The Linux Documentation Project
HTML (read online) HTML (read online, single file, 2.3M) HTML (tarred and gzipped package, 674K) PDF (2.7M) PostScript (1.4M) text (510K) SGML (327K) PluckerDB (690K) This document is both a tutorial and a reference on shell scripting with Bash. It assumes no previous knowledge of scripting or programming, but progresses rapidly toward an intermediate/advanced level of instruction . . . all the wh
Introduction to if
7.1.1. GeneralAt times you need to specify different courses of action to be taken in a shell script, depending on the success or failure of a command. The if construction allows you to specify such conditions. The most compact syntax of the if command is: if TEST-COMMANDS; then CONSEQUENT-COMMANDS; fi The TEST-COMMAND list is executed, and if its return status is zero, the CONSEQUENT-COMMANDS lis
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