shell script追踪和调试

[work@www sh]$ sh -n for.sh 
for.sh: line 7: syntax error near unexpected token `o'
for.sh: line 7: `o'
[work@www sh]$ 

3. shell调试打印

[work@www sh]$ sh -v for.sh 
#!/bin/bash

# desc : for loop


for animal in dog cat pig 
do
    echo "HI, ${animal}"

done
HI, dog
HI, cat
HI, pig
exit;
[work@www sh]$

[work@www sh]$ sh -x for.sh 
+ for animal in dog cat pig
+ echo 'HI, dog'
HI, dog
+ for animal in dog cat pig
+ echo 'HI, cat'
HI, cat
+ for animal in dog cat pig
+ echo 'HI, pig'
HI, pig
+ exit
[work@www sh]$