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2
votes
1answer
50 views

What is the ` character or symbol called and what is its significance outside of SE code formatting? [duplicate]

What is the ` character's name and what is its significance outside of SE code formatting because I cannot get it to work? I'm familiar with its use in the Stack Exchange forums used to format code ...
11
votes
7answers
2k views

What is the symbol *.* called?

What's the name for the *.* symbol and what is its significance?
2
votes
2answers
67 views

How to rename filename with ' or ? in file name?

I have a problem renaming a file that I'm not even sure which special characters I have in the file. I'm using CentOS 6 64bit. When I ls the file: Giko Suzo San?e - Ep1.avi but when view it in ...
2
votes
2answers
57 views

Very strange ls > textfile problem when viewing with emacs

I want to list the components of the current working directory in a text file ls -1 > textfile Output looks fine with more. 1010661085645 1010729039145 1010747080245 1010849051345 ...
1
vote
1answer
34 views

Sed: search and replace a patten with special characters which has a arbitrary string in between

I have a load of nfo files which I want to make some global substitutions for some values within each file e.g. a.nfo has the value <set>Tonight&apos;s Menu ( June 2012 )</set> ...
2
votes
2answers
81 views

delete directory with special character in filename

I have these tricky directories that I can't figure out how to delete. If I run ls -ld * I get… drwxrwxr-x 7 user1 taskfmri 2048 Jan 22 15:26 857263 drwxrwx--- 4 user2 ...
4
votes
3answers
177 views

Help Shell script to pass variables to rsync

I'm trying to create a simple wrapper shell script for rsync. When I send file names to my script, rsync can never seem to identify the correct location. The file names have spaces in them. I've tried ...
44
votes
7answers
2k views

How safe is it to cat an arbitrary file?

Sometimes when I cat a binary file by mistake, my terminal gets garbled up. Nothing a quick reset can't fix, but couldn't an attacker theoretically create a file that, when displayed on a terminal, ...
3
votes
5answers
259 views

What are the special characters to print from a script to move the cursor?

I found that by printing \r from a script the cursor moves to the beginning of the line. What character will move the cursor up one line? Where is a list of these special characters? EDIT: Working ...
1
vote
1answer
75 views

What's the practical difference between `command` and $(command)? [duplicate]

Both give the output of the command, so what is the semantic difference between the two? Some reading led me to suspect is that $(command) is Bash syntax, and the back quotes are integrated into Unix ...
-1
votes
2answers
126 views

How can I force sed to continue parsing when it hits an “invalid” character?

I have a big playlist in .pls format (created with deadbeef playing software) which also contains some badly-encoded strings. Whether this is a bug in deadbeef or one of its plugins does not really ...
3
votes
4answers
1k views

Matlab gets “crazy” after type special characters

I'm using a computer running Ubuntu and I'm connected through ssh to a RedHat machine where I use Matlab in command line mode (matlab -nodesktop). Matlab version is 7.10.0.499 (R2010a). My problem ...
2
votes
1answer
79 views

What characters TAR doesn't like?

I keep a list of photos burned to dvds for incremental backups but I got into a strange situation where a file was already burned into a dvd but tar keeps saying it's not. Here the steps to reproduce: ...
2
votes
1answer
320 views

Double line box_drawing characters in terminal

This piece of code in wikipedia: $ char=( 6a 6b 6c 6d 6e 71 74 75 76 77 78 ) $ for i in ${char[*]}; do printf "0x$i \x$i \e(0\x$i\e(B\n"; done includes one-line box-drawing characters. Are there ...
7
votes
6answers
1k views
4
votes
4answers
840 views

How to grep for pipe |

How can I grep for line containing pipe character | or for character >: files content: |this is test where is > this is none now what I need using grep command is grep -iE "<some ...
5
votes
5answers
437 views

How do I remove a file I accidentally created named $file?

I was working on a shell script and I accidentally created a file with the variable as its name. Now I have $file in my ls output, and cannot remove it. What can I do?
2
votes
2answers
769 views

Is There A Way To Find Files Containing Only Non-Printing Characters?

I've got a program that's behaving badly and has created a number of files with only a few non-printing characters. If I were to cat the files, I see nothing (since they are non-printing chars). ...
0
votes
3answers
100 views

How to delete directory ' :q!'? [duplicate]

Accidentally, i have got this directory created in my home, drwxr-xr-x 2 ubuntu ubuntu 4.0K 2012-09-06 07:27 :q!/ I want to remove this somehow. I have tried using escape characters in double ...
2
votes
4answers
1k views

sh and grep numbers only

I'm facing a problem and trying to find a solution that works in sh. If I could use bash this code would work: ls /a|grep ^[0-9] Unfortunately this is not the case with sh, and yes I need to use ...
4
votes
2answers
189 views

Strange encoding in Slackware

I am a student and learning about operating systems, I was modifying a file using vi, when I accidentally did something (I don't remember what) that change the codification/encoding and now this is ...
1
vote
1answer
478 views

tr command not working with octal sequences

I need to strip non-ASCII characters off a file. I was using the command - /usr/xpg4/bin/tr -cd '\0-\177' <non-ASCII_file.dat >ASCII_file.dat Though it worked in the past, it is not ...
0
votes
1answer
53 views

What characters in my printed boot scroll are artifacts?

