The tag has no wiki summary.

learn more… | top users | synonyms

-1
votes
0answers
19 views

replace $ with £ using sed command [duplicate]

I have text file DollarToPound.txt with some Dollar signs ($) please provide a shell script to replace dollar symbol with Pound(£) with sed command. iam getting command garbled error!!! please help. ...
1
vote
1answer
53 views

Forcing the system to allow me to insert any character in the file name

I had an exam this week, and one of the questions was (with one correct answer): The file name can contain the character: a) \ b) / c) ? d) ! I chose c) ? because it looked ...
1
vote
2answers
90 views

printing special characters in awk output

I have a large file that contains lot MQ messages with RFH2 header. Each message in the file is separated by a blank line. Now I need to split this large file into small files each containing single ...
2
votes
1answer
63 views

csplit not obeying backslash r \r as carriage return

I have a file with \r\n line endings (CRLF carriage return line feed). This command works: $ csplit --silent --prefix=email-emailbad.txt- \ --digits=3 emailbad.txt '/^\.^M/'+1 '{*}' This ...
2
votes
1answer
80 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
99 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
79 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
78 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
152 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
339 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 ...
3
votes
5answers
437 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
80 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
154 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 ...
2
votes
1answer
104 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
482 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 ...
4
votes
4answers
2k 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 ...
0
votes
3answers
124 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
2k 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 ...
2
votes
2answers
1k views

What does the tilde (~) mean at the end of a filename? [duplicate]

What is the file with the ~ at the end of the filename for? $ ls # aliased to add flags -rwxrwxr-x 1 durrantm 2741 May 16 09:28 strip_out_rspec_prep_cmds.sh~* drwxrwxr-x 13 durrantm 4096 May 16 ...
49
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, ...
1
vote
1answer
589 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
58 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 ...
2
votes
1answer
212 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 ...
3
votes
2answers
224 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
3k 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
406 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 ...
7
votes
2answers
414 views

How can I switch 2 characters in vi?

I like the fact that I've memorized ddp for switching two lines (i.e. dd deletes the line and then p puts it back '1 higher'). Is there are similar set of keystrokes for switching 2 characters so ...
2
votes
1answer
193 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
248 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 ...
14
votes
3answers
3k 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
273 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
191 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): ...
4
votes
2answers
860 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). ...
14
votes
3answers
6k 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
2k 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 ...
6
votes
1answer
474 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
101 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
3k 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
217 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?
5
votes
5answers
461 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?
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 ...
4
votes
2answers
196 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 ...
7
votes
6answers
1k views

how to type “smart quotes” (U+201C, U+201D)

It's like this: “ (U+201C) ” (U+201D).
3
votes
1answer
373 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 "" ...
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 ...
10
votes
2answers
10k 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
14k 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 ...