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shc takes a shell script which is specified on the command line by the -f option and produces a C source code of the script with added encryption. The generated source code is then compiled and linked to produce a binary executable. It is a two step process where, first, it creates a filename.x.c file of the shell script file filename.
Editing a FreeBSD shell script for configuring ipfirewall. A shell script is a computer program designed to be run by a Unix shell, a command-line interpreter. [1] The various dialects of shell scripts are considered to be command languages. Typical operations performed by shell scripts include file manipulation, program execution, and printing ...
Shell programming Mandatory Construct argument lists and invoke utility PWB UNIX xgettext: C programming Optional (CD) Extract gettext calls from C source code strings IEEE Std 1003.1-2024 yacc: C programming Optional (CD) Yet another compiler compiler PWB UNIX zcat: Text processing Optional (XSI) Expand and concatenate data 4.3BSD
The example ~/.bash_profile below is ... The bug had been present in the source code ... bash has become the de facto default shell program in most Linux and Unix ...
There are many variants of Unix shell: Bourne shell sh. Almquist shell (ash) Debian Almquist shell (dash) Bash (Unix shell) bash; KornShell ksh. Z shell zsh; C shell csh. TENEX C shell tcsh; Ch shell ch; Emacs shell eshell; Friendly interactive shell fish; PowerShell pwsh; rc shell rc, a shell for Plan 9 from Bell Labs and Unix; Stand-alone ...
tcsh and sh shell windows on a Mac OS X Leopard [1] desktop. A Unix shell is a command-line interpreter or shell that provides a command line user interface for Unix-like operating systems. The shell is both an interactive command language and a scripting language, and is used by the operating system to control the execution of the system using ...
Often one of the two files is either a hard link or a symbolic link to the other, so that either name refers to the same improved version of the C shell. The original csh source code and binary are part of NetBSD. On Debian and some derivatives (including Ubuntu), there are two different packages: csh and tcsh.
The most notable example is the cd command, which changes the working directory of the shell. Since each executable program runs in a separate process, and working directories are specific to each process, loading cd as an external program would not affect the working directory of the shell that loaded it. [5]