Questions that deal with various representations of characters & character sets, such as: ASCII, UTF-8, EBCDIC, among others. Often encountered when moving files between operating systems that encode new lines with carriage returns and/or newline characters.

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39
votes
2answers
33k views

How can I set VIM's default encoding to UTF-8?

I'd like to contribute to an open source project providing translated strings. One of their requirements is that contributors must use UTF-8 as the encoding for the PO files. I'm using VIM 7.3 on ...
34
votes
5answers
26k views

Filtering invalid utf8

I have a text file in an unknown or mixed encoding. I want to see the lines that contain a byte sequence that is not valid UTF-8 (by piping the text file into some program). Equivalently, I want to ...
29
votes
3answers
21k 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 ...
28
votes
2answers
994 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 ...
21
votes
5answers
3k views

Generating a random password; why isn't this portable?

I want to generate a random password, and am doing it like so: </dev/urandom tr -dc [:print:] | head -c 64 On my laptop, which runs Ubuntu, this produces only printable characters, as intended. ...
21
votes
3answers
6k 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 ...
18
votes
2answers
37k views

How can I test the encoding of a text file… Is it valid, and what is it?

I have several .htm files which open in Gedit without any warning/error, but when I open these same file in Jedit, it warns me of invalid UTF-8 encoding... The html meta tag states "charset=ISO-...
17
votes
4answers
10k 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: ...
16
votes
2answers
21k views

What is the ^M character called?

TexPad is creating it. I know that it is under some deadkey. I just cannot remember it is name. The blue character: I just want to mass remove them from my document. How can you type it?
16
votes
3answers
22k views

How to specify characters using hexadecimal codes in `grep`?

I am using following command to grep character set range for hexadecimal code 0900 (instead of अ) to 097F (instead of व). How I can use hexadecimal code in place of अ and व? bzcat archive.bz2 | grep -...
13
votes
3answers
642 views

How to convert an emoticon specified by a U+xxxxx code to utf-8?

Emoticons seem to be specified using a format of U+xxxxx wherein each x is a hexadecimal digit. For example, U+1F615 is the official Unicode Consortium code for the "confused face" 😕 As I am ...
13
votes
2answers
7k views

Convert a .docx to a .pdf with pandoc

I am trying to convert a .docx received by mail to a correct pdf by using pandoc (I am using GNU/Linux). I have an error concerning characters encoding : $ pandoc file.docx -o file.pdf pandoc: ...
13
votes
1answer
834 views

Command to retrieve the list of characters in a given character class in the current locale

What could be way to retrieve a list of all the characters in a given character class (like blank, alpha, digit...) in the current locale. For instance, LC_ALL=en_GB.UTF-8 that-command blank ...
12
votes
4answers
17k views

Why do some characters show as squares in Chrome?

For example in the dev tools I get something like: Some of these squares are at the end of lines, initially I thought they were carriage returns but it turns out they aren't. Also, squares appear ...
12
votes
1answer
15k views

Foreign characters won't display in SSH

I'm having some problems with using ssh and a remote server (which I do not have admin access to) - Specifically, there are a couple of folders on there with Korean and Cyrillic text. When I display ...
11
votes
3answers
8k 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 ...
11
votes
2answers
21k views

ssh and character encoding

When I ssh into my VPS, I have irssi running in screen. When someone sends a unicode character (such as © or €), irssi displays garbage when I use it via the screen in a ssh session. If I connect to ...
11
votes
4answers
2k views

support for utf-8 encoding with lpr

While trying to send a text file to the printer via lpr from xterm, the content was corrupted beyond recognition, the cause of which was ultimately traced to the encoding of the file. If I instead ...
10
votes
2answers
428 views

Which character encodings are supported by posix?

POSIX defines the behavior of tools such as grep, awk, sed, etc which work against text files. Since it is a text file, I think there is the problem(s) of character encoding. Question: What is the ...
10
votes
3answers
17k views

Characters encodings supported by more, cat and less

I have a text file encoded as following according to file: ISO-8859 text, with CRLF line terminators This file contains French's text with accents. My shell is able to display accent and emacs ...
10
votes
2answers
12k views

Printing decimal to ascii character, my command does not output as intended

I wanted to output a string of all the ascii characters with the following command for i in `seq 32 127`; do printf "%c" $i; done The output of the above command is: ...
10
votes
2answers
4k 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 ...
9
votes
2answers
2k views

Why are wc -m and wc -c different?

As a C programmer, I was surprised to see that wc -c (which count the number of bytes), and wc -m (which counts the number of characters) output very different results for a long, text file of mine. I ...
9
votes
2answers
9k views

tr complains of “Illegal byte sequence”

I'm brand new to UNIX and I am using Kirk McElhearn's "The Mac OS X Command Line" to teach myself some commands. I am attempting to use tr and grep so that I can search for text strings in a regular ...
8
votes
1answer
5k views

How can I change locale/encoding to avoid getting weird characters in terminal?

I have installed tree on my ubuntu box, when i connect to it from Putty and I launch tree i get this : $ tree âââ html.vim -> xml.vim âââ js.vim -> xml.vim âââ xml.vim instead of this : $ ...
8
votes
3answers
8k views

Effect of $LANG on terminal

I'm trying to learn how the $LANG variable behaves with gnome-terminal (and its character encoding preference option). I've been using iso8859-1 (latin1) as my main character-set and all my filenames ...
8
votes
3answers
10k views

How to fix Russian letters in a Wine application when adjusting LANG does not help?

