Tagged Questions
3
votes
4answers
389 views
Make cp return an error value if the target exists
Is there a way to make cp (from GNU coreutils on Linux) return a nonzero value in case the target file does already exist?
Or is there any other small utility which is commonly available and which ...
20
votes
6answers
6k views
Correct locking in shell scripts?
Sometimes you have to make sure that only one instance of a shell script is running at the same time.
For example a cron job which is executed via crond that does not provide
locking on its own (e.g. ...
5
votes
3answers
2k views
Storing output of command in shell variable
I have an operation using cut that I would like to assign result to a variable
var4=ztemp.xml |cut -f1 -d '.'
I get the error:
ztemp.xml is not a command
The value of var4 never gets ...