I am a tech writer and I need to include a boot dump in a document. The dump the engineers gave me has some "bad characters" that I need to delete. What form does a "bad character" take? There are ...
3
votes
2answers
195 views

Hash symbol on a teletype

My issue is a bit unusual, so I want to provide a short background. I was looking at old winners of the International Obfucated C Code Contest, and came across an entry written for the PDP-11 (the ...
2
votes
1answer
204 views

tcsh vs zsh. Escape/control characters

I am having problems running this command to work in zsh: my_command -u something -s X:^0 The command works right away on tcsh, but on zsh I get: zsh: no matches found -s X:^0 This made me ...
2
votes
1answer
2k views

sed special character replace not working in shell script

I want to write a script 'test.sh' that will take a user's input and replace all special characters with a '\' + the character. My script: #!/bin/bash echo 'input='"$1" arg=`echo "$1" | sed ...
8
votes
2answers
360 views

Command line input while a running script displays strange symbols

If I use the bash shell cli and run some program which doesn't return immediately, then I input some letters (basically typing the next command before noticing the previous didn't finish) and the ...
2
votes
1answer
173 views

Control character STTY issue

I am changing control character (e.g- ^C) using stty intr ^_ under root privileges. It changes successfully. But when I am closing terminal and opening terminal again to check whether same ...
0
votes
1answer
234 views

Checking existence of file with underscore in file name in zsh

I am writing a very simple script which will link shared configuration files. For some reason it does not behave as i expected for file with underscore in name. Does _ (underscore) means something ...
13
votes
3answers
2k 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 ...
7
votes
2answers
263 views

Why doesn't `echo abc^H` just print `ab`?

As I recall, ^H means Backspace. I generated it by pressing CTRL+V, CTRL+H. So the ^H should remove the last character, as it is the same as Backspace and it should act just as if I pressed Backspace ...
2
votes
0answers
169 views

Locate enscript reported non-printable chars

I'm making a postscript of a bunch of C code, and enscript reports I have 2 non-printable chars [ 91 pages * 1 copy ] left in a.ps 2 non-printable characters non-printable character codes (decimal): ...
14
votes
3answers
5k views

Can't use exclamation mark (!) in bash?

I'm trying to use the curl command to access a http url with a exclamation mark (!) in its path. e.g: curl -v "http://example.org/!287s87asdjh2/somepath/someresource" the console replies with bash: ...
8
votes
5answers
1k views

What is `^M` and how do I get rid of it?

When I open the file in vim I am seeing strange ^M characters. Unfortunately, the world's favorite search engine does not do well with special characters in queries, so I'm asking here: What is ...
7
votes
4answers
2k views

How do I type the degree symbol under X11 (using a default English keyboard layout)?

I'm trying to put in an email the temperature outside in degrees. On my Mac, the degree symbol (°) is Option+Shift+8. But I'm writing the email in Thunderbird on an Ubuntu 10.10 with the default US ...
6
votes
1answer
393 views

How to detect and delete lines containing ˆ@

I have a simple problem: In my file, the are lines containing the string ˆ@ˆ@ˆ@ˆ@ˆ@ˆ@. I just want to delete all lines with this string, using for example the sed or grep commands. And I would like ...
1
vote
2answers
98 views

Narrow characters

It would be awesome to modify spark to print narrow characters in for example Gnome Terminal. Is this at all possible with Bash / Python?
5
votes
2answers
2k 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 ...
2
votes
1answer
198 views

Modifying a set of binary files

I have several binary files with the character 0x04 in them, and I'd like to add an escape \ character before each. Is there a script I can use to do this without needing to manually edit each one?
3
votes
1answer
358 views

Difference between ' and " on command line (bash)?

I used to use '' and "" interchangeably on the command line, but I recently noticed that '$HOME/some/dir' is not expanded, while "$HOME/some/dir" is. I searched around a little bit and found that "" ...
8
votes
2answers
9k views

What does ^d mean in ls -l | grep ^d?

When I do ls -l | grep ^d it lists only directories in the current directory. What I'd like to know is what does the caret ^ in ^d mean?
11
votes
3answers
13k views

How do I put a hat on 'e' (ê)?

Since I've migrated to linux a few years ago, one issue still remains. The ê character features a lot in my "moeder taal" (home language). In Windows making the character was easy, I simply had to ...