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Using the Korn Shell Summary .profile Prompt Command Editing History Set PATH Special Built-ins Regular Built-ins

Using the Korn Shell

Command History Display, fix and repeat previously entered commands. Korn

Turn on extended command history

To start recording the date and time that each command is executed, set the EXTENDED_HISTORY environment variable to ON:

export EXTENDED_HISTORY=ON

The CUT (Coordinated Universal Time) timestamp will be appended to each line of the ~/.sh_history file.

Display command history

The command history can be displayed with various history or fc (fix command) commands:

history fc -l history n​ fc -l n​
fc -t history -t fc -t n​ history -t n​

n specifies which command the listing is to start with. If it is negative, then the listing starts with the nth previous commmand; if it is non-negative, the listing starts with the specified command number. If -t is specified, the output will include the timestamps.

Repeat a previous command

r

without any parameters repeats the preceding command.

r searchtext​

repeats the last command starting with the given search text.

r -n​

repeats the nth previous command.

r n​

repeats the specified command. The number of a command can be determined by displaying the command history or by setting the prompt to include the command number.

Tuesday October 3, 2006
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