Linux Shells by Example

11.4. Debugging Scripts

TC shell scripts often fail due to some simple syntax error or logic error. Options to the tcsh command are provided to help you debug your programs. See Table 11.3.

Table 11.3. echo (-x) and verbose (-v)

As options to tcsh
tcsh -x scriptname	Display each line of script after variable substitution and before execution.
tcsh -v scriptname	Display each line of script before execution, just as you typed it.
tcsh -n scriptname	Interpret but do not execute commands.
As arguments to the set command
set echo	Display each line of script after variable substitution and before execution.
set verbose	Display each line of script before execution, just as you typed it.
As the first line in a script
#!/bin/tcsh -xv	Turn ...