: gzip -dc /cdrom/cdrom0/file.tar.gz | tar xvf – What does the - at the end of the command mean? Is it some kind of placeholder?
28
votes
2answers
809 views

find(1): how is the star wildcard implemented for it to fail on some filenames?

In a file system where filenames are in UTF-8, I have a file with a faulty name; it is displayed as: D�sinstaller, actual name according to zsh: D$'\351'sinstaller, Latin1 for Désinstaller, itself a ...
26
votes
8answers
2k views

Dealing with file names with special first characters (ex. ♫)

I have recently come across a file whose name begins with the character '♫'. I wanted to copy this file, feed it into ffmpeg, and reference it in various other ways in the terminal. I usually ...
24
votes
12answers
7k views

How can I delete a file with no name

I somehow managed to create a file that doesn't seem to have a filename. I found some information regarding how to get more details of the file in the following thread. However, I tried some of the ...
24
votes
5answers
15k 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?
22
votes
3answers
3k views

How to rename file to .. (dot dot)?

Apparently you can rename file to .... If I were insane, how would I rename file to .. or .? Is such a filename even allowed? Backslash doesn't seem to disable dot's special meaning: $ mv test \. ...
22
votes
3answers
775 views

shellcheck is advising not to use basename: why?

I am trying out shellcheck. I have something like that basename "${OPENSSL}" and I get the following suggestion Use parameter expansion instead, such as ${var##*/}. From the practical point of ...
22
votes
3answers
14k views

What charset encoding is used for filenames and paths on Linux?

Does it depend on what file system I use? For example, ext2/ext3/ext4 but also what happens when I insert one of those "joliet" CD-ROMs with ISO 9660? I've heard that POSIX contains some sort of spec ...
19
votes
8answers
17k views

List files sorted numerically

I have a bunch of files from log1 to log164. I'm trying to LIST the directory (sorted) in a UNIX terminal but the sort functions are only providing the format like this: home:logs Home$ ls -1 | sort ...
19
votes
2answers
2k views

Tilde (~) inside working unix directory

So, Im working in a UNIX environment and I noticed that inside my working directory, which is miles miles away from my UNIX home, there is a ~. Now, once in the past, I did rm -rf ~ from my working ...
17
votes
5answers
27k views

File extensions for unix shell scripts

On wikipedia, the article for .sh says: For the .sh file extension type, see Bourne shell. How about other unix shells? I know that the shebang is used inside the file to indicate an ...
17
votes
3answers
6k views

When should I use a trailing slash on a directory? [duplicate]

Possible Duplicate: How linux handles multiple path separators (/home////username///file) Most commands I use in linux behave exactly the same whether I include the trailing slash / ...
17
votes
6answers
18k views

Grabbing the extension in a file name

How do I get the file extension from bash? Here's what I tried: filename=`basename $filepath` fileext=${filename##*.} By doing that I can get extension of bz2 from the path /dir/subdir/file.bz2, ...
17
votes
3answers
7k views

bulk rename (or correctly display) files with special characters

I have a bunch of directories and subdirectories that contain files with special characters, like this file: robbie@phil:~$ ls test�sktest.txt test?sktest.txt Find reveals an escape sequence: ...
15
votes
3answers
1k views

Newlines in filenames

I understand and accept the premise that defensive1 shell scripting is both prudent and, in the longer term, more sustainable. Many of the answers to text processing questions here follow this ...
15
votes
3answers
4k views

Understanding Unix file name encoding

I have a hard time understanding how the file name encoding works. On unix.SE I find contradicting explanations. File names are stored as characters To quote another answer: Several questions about ...
14
votes
7answers
13k views

Bulk rename, change prefix

How can I bulk replace the prefix for many files? I have a lot of files like TestSRConnectionContext.h TestSRConnectionContext.m I would like to change all them to CLConnectionContext.h ...
14
votes
6answers
3k views

Portable way to get script's absolute path?

What is a portable way for a (zsh) script to determine its absolute path? On Linux I use something like mypath=$(readlink -f $0) ...but this is not portable. (E.g., readlink on darwin does not ...
14
votes
2answers
364 views

Security implications of running perl -ne '…' *

Apparently, running: perl -n -e 'some perl code' * Or find . ... -exec perl -n -e '...' {} + (same with -p instead of -n) Or perl -e 'some code using <>' * often found in one-liners ...
13
votes
4answers
1k views

Is it correct to use certain special characters when naming filenames in Linux?

Is it correct to use certain special characters, as +, &, ', . (dot) and , (comma), basically, in filenames. I understand that you can use - and _ with no problem, but doing some research I have ...
12
votes
2answers
3k views

What is the difference between “du -sh *” and “du -sh ./*”?

The title says it all. What's the difference between those 2 commands? NOTE: I'm more interested in the * and ./* part.
12
votes
4answers
11k views

Is space not allowed in a filename?

