These interactive features include job control, command line editing, command history and aliases. Each of these features is described in this manual. Next: Basic Shell Features , …

2020年9月22日 · Bash is the GNU Project's shell—the Bourne Again SHell. This is an sh-compatible shell that incorporates useful features from the Korn shell (ksh) and the C shell …

2022年9月19日 · Some of the shells that Bash has borrowed concepts from are the Bourne Shell (sh), the Korn Shell (ksh), and the C-shell (csh and its successor, tcsh). The following menu …

A Unix shell is both a command interpreter and a programming language. As a com- mand interpreter, the shell provides the user interface to the rich set of gnu utilities.

Bash reads and executes commands from this file, then exits. Bash’s exit status is the exit status of the last command executed in the script. If no commands are executed, the exit status is 0.

Bash uses the value formed by expanding the rest of parameter as the new parameter; this is then expanded and that value is used in the rest of the expansion, rather than the expansion …

5.2 Bash Variables. These variables are set or used by Bash, but other shells do not normally treat them specially. A few variables used by Bash are described in different chapters: …

By default, sed will consider the files specified on the command line as a single continuous long stream.

The order of expansions is: brace expansion; tilde expansion, parameter and variable expansion, arithmetic expansion, and command substitution (done in a left-to-right fashion); word splitting; …

Bash examines the value of the array variable PROMPT_COMMAND just before printing each primary prompt. If any elements in PROMPT_COMMAND are set and non-null, Bash executes …