LẬP TRINH SHELL

L P TRÌNH SHELL Nội dung L p trình shell Đặc trưng c a script Cấu trúc shell-script Create File & Run Script Review commands Parameter & Variables   Parameter  Entity that stores values type  positional parameters     arguments present on command line referenced by number special parameters  set by shell to store info about aspects of current state Variable   identified by a name Contain values Positional Parameters Giứ trị default c a tham số nocaseglob globstar  allows use of ** to descend recursively into directories &subdirectories looking for matching files review Using script for automating admin  Create Commands That Affect Multiple Systems  Simple Multi-SSH   simple shell script that executes specified command on every machine listed in configuration file Group-Based Multi-SSH Simple Multi-SSH Group-Based Multi-SSH  run a command on a certain subset of machines  instead of being forced to run it on every machine in every circumstance Copying Files   copies one or more local files, recursively, to a given directory on multiple machines first arg   local file, or a list of local files contained within quotes second arg   a destination directory Following the file(s) and destination directory is one or more group names ...Nội dung L p trình shell Đặc trưng c a script Cấu trúc shell- script Create File & Run Script Review commands Parameter & Variables ... parameters     arguments present on command line referenced by number special parameters  set by shell to store info about aspects of current state Variable   identified by a name Contain values