Owner's manual

16 pwd
17 cd /u/ben/reports
18 more sales
Editing and Executing Command Lines
To display and edit command lines 15 through 18 with the vi editor, enter:
$ fc -e vi 15 18
ls -la
pwd
cd /u/ben/reports
more sales
~
~
~
~
"/tmp/sh10268.3" 4 lines 40 characters
After making your edits, write and exit the file with the vi :wq! command. The command lines
in the file are then reexecuted.
Replacing and Reexecuting Command Lines
Assume that you have just entered the echo hello command, and now you wish to replace
hello with goodbye. To do the replacement and reexecute the command line, enter:
$ echo hello
hello
$ fc -e - hello=goodbye echo
echo goodbye
goodbye
The Shell Environment
Each time you run osh, your OSS shell creates and maintains a working environment for you.
Your environment defines such characteristics as your user identity, where you are working on the
system, and what commands you are running.
Your working environment is created by variables defined in two files:
defines environment variables/etc/profile
defines local shell variables.profile
The /etc/profile file contains information that creates a default environment for all users. It is
maintained by the system administrator. When you run osh, the information in /etc/profile
is executed first, before the information in the .profile file. These variables are often called
“environment variables.”
The Shell Environment 43