bash
purpose of read rev in this bash oneliner
So, the following bash oneliner will generate similar output as git log git rev-list --reverse HEAD | while read rev; do git log -1 $rev; done[详细]
2023-04-10 23:31 分类：问答bash coproc and leftover coproc output
I need to read some configuration data into environment variables in a bash script. The \"obvious\" (but incorrect) pattern is:[详细]
2023-04-10 21:32 分类：问答Grep penultimate line
Like the title says, how can I filter with grep (or similar bash tool) the line-before-the-last-line of a (variable length) file?[详细]
2023-04-10 21:24 分类：问答script working manually but not via crontab?
Wondered if anyone had any idea why the following problem is occurring, or had any tips where to look…I can run the shell script manually in ssh, but if I set it up to run in crontab i get the proble[详细]
2023-04-10 20:38 分类：问答Bash file system directory test trickery
Assuming that the folders exist in the script below, can someone tell my why this is not working? I escape the spaces extra for the test to work but somehow it does not like it with no error...[详细]
2023-04-10 20:22 分类：问答Grep command being reversed by special character?
I am trying to write a bash script which will search through a txt file for a string from another txt file which is stored within a variable.However the string has a number of special characters in it[详细]
2023-04-10 18:20 分类：问答How to remotely edit a line containing double quotes and variables using sed across ssh?
I have a sed command that works perfectly if I run it locally on Ubuntu or our embedded client Arago:[详细]
2023-04-10 17:21 分类：问答Can I pipe part of my bash scripts output to a file? Can I pipe to a file and stdout?
I am pretty sure I\'ve seen this done before, but I can\'t seem to find it by google. for file in $mydir/*[详细]
2023-04-10 16:55 分类：问答How do I script a "yes" response for installing programs?
I work with Amazon Linux instances and I have a couple scripts to populate data and install all the programs I wor开发者_运维技巧k with, but a couple of the programs ask:[详细]
2023-04-10 16:44 分类：问答BASH: Is there a simple way to check whether a string is a valid SHA-1 (or MD5) hash?
It\'s all in the title. An alternative way to phase the problem is: in BASH, what is a concise way of checking whether a string is a sequence开发者_如何学编程 of 40 (or 32) characters in the ranges [[详细]
2023-04-10 16:14 分类：问答
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