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Top Forums UNIX for Beginners Questions & Answers Deleting the last non blank line from a file Post 303011721 by Don Cragun on Tuesday 23rd of January 2018 12:38:03 AM
Old 01-23-2018
The awk utility would be one way to do this. The ed and ex utilities could easily be used to do this in a shell script. The vi utility is an excellent way to do this if you want to do it interactively.

Depending on what operating system you're using, you might want to use the tac utility if your operating system includes that utility. You could do this entirely in the shell command language, but it would be easier with some shells than it would be with others.

There are probably thousands of ways to do this on most UNIX and UNIX-like operating systems. Without knowing what shell and operating system you're using, what experience you have, and what you have tried to solve this problem on your own it is hard to make any meaningful suggestions.
 

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platform::shell(n)					       Tcl Bundled Packages						platform::shell(n)

__________________________________________________________________________________________________________________________________________________

NAME
platform::shell - System identification support code and utilities SYNOPSIS
package require platform::shell ?1.1.4? platform::shell::generic shell platform::shell::identify shell platform::shell::platform shell _________________________________________________________________ DESCRIPTION
The platform::shell package provides several utility commands useful for the identification of the architecture of a specific Tcl shell. This package allows the identification of the architecture of a specific Tcl shell different from the shell running the package. The only requirement is that the other shell (identified by its path), is actually executable on the current machine. While for most platform this means that the architecture of the interrogated shell is identical to the architecture of the running shell this is not generally true. A counter example are all platforms which have 32 and 64 bit variants and where a 64bit system is able to run 32bit code. For these running and interrogated shell may have different 32/64 bit settings and thus different identifiers. For applications like a code repository it is important to identify the architecture of the shell which will actually run the installed packages, versus the architecture of the shell running the repository software. COMMANDS
platform::shell::identify shell This command does the same identification as platform::identify, for the specified Tcl shell, in contrast to the running shell. platform::shell::generic shell This command does the same identification as platform::generic, for the specified Tcl shell, in contrast to the running shell. platform::shell::platform shell This command returns the contents of tcl_platform(platform) for the specified Tcl shell. KEYWORDS
operating system, cpu architecture, platform, architecture platform::shell 1.1.4 platform::shell(n)
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