User Weijun Zhou

29 votes

2 answers

4k views

What is the difference between `a[bc]d` (brackets) and `a{b,c}d` (braces)?

asked Apr 27, 2019 at 17:35

18 votes

5 answers

7k views

What are some cases that the number of spaces do matter in bash (or other shell) scripts

asked Dec 29, 2017 at 2:41

16 votes

2 answers

5k views

How are double quotation marks in bash matched (paired)?

asked Feb 4, 2018 at 0:49

13 votes

1 answer

770 views

Why are spaces not needed around some string comparison operators in conditional expressions in bash?

asked Apr 1 at 8:53

11 votes

3 answers

7k views

Perform sed operations on given line numbers

asked Jan 15, 2018 at 16:37

9 votes

2 answers

2k views

How to find out the version number of `dash` without resorting to package management systems?

asked Jan 13, 2018 at 8:04

9 votes

4 answers

716 views

Where are the commands available in the man page window documented, and are these commands system-dependent?

asked Dec 7, 2017 at 11:42

5 votes

1 answer

1k views

Interrupt shell command line expansion

asked Mar 13, 2018 at 3:23

4 votes

2 answers

1k views

Why is `sed` no op much faster than `awk` in this case

asked Mar 17, 2019 at 22:49

3 votes

2 answers

2k views

Pipeline as parallel command

asked Dec 8, 2017 at 21:31

3 votes

1 answer

848 views

When is apt prompting for user confirmation and if it does so, when does it default to "yes"

asked Jan 4, 2018 at 2:35

1 vote

2 answers

677 views

Run command from history with parameters

asked Jan 5, 2018 at 16:03

1 vote

1 answer

777 views

Different behavior using tab completion from executing `ls`

asked Jan 21, 2018 at 19:39

1 vote

1 answer

631 views

Modify bash history from inside subshell in an interactive session

asked Apr 21, 2019 at 11:18

1 vote

1 answer

160 views

How to properly sandbox a program that may hang the computer

asked Mar 3, 2018 at 21:46

0 votes

1 answer

427 views

Relationship between the multiple possible configuration of domain name servers

asked Jun 8, 2018 at 6:51

0 votes

2 answers

176 views

Recursively copying a folder to an empty subfolder

asked Apr 23, 2019 at 5:34

0 votes

1 answer

173 views

Make a `ln -s` that checks for broken symbolic links

asked Apr 27, 2019 at 1:59

0 votes

1 answer

2k views

How to use grep to get the matching part only, without introducing extra newlines

asked Dec 7, 2017 at 2:24

0 votes

1 answer

667 views

How to match either `[` or `]` (brackets) with regular expression?

asked May 2, 2019 at 4:23

Stack Exchange Network

20 Questions

What is the difference between `a[bc]d` (brackets) and `a{b,c}d` (braces)?

What are some cases that the number of spaces do matter in bash (or other shell) scripts

How are double quotation marks in bash matched (paired)?

Why are spaces not needed around some string comparison operators in conditional expressions in bash?

Perform sed operations on given line numbers

How to find out the version number of `dash` without resorting to package management systems?

Where are the commands available in the man page window documented, and are these commands system-dependent?

Interrupt shell command line expansion

Why is `sed` no op much faster than `awk` in this case

Pipeline as parallel command

When is apt prompting for user confirmation and if it does so, when does it default to "yes"

Run command from history with parameters

Different behavior using tab completion from executing `ls`

Modify bash history from inside subshell in an interactive session

How to properly sandbox a program that may hang the computer

Relationship between the multiple possible configuration of domain name servers

Recursively copying a folder to an empty subfolder

Make a `ln -s` that checks for broken symbolic links

How to use grep to get the matching part only, without introducing extra newlines

How to match either `[` or `]` (brackets) with regular expression?