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This question already has an answer here: Allowed characters in Linux environment variable names 5 answers While playing around with bash and sh, I found out that the following is valid in bash: system.out.println () { printf "$1"; } but not in sh: sh: `system.out.println': not a valid identifier Why would this difference be there? Does the function defined above violate some convention (POSIX etc.) that causes this error? Noctua It's just the dots, you can't use dots in shell function names. Or any variable name, for that matter. I'll link you to this question: Allowed characters in linux

I have written an octave script file (.m) If anyone could point me out on how to run octave scripts on unix shell that would be really helpful. I do not want to execute the script by invoking octave program. I am new to unix and octave. Thanks in advance Yes, of course you can write an Octave program. Like so: $ cat octave_program #!/usr/bin/env octave ## Never forget your licence at the top of the files. 1; function [rv] = main (argv) disp ("hello world"); rv = 0; return; endfunction main (argv); $ chmod a+x octave_program # add executable permissions $ ./octave_program hello world There's a

How can I add a percentage symbol % to the end of the last line in a text file? I do not want the % to be on a new line, it must be at the end of the last line. Thanks! sed '${s/$/%/}' file 来源： https://stackoverflow.com/questions/3657860/bash-append-text-to-last-line-of-file