unix

问题 I am trying to find out if there is a way to get details of blkid of an unmounted volume, through some native golang library. I am particularly interested in fstype of the volume 回答1: I don't think there is a native library - I couldn't find one. I think you've got 3 choices Shell out to the blkid utility Write a cgo interface to libblkid Trawl through the libblkid source and re-implement it in go 1 is very easy. 2 is harder. 3 might be easy depending on exactly which feature of blkid you

问题 I am trying to find out if there is a way to get details of blkid of an unmounted volume, through some native golang library. I am particularly interested in fstype of the volume 回答1: I don't think there is a native library - I couldn't find one. I think you've got 3 choices Shell out to the blkid utility Write a cgo interface to libblkid Trawl through the libblkid source and re-implement it in go 1 is very easy. 2 is harder. 3 might be easy depending on exactly which feature of blkid you

问题 I'm trying to import data from a MySQL Database to an Excel 365 (32 bit) Workbook. This is a DB I can link to without any issues : This is the DB I can't link to : I've downloaded the following connector : MySQL Connector Net 6.10.6 I suspect that this is not the correct connector for the second DB. The error is this : [MySQL: Unable to connect to any of the specified MySQL hosts.] Could someone point me to the beginning of a solution ? I've also tried to connect via VBA but I also get an

问题 I'm trying to import data from a MySQL Database to an Excel 365 (32 bit) Workbook. This is a DB I can link to without any issues : This is the DB I can't link to : I've downloaded the following connector : MySQL Connector Net 6.10.6 I suspect that this is not the correct connector for the second DB. The error is this : [MySQL: Unable to connect to any of the specified MySQL hosts.] Could someone point me to the beginning of a solution ? I've also tried to connect via VBA but I also get an

问题 What is the difference between find . vs find * . When i am trying to search for a file in current directory i.e. which was modified not more than 20 days ,i fired below query find . -maxdepth 0 -mtime -20 The above command gives no output but find * -maxdepth 0 -mtime -20 gives me the output that is required.Why is this happening i am searching in current directory only and . also means current directory 回答1: . means "start with the current directory". A depth of 0 can only be . . * means

问题 I am aware of another question that is quite similar, but for some reason I'm still having problems. I have a GC log that I'm trying to trim out the Tenured section enclosed in [] . 63.544: [GC 63.544: [DefNew: 575K->63K(576K), 0.0017902 secs]63.546: [Tenured: 1416K->1065K(1536K), 0.0492621 secs] 1922K->1065K(2112K), 0.0513331 secs] I apply s/\[Tenured:.*\]// And quite expectantly, the result is trimmed greedily through the remainder of the line: 63.544: [GC 63.544: [DefNew: 575K->63K(576K),

问题 I am aware of another question that is quite similar, but for some reason I'm still having problems. I have a GC log that I'm trying to trim out the Tenured section enclosed in [] . 63.544: [GC 63.544: [DefNew: 575K->63K(576K), 0.0017902 secs]63.546: [Tenured: 1416K->1065K(1536K), 0.0492621 secs] 1922K->1065K(2112K), 0.0513331 secs] I apply s/\[Tenured:.*\]// And quite expectantly, the result is trimmed greedily through the remainder of the line: 63.544: [GC 63.544: [DefNew: 575K->63K(576K),

问题 I have a text in a file file.txt like this xxxxxxxxxxxxxxx xxxxxxxxxxxxxxx a b c // delimited by tab xxxxxxxxxxxxxxx xxxxxxxxxxxxxxx I know using sed I can find and replace text in a file. If a line starts with a b(seperated by a tab) I need to replace it with d e f. So the above file will be xxxxxxxxxxxxxxx xxxxxxxxxxxxxxx d e f // delimited by tab xxxxxxxxxxxxxxx xxxxxxxxxxxxxxx I can do this to find and replace, I want only those instances where the line starts with a b and replace the

问题 This question already has answers here : Dynamic variable names in Bash (13 answers) how to use variable variable names in bash script [duplicate] (1 answer) Closed 3 years ago . How do I assign a value to variable that has a variable in its name? var1="file" var2_$var1="folder" The code above gives me the error -bash: var2_file=folder: command not found . I was curious to know how to assign to a variable with another variable in its name. Version of Bash is "GNU bash, version 4.1.2" 回答1:

问题 This question already has answers here : Dynamic variable names in Bash (13 answers) how to use variable variable names in bash script [duplicate] (1 answer) Closed 3 years ago . How do I assign a value to variable that has a variable in its name? var1="file" var2_$var1="folder" The code above gives me the error -bash: var2_file=folder: command not found . I was curious to know how to assign to a variable with another variable in its name. Version of Bash is "GNU bash, version 4.1.2" 回答1: