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Top Forums Shell Programming and Scripting Crontab command substitution problem Post 302382168 by methyl on Tuesday 22nd of December 2009 11:36:40 AM
Old 12-22-2009
Th command "who am i" will fail when run from cron. It needs a terminal.
X Windows also needs a terminal.
What are you trying to achieve?
 

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ul(1)							      General Commands Manual							     ul(1)

NAME
ul - Translates underlining for display on a terminal SYNOPSIS
ul [-i] [-t terminal] [file...] The ul command displays the named files (or standard input if none are given) with underlining shown as it would be on the printed page. OPTIONS
Causes the ul command to indicate underlining by a separate line containing appropriate - (dashes). This is useful when you want to look at the underlining in formatted text output on a cathode ray tube (CRT) terminal. Overrides the terminal kind specified in the environ- ment. The terminfo database is read to determine the appropriate sequences for underlining. If the terminal is incapable of underlining but is capable of a standout mode, then that mode is used instead. If the terminal can overstrike, or handles underlining automatically, ul acts like the cat command, simply displaying data to the screen. If the terminal cannot underline, underlining is ignored. DESCRIPTION
The ul command translates underscores to the sequence that indicates display underlining for the terminal in use, as specified by the TERM environment variable. FILES
Terminal information database. SEE ALSO
Commands: col(1), colcrt(1), man(1), more(1) Files: terminfo(4) ul(1)
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