All Questions
8 questions
1
vote
3
answers
244
views
How to tail continuously a log file that is being deleted and recreated?
I need to extract information from a log file that is deleted and recreated every time a program runs. After detecting that the file exists (again), I would like to tail it for a certain regexp.
The ...
- 173
0
votes
1
answer
302
views
How to exit a FOR loop on detecton of "error" stream using TAIL
I have a "for" loop which passes the results to a file called "results"
Occasionally an error stream is detected and the loop continues trying within the loop for a number of times ...
- 17
0
votes
1
answer
1k
views
Bash - "timeout" with tail issue
timeout 0.6s $(tail -f ./file.txt | grep -qA2 --line-buffered "detail: " | grep -E -- "$KeyNumbers")
So timeout isn't functioning as intended with this. I want it to cancel if ...
- 3
0
votes
1
answer
2k
views
run command after every line of grep output appears
I'm wanting to constantly monitor syslog and perform some computations after a regex pattern appears, and use the grep output in the command, as well as continue to monitor for new matching lines. The ...
- 956
0
votes
2
answers
3k
views
monitor log files and take actions upon a certain entry
i want to do the following:
tail -f some file {
if newline matches/contains
somestring ( perform action1;
perform action2;
...;
more actions)
somestring2 ( ...
- 11
1
vote
2
answers
4k
views
Slicing the output of grep in bash
I'm trying to read a line of text in bash using grep, piped to tail to get the final line of the file, and then slice the first three "words" (i.e. dividing them using space) of that line as elements ...
- 113
2
votes
1
answer
9k
views
how do i redirect output from tailf & grep to a file [duplicate]
All I wanted is to grep for specific lines in an ongoing log and re-direct it to some file..
tailf log | grep "some words"
Now, I want the above command output to get re-directed to some file in on-...
- 1,071
44
votes
3
answers
120k
views
Piping from grep to awk not working
I am trying to grep the ongoing tail of file log and get the nth word from a line. Example file:
$ cat > test.txt <<EOL
Beam goes blah
John goes hey
Beam goes what?
John goes forget it
Beam ...
- 9,817