Korn Shell: Unix and Linux Programming Manual, Third Edition, The By Anatole Olczak
Table of Contents
Appendix G. Pdksh Quick Reference
The primary prompt (PS1 - default $ or # for super-users) is displayed whenever the Korn shell is ready to read a command. The secondary prompt (PS2 - default >) is displayed when the Korn shell needs more input.
Command Execution Format
command1;command2
execute command1 followed by command2
command &
execute command asynchronously in the background; do not wait for completion
command1 | command2
pass the standard output of command1 to standard input of command2
command1 && command2
execute command2 if command1 returns zero (successful) exit status
command1 || command2
execute command2 if command1 returns non-zero (unsuccessful) exit status
command | &
execute command asynchronously with its standard input and output attached to the parent shell; use read p/print p to manipulate the standard input/output
