stdout

来源： https://stackoverflow.com/questions/13833088/why-doesnt-local-work-on-stderr-and-stdout

问题 I have the following Dockerfile: FROM ubuntu:16.04 RUN apt-get update VOLUME ["/LOGS"] COPY ./testServer . ENTRYPOINT ./testServer 8600 "testServer" has log files that are being written to. They are located in the directory "LOGS". Each time "testServer" is started, a new log is created. What I wanted to do was to "tail" the latest log file in the directory to stdout / stderr. I tried adding: CMD ["/bin/sh", "-c", "tail $( ls -Art /LOGS | tail -n 1 ) > out_server.log 2>&1"] to the Dockerfile

问题 I have this long process in a bash script (one of many) and so I'm experimenting with sending all output to a separate window to monitor, with any errors logged to errorlog.txt . For example: rsync -vahPz foo@bar:/bigfolder/ ./ >> /dev/pts/4 2>> errorlog.txt Trouble is that above doesn't display any errors on the separate window. Is there a way to redirect errors to both my separate window at /dev/pts/4 and errorlog.txt , while still redirecting normal output to /dev/pts/4 too? Something like

问题 I have this long process in a bash script (one of many) and so I'm experimenting with sending all output to a separate window to monitor, with any errors logged to errorlog.txt . For example: rsync -vahPz foo@bar:/bigfolder/ ./ >> /dev/pts/4 2>> errorlog.txt Trouble is that above doesn't display any errors on the separate window. Is there a way to redirect errors to both my separate window at /dev/pts/4 and errorlog.txt , while still redirecting normal output to /dev/pts/4 too? Something like

问题 Hey I am using the same old code for getting all the code outputs PyQT5 QTexBrowser GUI console, but I am also getting next line character ("\n") in all new lines. Code URL - pipe the output of sys.stdout to text browser in pyqt Below is the code I am using from above URL - class Port(object): def __init__(self, view): self.view = view def write(self, *args): # self.view.append(str([*args])) # self.view.append(str(*args).rstrip("\n").lstrip("\n")) self.view.append(*args) GUI Console Output -

问题 Using the python logging package, and writing a class Log, I'd like to tee stdout and stderr to a log file : log = Log("log.txt") print "line1" print "line2" print >>sys.stderr, "err1" del log print "line to screen only" The output log file would contain : 16/11/2017 09:51:58 INFO - line1 16/11/2017 09:51:58 INFO - line2 16/11/2017 09:51:58 INFO - err1 Any idea how to write this Log class, keeping the advantages of the "logging" package (time-stamps, ...) ? 回答1: The right way to achieve what

问题 Using the python logging package, and writing a class Log, I'd like to tee stdout and stderr to a log file : log = Log("log.txt") print "line1" print "line2" print >>sys.stderr, "err1" del log print "line to screen only" The output log file would contain : 16/11/2017 09:51:58 INFO - line1 16/11/2017 09:51:58 INFO - line2 16/11/2017 09:51:58 INFO - err1 Any idea how to write this Log class, keeping the advantages of the "logging" package (time-stamps, ...) ? 回答1: The right way to achieve what

问题 Using fork I created a child and in the child I'm executing the ls command using execl . To send the output to parent,I used pipe and dup . The parent then prints the output. The code gives the expected output, but when I tried to restore back the stdout which I saved initially in stdout_holder , nothing is printed on terminal (when I used printf("hello") or the execl statement below it). However after few observations, it is observed that hello is printed only when nothing is done after

问题 Using fork I created a child and in the child I'm executing the ls command using execl . To send the output to parent,I used pipe and dup . The parent then prints the output. The code gives the expected output, but when I tried to restore back the stdout which I saved initially in stdout_holder , nothing is printed on terminal (when I used printf("hello") or the execl statement below it). However after few observations, it is observed that hello is printed only when nothing is done after

问题 Using fork I created a child and in the child I'm executing the ls command using execl . To send the output to parent,I used pipe and dup . The parent then prints the output. The code gives the expected output, but when I tried to restore back the stdout which I saved initially in stdout_holder , nothing is printed on terminal (when I used printf("hello") or the execl statement below it). However after few observations, it is observed that hello is printed only when nothing is done after