unix

问题 I'm attempting to build a Docker image of a React+TypeScript+NodeJS application built with Webpack 2.0, but I get the following error > frontend@0.0.1 build / > webpack -p --config configs/webpack.config.ts --env.build --env.sourceMap { isDev: false } glob error { Error: EPERM: operation not permitted, scandir '/proc/1/map_files/55836c87b000-55836c897000' errno: -1, code: 'EPERM', syscall: 'scandir', path: '/proc/1/map_files/55836c87b000-55836c897000' } Error: EPERM: operation not permitted,

问题 The following is the content stored in my file This is my Input So, using wc -c command we can get the number of characters stored in the file. My expected output for above file that edited by using VIM in Ubuntu is 16. But, wc -c command returns 17 . Why is the output like this? There isn't even a carriage return at end of line. So, what is the 17th character? 回答1: of course you had enter. maybe you cant see it. consider these two examples: echo -n "This is my Input" | wc -c 16 because -n is

问题 I did a=1234 let "a=a+1" on command line and it's fine. But when I do the same in a shell script. It prints out an error that "let: not found". Here is the script file. #!/bin/sh a=1234; let "a=a+1"; echo "$a"; Thanks, 回答1: The problem is likely that /bin/sh is not the same as, or does not behave the same as, your normal shell. For example, when bash is invoked as /bin/sh , it provides a subset of its normal features. So, you may need to change your shebang line to use a different shell: #!

问题 I am writing a Perl script and I need to execute Unix Ctrl + Z on the script. How can I do it in Perl ? thanks. 回答1: From perl you can send signals to processes with the function kill, which has the same name as the Unix command line tool that does the same thing. The equivalent to Ctrl + Z is running kill -SIGTSTP pid you need to find out what numeric value your TSTP signal has on your system. You would do this by running kill -l TSTP on the command line. Let's say this returns 20 Then in

问题 I am writing a Perl script and I need to execute Unix Ctrl + Z on the script. How can I do it in Perl ? thanks. 回答1: From perl you can send signals to processes with the function kill, which has the same name as the Unix command line tool that does the same thing. The equivalent to Ctrl + Z is running kill -SIGTSTP pid you need to find out what numeric value your TSTP signal has on your system. You would do this by running kill -l TSTP on the command line. Let's say this returns 20 Then in

问题 I want to iterate over PL/SQL rows in SHELL script and for each row I want to execute some code using current row. At this point I got: VALUE='sqlplus -s /nolog <<EOF CONNECT ${CONNECT} select smth from table; / EXIT EOF' for i in "${VALUE[@]}" do ##some code using "i" variable done At this point for 5 rows code executes only once. It appears it doesn't iterate at all. Any ideas how can I fix that? 回答1: You can iterate your resultset as follows: SQL> select car_model from available_models 2

问题 Here are the contents of the file: Person Name 123 High Street (222) 466-1234 Another person 487 High Street (523) 643-8754 And these two things give the same result: $ awk 'BEGIN{FS="\n"; RS="\n\n"} {print $1, $3}' file_contents $ awk 'BEGIN{FS="\n"; RS=""} {print $1, $3}' file_contents The result given in both cases is: Person Name (222) 466-1234 Another person (523) 643-8754 RS="\n\n" actually makes sense, but why is RS="" also treated the same way? 回答1: They aren't treated the same. RS=""

问题 So, I'm trying to get into creating docker images and I managed to get one going. It was qBittorrent, everything went fine until it started downloading files. All of qBits' directories are owned by 1000:1000 but as soon as it starts downloading a file, my docker-host machine says that the file folder is owned by root:root . How can I make sure that everything the container creates is owned by 1000:1000 ? I need it to be owned by that because other Docker containers, such as Radarr, need to

问题 So, I'm trying to get into creating docker images and I managed to get one going. It was qBittorrent, everything went fine until it started downloading files. All of qBits' directories are owned by 1000:1000 but as soon as it starts downloading a file, my docker-host machine says that the file folder is owned by root:root . How can I make sure that everything the container creates is owned by 1000:1000 ? I need it to be owned by that because other Docker containers, such as Radarr, need to

问题 #bin/bash INPUT_DIR="$1" INPUT_VIDEO="$2" OUTPUT_PATH="$3" SOURCE="$4" DATE="$5" INPUT="$INPUT_DIR/sorted_result.txt" COUNT=1 initial=00:00:00 while IFS= read -r line; do OUT_DIR=$OUTPUT_PATH/$COUNT mkdir "$OUT_DIR" ffmpeg -nostdin -i $INPUT_VIDEO -vcodec h264 -vf fps=25 -ss $initial -to $line $OUT_DIR/$COUNT.avi ffmpeg -i $OUT_DIR/$COUNT.avi -acodec pcm_s16le -ar 16000 -ac 1 $OUT_DIR/$COUNT.wav python3.6 /home/Video_Audio_Chunks_1.py $OUT_DIR/$COUNT.wav python /home/transcribe.py --decoder