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Full Discussion: Need help to delete special characters exists only at the end of the each record in UNIX file?
Top Forums UNIX for Advanced & Expert Users Need help to delete special characters exists only at the end of the each record in UNIX file? Post 303029161 by Don Cragun on Tuesday 22nd of January 2019 03:18:46 PM
Old 01-22-2019
Quote:
Originally Posted by RudiC
You weren't too far off in your own attempt. Try, after correcting the already commented on syntax errors and anchoring the regex at the line end,



Code:
sed 's[^a-zA-Z|0-9]$/ /g; s/  */ /g' file

Hi RudiC,
I'm afraid that still won't work:
  1. There is a <slash> character missing after the s in the substitute command.
  2. That BRE will only match one "special" character at the end of a line.
  3. And, it still coalesces sequences of multiple <space>s not found at the end of a line to a single <space>.
Point #1 above leads to a syntax error. The other two points don't meet the (still poorly specified) requirements for this problem.

Staying closer to what was given originally, we could try:
Code:
sed 's/[^a-zA-Z|0-9]*$/ /g; s/  *$//' file

but that just uses two substitutions to do what I think I did in post #6 with a single substitution.

You're usually better with sed than I am. Am I missing something here? Smilie

~ Don
These 2 Users Gave Thanks to Don Cragun For This Post:
Neo RudiC
 

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LEARN ABOUT LINUX

set_color

set_color(1)							       fish							      set_color(1)

NAME

       set_color - set_color - set the terminal color

set_color - set the terminal color
   Synopsis
       set_color [-v --version] [-h --help] [-b --background COLOR] [COLOR]

   Description
       Change the foreground and/or background color of the terminal. COLOR is one of black, red, green, brown, yellow, blue, magenta, purple,
       cyan, white and normal.

       o -b, --background Set the background color

       o -c, --print-colors Prints a list of all valid color names

       o -h, --help Display help message and exit

       o -o, --bold Set bold or extra bright mode

       o -u, --underline Set underlined mode

       o -v, --version Display version and exit

       Calling set_color normal will set the terminal color to whatever is the default color of the terminal.

       Some terminals use the --bold escape sequence to switch to a brighter color set. On such terminals, set_color white will result in a grey
       font color, while set_color --bold white will result in a white font color.

       Not all terminal emulators support all these features. This is not a bug in set_color but a missing feature in the terminal emulator.

       set_color uses the terminfo database to look up how to change terminal colors on whatever terminal is in use. Some systems have old and
       incomplete terminfo databases, and may lack color information for terminals that support it. Download and install the latest version of
       ncurses and recompile fish against it in order to fix this issue.

Version 1.23.1							  Sun Jan 8 2012						      set_color(1)
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