Escape sequences such as encodings of terminal commands and function keys

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6
votes
1answer
219 views

How to use less in a script without getting ESC escape characters?

When I use less at the command line the output is like but when I use less from within a bash script I get: How can I use less in a bash script and not get all the escape characters and have it ...
1
vote
1answer
24 views

Escape strings to be posted via curl

I am trying to make a script that takes some atom feeds and posts them to slack through the Slack API via curl. What I have now works for simple texts, but some of them have double quotes or & ...
1
vote
2answers
542 views

How to escape in YAML the correct way?

On CentOS 7 I am using cloud-init to spin off a droplet using the DigitalOcean API which requires YAML formatting. I got most parts working fine, but struggle on escaping the commands running at ...
0
votes
2answers
29 views

Problem with understanding keys bindings

I have a settings and a zsh session ~ bindkey | grep help "^[H" run-help "^[h" run-help Why when i press "Control + [ + h" word under cursor removes and nothing happens, but if i press "Alt + ...
6
votes
2answers
8k views

export HTTP_PROXY and special characters in passwd

Suppose for the sake of argument my password below is abc123@ I need to authenticate my linux machine through a corporate proxy to get patches and updates... normally I'd use this: export ...
15
votes
2answers
556 views

How do I use grep while keeping the original text color? [duplicate]

For example, I have a output: Hello, this is the output. (let's say that for example hello is colored red, and the is colored green, and output is colored purple). Now, let's say that this is the ...
11
votes
3answers
1k views

Escape sequences in output of script called from ncurses application

I'm currently running mcabber as my Jabber client (which uses ncurses) in a tmux session on my homeserver. Locally i run iTerm2 as a terminal emulator, which supports the triggering of growl ...
4
votes
3answers
59 views

Is there any objective benefit to escape sequences over tput?

In people's '.*rc' files I see online or in various code, I tend to see a lot of people who manually use ANSI escape sequences instead of using tput. I had the understanding that tput is more ...
1
vote
0answers
22 views

How to remove a single quote from a file name? [duplicate]

I have some podcasts on my radio server which contain a timestamp when they should be played. I noticed one of them is put into single quotes 'filename.mp3', and I'm unable to remove them. Check this: ...
2
votes
2answers
215 views

How can a bash script detect support for window titling escape characters?

I have a debug trap that runs every time I enter a command in bash that sets the window title to indicate what command is running. I'm leaving out all the configuration details and boil it down to: ...
3
votes
1answer
59 views

What does it mean when characters appear on the prompt after an operation?

Compare the following two commands: mysqldump database_name --hex-blob -uuser_name -p | tee database_name_tee.sql mysqldump database_name --hex-blob -uuser_name -p > database_name_out.sql If I ...
0
votes
0answers
33 views

double quote single quote combination BCP on Linux

Can someone show me the correct way to structure this command? FYI - I think this boils down to an escape issue. There are several posts close but I have yet to find a solution which will run as a ...
3
votes
2answers
290 views

Graphical console applications in Emacs

I am having trouble running htop within an ansi-term in Emacs 24.2. It looks like some of the control characters are not interpreted correctly. I thought ansi-term was capable of handling font ...
0
votes
2answers
805 views

How to remove the ESC characters from Notepad++

How to remove the ESC characters in black background from Notepad++ v6.7.3
-1
votes
2answers
35 views

blink code(escape code) has been removed?

According to Bash tips: Colors and formatting (ANSI/VT100 Control sequences) I attemped to active blink code in my program, But may be blink code has been eliminated. Is it true? If is not true, ...
1
vote
1answer
77 views

What do \t and \a mean in a shell script?

What do \t and \a perform or do in a script? For example, I am writing a script and it goes like this \t it displays a simple script \a
4
votes
2answers
408 views

Is it possible to use ANSI color escape codes in Bash here-documents?

