Recent questions tagged bash

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bash - How can I suppress output of grep?

When I run this command, it also prints the actual $item in the file when the grep is successful. I do not ... exist else echo does not exist fi See Question&Answers more detail:os...

asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)

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bash - Composer unable to run post install script

I'm getting the following error when trying to run a bash script in Composer post install/update hooks: > post- ... /bootstrap/ ... ... See Question&Answers more detail:os...

asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)

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bash - Shell script pass arguments with spaces

I want to pass arguments from one shell script ( say script1 ) to another. Some of the arguments contain ... mentioned argument as a whole. See Question&Answers more detail:os...

asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)

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bash - sed - regex square brackets detection in Linux

I am using Ubuntu 14.04, and I have the following statement: 192.168.2.4 [text to capture] Test: This ... with the regex tester. Thanks John See Question&Answers more detail:os...

asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)

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bash - echo $(printf ...) dropping whitespace/formatting

I was using printf to format a number in bash: $ printf -- ">>%4d " 1 >> 1 This works fine, but ... spaces removed? I have absolutely no idea. See Question&Answers more detail:os...

asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)

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bash - Passing input to an executable using Python subprocess module

I have an input file called 0.in. To get the output I do ./a.out < 0.in in the Bash Shell. Now, I have ... right method to do what I want to do? See Question&Answers more detail:os...

asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)

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bash - Unix Print Output on One Line

I am creating a Unix .bash_profile script, and I have run into a small problem. Here is a snippet of my code: ... , on Ubuntu Server 10.04 LTS. See Question&Answers more detail:os...

asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)

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bash - xcodebuild command in shell script iOS

I have a complete command to deploy the xCode project on real device. i.e xcodebuild -workspace ... concatenate the xcodebuild command See Question&Answers more detail:os...

asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)

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bash - Install everything from a `conda list` output

I have a file, conda_env.txt, resulting from saving the stdout of conda list. It has the following structure. ... how to do it correctly? See Question&Answers more detail:os...

asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)

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962 views

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bash - Why is Unix/Terminal faster than R?

I'm new to Unix, however, I have recently realized that very simple Unix commands can do very simple things to large ... for Unix and R. Why? See Question&Answers more detail:os...

asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)

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931 views

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bash - Running NuSMV on OSX

I have installed NuSMV using the readme provided, however when I try to use the NuSMV command, I get the ... so I'd appreciate any help See Question&Answers more detail:os...

asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)

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945 views

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bash - Using a variable containing spaces as a single argument

Think you have a variable that contains a string of text with spaces inbetween and you want to use that as ... else ./a_script.sh $VAR1 See Question&Answers more detail:os...

asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)

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bash - Control + , in Terminal.app

I use the shortcut C-, with the window version of emacs. (global-set-key (kbd "C-,") 'dabbrev-expand) ... shortcuts like Ctrl-<left-arrow>. See Question&Answers more detail:os...

asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)

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bash - How do I pass a range of commits to git log?

Ok I give up, I am a Bash noob. This: $ git log --no-walk --oneline 6980e6ecede8e188f434f6da669c2297f28decfe ... version 2.6.1.windows.1 See Question&Answers more detail:os...

asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)

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1.2k views

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bash - how to format a date in shell script

How can i format the date "01-SEP-2011" on "2011-09-01" format in shell script? See Question&Answers more detail:os...

asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)

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930 views

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bash - How to use the name of the file with sed in a find expression

Trying to answer Using Bash/Perl to modify files based on each file's name I ended in a point in which I ... a great solution for this. Thanks! See Question&Answers more detail:os...

asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)

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bash - Why do I get "unexpected token `;'?

I would like to run a few instances of my bash script foo.bash in background. When I write for i in {1.. ... occurs and how to fix the command? See Question&Answers more detail:os...

asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)

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1.1k views

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bash - Deleting records from a remote postgresql database using locally supplied list

I have the following logic in a bash script that works: #copy records to delete file to respective ... Any suggestions would be appreciated See Question&Answers more detail:os...

asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)

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1.2k views

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bash - how to insert ctrl+d into my linux script?

I want to make the following commands: cat > template.txt [enter in the terminal] text [Ctrl+d in the terminal ... that worked for me. Thanks. See Question&Answers more detail:os...

asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)

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bash - Exit tail upon string detection

I'm writing a barrier to stall the execution of a script until a certain keyword is logged. The script is ... exit right after it logs STOP? See Question&Answers more detail:os...

asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)

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966 views

1 answer

bash - Why is the escape of quotes lost in this regex substitution?

Why is the escaping of double quotes are lost in this case? $ cat foo.txt This is a "very good" text ... How can I preserve the escapes? See Question&Answers more detail:os...

asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)

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1.1k views

1 answer

bash - Python: can't access newly defined environment variables

I can't access my env var: import subprocess, os print os.environ.get('PATH') # Works well print os.environ. ... env var from a new terminal. See Question&Answers more detail:os...

asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)

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1.0k views

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bash - Variables value gets lost in subshell

This bash script concatenates the names for jar files to a classpath (variable CP), in the while loop the value is ... | xargs echo|tr ' ' : See Question&Answers more detail:os...

asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)

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910 views

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bash - Quotes inside a variable are ignored

I want to pass an argument to rsync from a variable like this: myopts='-e "ssh -p 1234" -a' rsync ... from the variable are completely ignored. See Question&Answers more detail:os...

asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)

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966 views

1 answer

bash - Change directory to a path specified in a file with tilde

I have a file, say: ~/cwd. The content of this file is a single line: ~/tmp I want fo cd to this (~/ ... the ~/cwd is absolute path - it works. See Question&Answers more detail:os...

asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)

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1.2k views

1 answer

bash - Extract text between two strings on different lines

I have a big email file with the following random hosts: ...... HOSTS: test-host,host2.domain.com, host3.domain.com,another ... -E "s/,s*/ /g" See Question&Answers more detail:os...

asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)

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1.2k views

1 answer

bash - unix: merge files based on column value

I have two files, that look like this: File 1 (2 columns): ID1 123 ID2 234 ID3 232 ID4 344 ... File 2 ... do this under unix/bash? Many thanks! See Question&Answers more detail:os...

asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)

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1.2k views

1 answer

bash - Docker: Cronjob is not working

I am trying to run cron job on Docker container. I have a running container (Fedora 20). I have also installed ... on this? thanks in advance. See Question&Answers more detail:os...

asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)

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