I just want to get the files from the current dir and only output .mp4 .mp3 .exe files nothing else. So I thought I could just do this: ls | grep \.mp4$ | grep \.mp3$ | grep \.exe$ But no, as the first grep will output just mp4’s therefor the other 2 grep’s won’t be … Read more
I have a directory with roughly 100000 files in it, and I want to perform some function on all files beginning with a specified string, which may match tens of thousands of files. I have tried ls mystring* but this returns with the bash error ‘Too many arguments’. My next plan was to use find … Read more
I have a file with about 1000 lines. I want the part of my file after the line which matches my grep statement. That is: cat file | grep ‘TERMINATE’ # It is found on line 534 So, I want the file from line 535 to line 1000 for further processing. How can I do … Read more
What’s the simplest way to get an environment variable from a docker container that has not been declared in the Dockerfile? For instance, an environment variable that has been set through some docker exec container /bin/bash session? I can do docker exec container env | grep ENV_VAR, but I would prefer something that just returns … Read more
Closed. This question is off-topic. It is not currently accepting answers. Want to improve this question? Update the question so it’s on-topic for Stack Overflow. Closed 10 years ago. Improve this question The default shell in Mac OS X is bash, which I’m generally happy to be using. I just take it for granted. It … Read more
I am using rm within a BASH script to delete many files. Sometimes the files are not present, so it reports many errors. I do not need this message. I have searched the man page for a command to make rm quiet, but the only option I found is -f, which from the description, “ignore … Read more
I want a way to search in a given text. For that, I use grep: grep -i “my_regex” That works. But given the data like this: This is the test data This is the error data as follows . . . . . . . . . . . . . . . . . … Read more
I want to write a Bash script to process text, which might require a while loop. For example, a while loop in C: int done = 0; while(1) { … if(done) break; } I want to write a Bash script equivalent to that. But what I usually used and as all the classic examples I … Read more
This question already has answers here: Using dollar sign in shell scripting (1 answer) How do I set a variable to the output of a command in Bash? (14 answers) Closed last year. I’m trying to assign the output of cURL into a variable like so: #!/bin/sh $IP=`curl automation.whatismyip.com/n09230945.asp` echo $IP sed s/IP/$IP/ nsupdate.txt | … Read more
Is there a way to effectively do this in bash: /my/bash/script < echo ‘This string will be sent to stdin.’ I’m aware that I could pipe the output from the echo such as this: echo ‘This string will be piped to stdin.’ | /my/bash/script 6 Answers 6