I'm printing a message in a Bash script, and I want to colourise a portion of it; for example, #!/bin/bash normal='\e[0m' yellow='\e[33m' cat <<- EOF ${yellow}Warning:${normal} This script ...
3
votes
4answers
54 views

Bash converting path names for sed so they escape

I'm having a problem with a script. It is meant to change a value in a file called %DIR% so that it becomes a path name. The problem is the slashes in the directory name upset sed, so I get weird ...
0
votes
2answers
56 views

awk FS with back slashes

I use the command find . -maxdepth 1 -not -type d which generates output like ./filename.1.out I pipe the find command output to awk. The goal is to split on either the literal ./ or .. I have it ...
3
votes
1answer
82 views

What's the maximum length for a multibyte escape sequence?

ESC sends \x1b. That's 1 byte: the actual escape character. Page Up sends \x1b[H. That's 3 bytes. F2 sends \x1b[OQ. That's 4 bytes. F5 sends \x1b[15~. That's 5 bytes. What's the maximum length for ...
6
votes
2answers
327 views

What is the gnome-terminal ANSI escape sequence for “CTRL + arrow/s”?

I am trying to configure my bash ~/.inputrc to these settings (Note: ←, → mean the left and right arrow keys) Ctrl + ← - should jump back a word Ctrl + → - should jump forward a word Currently I ...
1
vote
1answer
42 views

Double quotes issue in bash script

I have a shell script I am trying to get working. I need the output to be a certain way and I know I'm just not escaping the characters correctly. script: #!/bin/bash set -x DATE=$(date ...
6
votes
4answers
352 views

is there a pastebin service that supports terminal escape sequences?

Is there a pastebin service that supports colors? I understand some of them have syntax hilighting, but I'd like to do arbitrary coloring, preferably using the terminal escape sequences. Example, i'd ...
1
vote
1answer
76 views

Is it possible to do a here-document in one line or echo verbatim?

I often find myself testing out a command (e.g. cat file | awk 'stuff') in the shell and when I'm satisfied with the way it works, I append the command to a script file. Let's say this is the command ...
2
votes
1answer
5k views

Proper escaping of double quotations for curl post data?

I'm trying to test out a server, by sending it JSON data and reading the response. I need to POST data like {"item":"value with spaces"} but when I use curl I find that it sends the backslashes as ...
1
vote
1answer
42 views

Maximizing tmux session shows weird ANSI Sequences

I have a tmux session inside Putty. It was fine for past many months, but now I see a strange thing. When I maximize a normal Putty window, and if cursor is not on a new line, then I get some weird ...
2
votes
2answers
69 views

sed to match pattern between matching curly braces

From a pattern such as [string 1]{string 2} I want to extract string 2, the string between the last pair of matching curly braces -- that is delete [string 1] and the open { and close }. My ...
3
votes
2answers
47 views

How to interpret ' character in a string passed through SSH

New to BASH and Linux and need some quick help. I have written a quick bash script that asks the user for a username and password from the command line and passes that info to a remote server later ...
3
votes
2answers
92 views

Issue with column command and color escape codes

I'm colorizing the header of a table formatted with column -ts $'\t' Works well without color codes, but when I add color codes to the first line column doesn't properly align the output. Without ...
0
votes
1answer
64 views

Substituting \ for \\ in column

I exported a column of thousands of salts from mysql for hashcat. Every instance of the character \ was replaced with a double character \\ in the exported column. Is there a way to either sed or awk ...
3
votes
2answers
147 views

Shell-independent escaping for strings in scripts

I just struggled (again) over this: # only in bash NORM=$'\033[0m' NORM=$'\e[0m' # only in dash NORM='\033[0m' # only in bash and busybox NORM=$(echo -en '\033[0m') The goal is to include special ...
19
votes
3answers
733 views

How to prevent random console output from breaking the terminal?

There are many questions on SE that show how to recover from terminal broken by cat /dev/urandom. For those that are unfamiliar with this issue - here what it is about: You execute cat /dev/urandom ...
1
vote
2answers
90 views

Escape characters from echo -e

I have the following in my .bashrc file I use for a log: function log(){ RED="\e[0;31m" RESET="\e[0m" echo -e "${RED}$(date)" "${RESET}$*" >> "$HOME"/mylog.txt } But when I do ...
8
votes
6answers
8k views

How can I create a file with multiple lines from the command-line? [duplicate]

How can I enter the following contents in a file: Hi abcd I tried using echo "Hi\nabcd" >> ab.txt, but in the file it's written as is (the \n is included, instead of a newline)
1
vote
2answers
1k views

bash - Function to escape character?

