Recent questions tagged bash

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bash - How to get total size of folders with find and du?

I'm trying to get the size of the directories named "bak" with find and du. I do that : find -name bak - ... . Anyway to get them ? 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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857 views

1 answer

bash - How to convert strings like "19-FEB-12" to epoch date in UNIX

In UNIX how to convert to epoch milliseconds date strings like: 19-FEB-12 16-FEB-12 05-AUG-09 I need this ... the current time on the server. See Question&Answers more detail:os...

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

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818 views

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bash - Compilers for shell scripts

Do you know if there's any tool for compiling bash scripts? It doesn't matter if that tool is just a ... Are there any other similar tools? See Question&Answers more detail:os...

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

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684 views

1 answer

bash - Get the newest file based on timestamp

I am new to shell scripting so i need some help need how to go about with this problem. I have a ... the rest to a different directory. See Question&Answers more detail:os...

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

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768 views

1 answer

bash - What is the difference between "$(cat file)", "$(<file)" and "read ... < file" for files with one line?

I have an input file that contains only one line: $ cat input foo bar I want to use this line in my script ... AT_FDCWD, "input", O_RDONLY) = 3 See Question&Answers more detail:os...

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

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785 views

1 answer

bash - What is the difference between "$(cat file)", "$(<file)" and "read ... < file" for files with one line?

I have an input file that contains only one line: $ cat input foo bar I want to use this line in my script ... AT_FDCWD, "input", O_RDONLY) = 3 See Question&Answers more detail:os...

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

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776 views

1 answer

bash - What is the difference between "$(cat file)", "$(<file)" and "read ... < file" for files with one line?

I have an input file that contains only one line: $ cat input foo bar I want to use this line in my script ... AT_FDCWD, "input", O_RDONLY) = 3 See Question&Answers more detail:os...

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

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879 views

1 answer

bash - Compilers for shell scripts

Do you know if there's any tool for compiling bash scripts? It doesn't matter if that tool is just a ... Are there any other similar tools? See Question&Answers more detail:os...

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

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802 views

1 answer

bash - Get the newest file based on timestamp

I am new to shell scripting so i need some help need how to go about with this problem. I have a ... the rest to a different directory. See Question&Answers more detail:os...

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

0 votes

667 views

1 answer

bash - What is the difference between "$(cat file)", "$(<file)" and "read ... < file" for files with one line?

I have an input file that contains only one line: $ cat input foo bar I want to use this line in my script ... AT_FDCWD, "input", O_RDONLY) = 3 See Question&Answers more detail:os...

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

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836 views

1 answer

bash - Get exit code of process substitution with pipe into while loop

The following script calls another program reading its output in a while loop (see Bash - How to pipe input ... the loop was executed properly? 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 - Passing multiple distinct arrays to a shell function

Because shells other than ksh do not support pass-by-reference, how can multiple arrays be passed into a ... element (no reserved sigils)? See Question&Answers more detail:os...

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

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790 views

1 answer

bash - Detect empty command

Consider this PS1 PS1=' ${_:+$? }$ ' Here is the result of a few commands $ [ 2 = 2 ] 0 $ [ 2 = 3 ] ... go away, like line 1. How can I do this? See Question&Answers more detail:os...

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

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1.8k views

1 answer

bash - Starting container process caused "exec: "/bin/sh": stat /bin/sh: no such file or directory": unknown

I want to understand how CMD and ENTRYPOINT works. So, I just created a very simple Dockerfile FROM scratch CMD ... please help me about error? See Question&Answers more detail:os...

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

0 votes

928 views

1 answer

bash - How to skip row when importing bad MySQL dump

Given bad mysqldump that causes error on import: namtar backups # mysql -p < 2010-12-01.sql Enter password: ... but it's not very convinient) 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 - How can I check if 'grep' doesn't have any output?

I need to check if the recipient username is in file /etc/passwd which contains all the users in my class ... "<"$attachment" done press_enter } See Question&Answers more detail:os...

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

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933 views

1 answer

bash - What are the error exit values for diff?

On the diff man-page I've found these exit values: 0 No differences were found. 1 Differences were found. ... above 1 for different errors? See Question&Answers more detail:os...

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

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809 views

1 answer

bash - Linux Combine two files by column

I am trying to combine two files as below (Intersection) ID Name Telephone 1 John 011 2 Sam 013 3 Jena 014 4 ... you guys have any idea? 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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1.0k views

1 answer

bash - Is it possible to USB tether an android device using adb through the terminal?

I'm setting up some tests and it will require a decent number of phones to be usb tethered and ... anything fruitful. Any suggestions? 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 - Capitalize strings in sed or awk

I have three types of strings that I'd like to capitalize in a bash script. I figured sed/awk would be ... e.g. my_fish_tacos -> My_Fish_Tacos See Question&Answers more detail:os...

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

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749 views

1 answer

bash - How to zgrep the last line of a gz file without tail

Here is my problem, I have a set of big gz log files, the very first info in the line is a datetime text, e.g ... :50:00 and closed at 14:10:00. See Question&Answers more detail:os...

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

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974 views

1 answer

bash - How to see contents of Hive orc files in linux

Is there a way to see the contents of an orc file that hive 0.11 and above use. I usually cat gz ... something similar to this for orc files. See Question&Answers more detail:os...

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

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814 views

1 answer

bash - How to determine the default location for openssl.cnf?

Background I'm writing a bash script that will use openssl to generate a certificate signing request with X509v3 ... openssl as a default. See Question&Answers more detail:os...

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

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934 views

1 answer

bash - How can I use a shebang in a PowerShell script?

I have several PowerShell scripts that I'd like to invoke directly as a command from a Bash shell in Cygwin ... Linux/macOS users finding this. 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 - Add leading zeroes to awk variable

I have the following awk command within a "for" loop in bash: awk -v pdb="$pdb" 'BEGIN {file = 1; ... ways. Help would be much 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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976 views

1 answer

bash - How to get the first column of every line from a CSV file?

How do get the first column of every line in an input CSV file and output to a new file? I am thinking using awk but not sure how. See Question&Answers more detail:os...

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

0 votes

980 views

1 answer

bash - Redirecting stdout/stderr to multiple files

I was wondering how to redirect stderr to multiple outputs. I tried it with this script, but I couldn't get ... be much appreciated. Thank you. See Question&Answers more detail:os...

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

0 votes

1.1k views

1 answer

bash - Remove first directory components from path of file

I need to remove one directory (the leftmost) from variables in Bash. I found ways how can I remove all the ... and project/docs/README, ... See Question&Answers more detail:os...

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

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