It is said that on Unix and Linux in general, you should avoid having spaces in a filename of a file (ordinary file, dir, link, device file, ...). But I do that all the time. For a filename with a ...
12
votes
7answers
48k views

How to list files without directories, and filter by name (ls options)

I have a directory called uploads. It contains a bunch of files, plus a few subdirectories which in turn contain files. Is there a way I can (in one step) do the following: List ONLY the files in ...
12
votes
4answers
8k views

What is the maximum allowed filename (and folder) size with eCryptfs?

I am a new eCryptfs user and I have a very basic question that I wasn't able to find anywhere. I am interested in using eCryptfs via my Synology NAS that uses Linux. While trying to encrypt my folder ...
12
votes
2answers
905 views

Shell filename pattern that expands to dot files but not to `..`?

Recently I had a little mishap caused by a shell pattern that expanded in an unexpected way. I wanted to change the owner of a bunch of dot files in the /root directory, so I did chown -R root .* ...
11
votes
7answers
2k views

Shortest way to extract last 3 characters of base (minus suffix) filename

I'm trying to set a variable in an sh script to the last 3 characters of the base name of a file (by base name I mean without the path and without the suffix). I've succeeded in doing this but, purely ...
11
votes
6answers
998 views

Is there a terminal app that allows filenames to be clickable?

Is there a terminal emulator (extension or app) that does link resolution for local paths? In particular when I see things like: ...
10
votes
5answers
933 views

How to get the last N files in a directory?

I have many files that are ordered by file name in a directory. I wish to copy the final N (say, N=4) files to my home directory. How should I do it? cp ./<the final 4 files> ~/
10
votes
1answer
2k views

What does *~ mean?

At the end of a makefile I saw rm -f *~ *.class I understand the *.class, but what's *~?
9
votes
2answers
4k views

Why can't I have a folder and a file with the same name?

I've never had this problem before, but for some reason, I can't rename my folder to packages/. This is the structure: root - packages_old/ - packages When I try to rename the folder with ...
9
votes
3answers
3k views

identify files with non-ASCII or non-printable characters in file name

In a directory size 80GB with approx 700,000 files, there are some file names with non-English characters in the file name. Other than trawling through the file list laboriously is there: An easy ...
9
votes
2answers
2k views

why inode value changes when we edit in “vi” editor?

When I edit a file in "vi" editor the inode value of the file is changing. But when edited with cat command the inode value is not changing.
9
votes
3answers
719 views

Select unicode filename in Bash

Ok; suppose I'm in Bash and I have several files in a folder. Several of them are named file☠☡☢☣.txt, where ☠☡☢☣ starts with crazy untypable unicode characters. How would I refer to one of them? ...
9
votes
1answer
320 views

How do case-insensitive filesystems display both upper and lower case file names?

This question occurred to me the other day when I was working on a development project that relies on an opinionated framework with regard to file names. The framework (irrelevant here) wanted to see ...
9
votes
2answers
3k views

Several questions about file-system character encoding on linux

Due to a lot of file exchange works between Windows (GBK encoding) and Linux (UTF-8 encoding), it will encounter character encoding issues easily, such as: zip/tar files whose name contains chinese ...
8
votes
3answers
471 views

Why do tar and gzip files usually have a file extension?

File extensions are not necessary on unices, still every tarred, gzipped or bzipped file I encounter has a file extension like .tar, .tar.gz or .tgz. Is there any special reason for that or is that ...
8
votes
6answers
507 views

When does the empty string denote the current directory?

In a script I use find to collect some files in the current directory, as in $ find . -name "*.h" ./foo.h Now I'd like it to just output foo.h, without the ./ prefix. I thought that the empty ...
8
votes
3answers
598 views

What are ./ and ../ directories?

Simple question, but I'm not sure where to look and google doesn't respond to periods and slashes. I'm just trying to count the # of files & directories in the current directory (not including ...
8
votes
3answers
7k views

adding text to filename before extension

I would like to add text to the end of filename but before the extension. Right now I am trying, for f in *.shp; do echo $f_poly; done the output is, Quercus_acutifolia.shp_poly ...
8
votes
3answers
4k views

File and directory naming conventions

I want to refactor the files and directories on my system. However I am not sure what is best practice. After reading this question and it's answers I assume the most important part is to be ...
8
votes
2answers
4k views

How can you move (or copy) all files to a directory with the same filename prefix?

Using Bash So let's say I have a bunch of files randomly placed in a parent directory ~/src, I want to grab all the files matching a certain suffix and move (or copy) them to a ~/dist directory. ...
8
votes
1answer
3k views

For filenames, are underscores or dashes more common in Unix file names?

When you are naming files with multiple words in the name, is it more common in Unix systems to use underscores, camel case, or dashes to separate the words?
8
votes
1answer
396 views

Can I truncate long file names in ls listing

I have a number of files with very long names. Please, is there a way to use ls -C and truncate the file names to get more columns for an overall view? Or is there a better way to get a compact ...