An application with a Russian UI shows question marks instead the most of its text (some elements are rendered ok though). The system locale is English (en_US, en_IE), I've tried Ubuntu ant XUbuntu ...
8
votes
1answer
7k views

How to fix character encoding in bash (arch linux)

I have some issues with the encoding of german umlauts in bash. It mostly is working fine, but when i am typing a invalid command, the error message generated by bash contains strange escape sequences ...
7
votes
4answers
14k views

How to print all printable ASCII chars in CLI?

How can I list all the printable ASCII characters in the terminal?
7
votes
2answers
657 views

Does OS X have its own line format?

Obviously there are at least two newline types: DOS and Unix. But does OS X have its own plaintext 'format'? I opened a text file in nano and was surprised to see: [ Read 26793 lines (Converted from ...
7
votes
1answer
2k views

`^M` at the end of each line of text files generated under Windows

I was wondering why if you open a textfile made in Windows notepad under unix you will find that it has ^M where there should be a new line? My understanding is that in Windows, every line is ended ...
7
votes
2answers
7k views

Set Gnome terminal's default charset to utf8

Currently, I opened my gnome terminal and the default charset is gb2312. How can set the default charset to utf8 in Gnome terminal? I checked the preference setting but seemed not to find it. ...
7
votes
2answers
4k views

terminal: displaying special characters

In some programs, such as htop the lines and frames are not displayed correctly. Instead, they are displayed as - and /. But on another machine, they are displayed correctly as proper lines: I ...
7
votes
2answers
4k views

working with filenames in a different encoding over ssh

I'm ssh'ing to a remote system where a different encoding for the filenames (and for the users' locales) has been used. And this causes some problems. Problems solved by matching the locale settings ...
6
votes
4answers
16k views

echo bytes to a file

I'm trying to connect my rasberry Pi to some display using the i2c bus. To get started I wanted to manually write stuff, bytes in particular to a file. How do you write specific bytes to a file? I ...
6
votes
3answers
1k views

How to replace all percent-encoded UTF-8 substrings with plain UTF-8 text?

I've got a html file with a lot of %-encoded UTF-8 text in URLs. For example "%D1%80%D0%B5%D1%81%D1%83%D1%80%D1%81%D1%8B" stands for "ресурсы" ("resources" in Russian). The task is to replace all ...
6
votes
3answers
1k views

Convert an ASCII file with octal escapes for UTF-8 codes to UTF-8

I have a text file which is an ASCII file itself, but contains octal escape sequences representing codes in utf-8: \350\207\252\345\212\250\346\216 Is there some program or command that can convert ...
6
votes
3answers
19k views

How to change encoding from Non-ISO extended-ASCII text, with CRLF line terminators to UTF-8?

I have a txt file : $ file -i x.txt x.txt: text/plain; charset=unknown-8bit $ file x.txt x.txt: Non-ISO extended-ASCII text, with CRLF line terminators And there are some characters that are ...
6
votes
2answers
162 views

What is the connection between a gedit bug and a Unix-&-Linux Q/A href?

While answering a Unix-&-Linux question, I observed that Gedit and two other editors, Leafpad and Medit (I tested 12 editors altogether) exhibit the a certain bug. As it turns out, the bug is ...
6
votes
4answers
6k views

How to convert to HTML code?

Are there any scripts that can convert between text (e.g. <hi>) and the html entities version (&lt;hi&gt;) like this website does? Or at least a PHP file?
6
votes
2answers
3k views

Can vim display ASCII characters only, and treat other bytes as binary data?

I already know vim -b, however, depending on the locale used, it displays multi-byte characters (like UTF-8) as single letters. How can I ask vim to only display ASCII printable characters, and ...
6
votes
2answers
8k views

terminal: non-english characters

I used to be able to copy&paste (or type if I load respective keyboard layout) any kind of characters (eg. é ö ñ ß و 好) in my console/terminal. Now I bought a new computer and it does not work ...
6
votes
1answer
68 views

How can I make `file` output line break type and encoding for all file types?

I often find myself in the need to check the encoding and the line break type of a file. The file utility seems to be a perfect fit. Unfortunately it doesn't output the desired information for all ...
6
votes
2answers
8k views

special character in filename (\#033OA)

I've got a slight problem with a very stubborn error during an rsync. It's caused by a file with a special character in its filename. There's been others but I could sort that out by doing some ...
6
votes
2answers
2k views

Same file, different filename due to encoding problem?

I was about to diff a backup from it's source to manually verify that the data is correct. Some chars, like åäö, is not shown correctly on the original data but as the clients (over samba) interpret ...
5
votes
2answers
14k views

iconv illegal input sequence- why?

While trying to convert a text file into its ASCII equivalent, I get error message that iconv: illegal input sequence at position. Command I use is iconv -f UTF-8 -t ascii//TRANSLIT file The ...
5
votes
2answers
17k views

Bash/Korn shell script edited on Windows throws error '…^M: not found'

Some background on the issue: I am new to scripting and wrote a simple Bash script in Windows using Notepad++. cxStopAllServicesOnSERVER.sh #!/usr/bin/bash cd "/some/path" echo "Hi. Logs can be ...
5
votes
3answers
7k views

Most common encoding for strings in C++ in Linux (and Unix?)

For creating a C++ program that is source code level portable between Windows and Linux and handles internationalization well, there are IMHO three main encodings to consider: The encoding of the C++...
5
votes
1answer
693 views

why does my emacs whitespace mode add “” to my buffer?

I'm using Putty to ssh into a RedHat box, and I'm running GNU emacs inside the putty ssh window. When I turn on whitespace-mode using M-x whitespace mode, I notice I see a "Â" before each space or ...
5
votes
1answer
609 views

Untar filenames in a character encoding different from encoding used in the filesystem

I occasionally get tarballs where the filenames are encoded in ISO-8859-1 or some other pre-Unicode scheme. My system uses UTF-8, so when I untar these archives with the usual options (tar xvf foo....