Recent questions tagged Bash

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bash - Set screen-title from shellscript

Is it possible to set the Screen Title using a shell script? I thought about something like sending the key ... didn't find the answer. See Question&Answers more detail:os...

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

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928 views

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bash - Referring to a file relative to executing script

In a bash script I'm writing, I use source to include the variable defined in a configuration file. The ... script without invoking cd? 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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846 views

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bash - Creating multiple files with content from shell

New to scripting. How can I write code to create multiple files (a.txt, b.txt, ... , z.txt)? 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 - access host's ssh tunnel from docker container

Using ubuntu tusty, there is a service running on a remote machine, that I can access via port forwarding ... Via bash, preferably. 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

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bash - Check if string is neither empty nor space in shell script

I am trying to run the following shell script which is supposed to check if a string is neither space nor empty. ... Str2 is not null or space See Question&Answers more detail:os...

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

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859 views

1 answer

bash - How to concatenate stdin and a string?

How to I concatenate stdin to a string, like this? echo "input" | COMMAND "string" and get inputstring 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 - Multiline syntax for piping a heredoc; is this portable?

I'm familiar with this syntax: cmd1 << EOF | cmd2 text EOF but just discovered that bash allows me to write ... very odd syntax. Is it portable? See Question&Answers more detail:os...

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

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891 views

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bash - Why sudo cat gives a Permission denied but sudo vim works fine?

I am trying to automate the addition of a repository source in my arch's pacman.conf file but using the ... with Permission denied as well) 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 - Exit zsh, but leave running jobs open?

Just switched from bash to zsh. In bash, background tasks continue running when the shell exits. For example here ... behavior here like bash's? See Question&Answers more detail:os...

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

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926 views

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bash - How to check if the docker engine and a docker container are running?

In a script, I need to check: a) Is the docker engine running? b) Given a container name, is that ... others as "check docker container"] 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 - Linux why can't I pipe find result to rm?

sorry if this is a noobie question but I can't find a good answer. To find then remove something I can ... stdin and command line. 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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832 views

1 answer

bash - How to quickly find all git repos under a directory

The following bash script is slow when scanning for .git directories because it looks at every directory. If I ... repo1 dirA dirB dirC repo1 See Question&Answers more detail:os...

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

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815 views

1 answer

bash - How to use patterns in a case statement?

The man page says that case statements use "filename expansion pattern matching". I usually want to have short names ... but it doesn't work. See Question&Answers more detail:os...

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

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903 views

1 answer

bash - Linux: compute a single hash for a given folder & contents?

Surely there must be a way to do this easily! I've tried the Linux command-line apps such as sha1sum and ... sitting in the same root folder. See Question&Answers more detail:os...

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

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908 views

1 answer

bash - How to get the last character of a string in a shell?

I have written the following lines to get the last character of a string: str=$1 i=$((${#str}-1)) ... lists the files in the current folder. See Question&Answers more detail:os...

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

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932 views

1 answer

bash - Sort uniq IP address in from Apache log

I'm trying to extract IP addresses from my apache log, count them, and sort them. And for whatever reason, the ... t change anything. Any hint ? See Question&Answers more detail:os...

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

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925 views

1 answer

bash - How to add include and lib paths to configure/make cycle?

I need a place to install libraries in a linux box I have no su access to. I'm using ~/local[/bin,/lib,/ ... bashrc but it doesn't seem to work. See Question&Answers more detail:os...

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

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813 views

1 answer

bash - Open files in existing Gvim in multiple (new) tabs

I have put some aliases in my .bashrc to open a group of project files in gvim, each in their own tab: ... to do this from the command line? See Question&Answers more detail:os...

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

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787 views

1 answer

bash - Find files containing a given text

In bash I want to return file name (and the path to the file) for every file of type .php|.html|.js ... "setcookie" How would I do that? See Question&Answers more detail:os...

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

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772 views

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bash - Writing outputs to log file and console

In Unix shell, I have a env file (env file defines the parameters required for running the user script ... without removing the above codes? See Question&Answers more detail:os...

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

0 votes

875 views

1 answer

bash - How can I use ":" as an AWK field separator?

Given the following command, echo "1: " | awk '/1/ -F ":" {print $1}' why does AWK output: 1: ? See Question&Answers more detail:os...

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

0 votes

998 views

1 answer

bash - Select unique or distinct values from a list in UNIX shell script

I have a ksh script that returns a long list of values, newline separated, and I want to see only the unique/ ... list like: tar gz java class See Question&Answers more detail:os...

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

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844 views

1 answer

bash - How do I find all of the symlinks in a directory tree?

I'm trying to find all of the symlinks within a directory tree for my website. I know that I can use ... I get this to check subdirectories? See Question&Answers more detail:os...

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

0 votes

785 views

1 answer

bash - Why is whitespace sometimes needed around metacharacters?

A few months ago I tattooed a fork bomb on my arm, and I skipped the whitespaces, because I think it looks ... be able to parse 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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973 views

1 answer

bash - Execute command in a variable don't execute the latter part of a pipe

I have found that the command expanded from variable won't run the latter parts in a pipe. For example, as following ... bash version is 4.3.48. See Question&Answers more detail:os...

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

0 votes

865 views

1 answer

bash - process data from text file and convert into csv

In our organization, every month a few jobs will run and collect data on server level and it will find what ... approach to handle this issue. See Question&Answers more detail:os...

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

0 votes

936 views

1 answer

bash - Permission denied when logging on /var/log from a php script

I found my crontab scripts do not work as expected because they cannot write on /var/log. I tried executing command ... with sudo as a test. See Question&Answers more detail:os...

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

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943 views

1 answer

bash - Option not recognized

I'm trying to use a case statement to determine if I have a legal command. It looks something like this: ... What am I doing wrong here? See Question&Answers more detail:os...

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

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