I am trying to automate some of my stuff and facing a issue, the problem boils down to escaping the value that is being passed as a argument to the script. myScript.sh #!/bin/bash loadPatch -name ...
17
votes
4answers
30k views

How to escape quotes in shell?

I'm having trouble with escaping characters in bash. I'd like to escape single and double quotes while running a command under a different user. For the purposes of this question let's say I want to ...
0
votes
0answers
25 views

Escape special chars in csh alias

I want to create an alias for the following thing: diff -r <dir1> <dir2>| grep diff | grep -v "Files " | grep -v "\.git" \ | awk '{print "tkdiff " $3 " " $4}' I am getting lost with ...
2
votes
2answers
57 views

How to escape metacharacters for egrep like metaquote from Perl?

Perl has a function called metaquote() to escape all special characters for a regular expression. Is there an equivalent technique for egrep? Example: If I am searching for the string abc.def.ghi, I ...
2
votes
4answers
171 views

echo \\* - bash backslash escape behavior, is it evaluated backwards?

So in bash, When I do echo \* * This seems right, as * is escaped and taken literally. But I can't understand that, when I do echo \\* \* I thought the first backslash escaped the second one ...
2
votes
2answers
97 views

Why does “shift-tab” result in “Escape” in the terminal?

I just noticed this by accident. I use the vi readline mode (run set -o vi in bash) so it is particularly noticeable; in emacs readline mode I don't think Esc does anything, but in vi mode it exits ...
27
votes
6answers
20k views

Removing control chars (including console codes / colours) from script output

I can use the "script" command to record an interactive session at the command line. However, this includes all control characters and colour codes. I can remove control characters (like backspace) ...
3
votes
4answers
414 views

Executing a 'perl command' from shell and executing the same command from perl script using system command

I am not able to take care of special characters. I have the following perl script. while(@mapping_array[$i]) { chomp(@mapping_array[$i]); my @core= split ( / / , $mapping_array[$i]) ; ...
5
votes
2answers
187 views

Background color whitespace when end of the terminal reached

I am working with control sequences for text formatting and have stumbled upon some unexpected behavior. I have some text to output, in the middle of this text there is some smaller text block ...
1
vote
2answers
143 views

change colour of `echo` for particular line in shell script in Linux?

I want to change the colour of echo for a particular statement in a Linux shell script example : echo "invalid entries" echo "valid entries" echo "valid entry" I want the red color for echo ...
4
votes
4answers
886 views

Null and escape characters

I know that a filename in Linux has no restriction whatsoever except for two characters '/' and '\0'. I know that '/' is prohibited because it is a directory separator but is there any other reason ? ...
2
votes
3answers
121 views

How to substite a " in awk?

For example, I need to change a " into the word quote in to change a string with a " at some point into a string with a quote at some point I have tried: $ echo 'a string with a " at some ...
0
votes
1answer
43 views

expansion with escape character help

I am having trouble doing expansion with this because of the escape character. UNF\1122 Right now I am trying to stick with the really simple example of: ps -ef | grep $USER Eventually after I ...
4
votes
3answers
455 views

How to print control characters with escape sequences?

I have defined the color red using tput red=$(tput setaf 1) to colorize warnings in my program. This works fine: printf '%sfail\n' "$red" # prints 'fail' in red But on one occasion I would like ...
1
vote
1answer
78 views

Why is vi (but not cat) showing ^[[31m[^[[m^[[31m" after I use sed and output to a file I then edit? [closed]

When I use cat Variables/user-extensions.js | sed -e 's/css/XXX/' on an input file of the form storedVars["css_body"] = "css=body"; storedVars["css_main"] = "css=main"; I see output such as ...
1
vote
2answers
104 views

Find OS X terminal key combination/escape sequence for Ctrl-'

One of my Emacs keybindings is C-', which works well in GUI. In terminal however, it is not being recognised. I understand that I need to figure out the actual characters sent to the terminal by C-' ...