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I am trying to use sed to change a value in a pipe. ------------------- This is the two line script CHANGE="1234" cat my_file.txt | sed 's/CANCELID/$CHANGE/' > cancel.txt ------------------- and the my_file.txt has: <v1:notificationId>CANCELID</v1:notificationId> it gets changed to $CHANGE instead of the actual value 1234 . I tried putting a \ in front

On 08/25/2015 10:50 AM, Jerry Geis wrote: > cat my_file.txt | sed 's/CANCELID/$CHANGE/' > cancel.txt sed doesn't perform environment variable expansion. That is to say that when you instruct sed to substitute "$CHANGE" for "CANCELID", "$CHANGE" is a literal string that will be substituted. bash, on the other hand, does perform environment

On 08/25/2015 11:02 AM, Gordon Messmer wrote: > > Additionally, you can avoid using "cat" to make the script more > efficient. You'll start fewer processes, and complete more quickly. cat > is almost never needed unless you actually need to con"cat"enate > multiple files. I sometimes like to use cat purely for stylistic reasons : cat file.txt |\ sed

Hello, I recently had to get Dovecot 1.1.4 to write to a "pop3/imap-before- smtp" db such that my MTA could permit relay after a successful authentication with Dovecot. The 'pop3' and 'imap' processes are executed only after a successful auth, so replacing them with wrappers which write to the db seemed the natural choice. Lo and behold, someone thought of

I cannot print to my Samba-printer from Win NT. Printing works fine under X-windows. What could be wrong? //Michael