User Mike B

167 votes

7 answers

655k views

Why does find -mtime +1 only return files older than 2 days?

asked Sep 25, 2013 at 15:53

59 votes

14 answers

46k views

What's the most resource efficient way to count how many files are in a directory?

asked Sep 10, 2013 at 19:33

49 votes

4 answers

37k views

What's the difference between hard links and copied files?

asked Feb 16, 2013 at 18:06

47 votes

2 answers

87k views

What is the difference between OUTPUT and FORWARD chains in iptables?

asked Oct 17, 2013 at 23:36

37 votes

3 answers

33k views

Why are TCP/IP sockets considered "open files"?

asked Sep 24, 2014 at 22:15

36 votes

3 answers

104k views

What does || mean in bash? [duplicate]

asked Mar 16, 2015 at 18:04

31 votes

7 answers

3k views

What's the equivalent to && when writing a bash script?

asked Feb 2, 2013 at 20:15

30 votes

2 answers

75k views

Difference between >> and >\> operators?

asked Feb 10, 2013 at 23:47

25 votes

3 answers

19k views

How can I search in vim for a pattern that is NOT case sensitive?

asked Mar 24, 2015 at 17:41

21 votes

2 answers

9k views

How are ACL permissions processed and in what order do they apply to a given user action?

asked Sep 25, 2013 at 22:50

19 votes

5 answers

45k views

What is the most efficient way to move a large number of files that reside in a single directory?

asked Nov 27, 2013 at 23:35

17 votes

6 answers

34k views

How can I extract/parse a complete URL from a semi random string?

asked Mar 4, 2014 at 6:25

16 votes

4 answers

892 views

Why does ls accept duplicate switches?

asked Aug 8, 2014 at 18:33

14 votes

2 answers

29k views

When exactly does tmpwatch clear out files I place in /tmp?

asked Mar 8, 2014 at 17:30

14 votes

2 answers

71k views

What's the difference between "errors:" "dropped:" "overruns:" and "frame:" fields in ifconfig RX packets output?

asked Feb 13, 2015 at 1:45

13 votes

3 answers

9k views

Where is ACL data technically stored?

asked Oct 4, 2013 at 0:51

12 votes

4 answers

5k views

How can measure how long it takes my script to run AND include that in an email it generates?

asked Feb 7, 2015 at 1:57

12 votes

4 answers

47k views

Why is sed giving me an error about an unterminated `s'?

asked May 10, 2013 at 5:05

12 votes

1 answer

3k views

What is the significance of the dot in bash commands and how is it different from an asterisk?

asked Jan 21, 2013 at 20:53

11 votes

5 answers

10k views

What is the difference between the whatis and apropos commands?

asked Mar 24, 2013 at 16:29

10 votes

4 answers

4k views

If I type "sudo" at the beginning of a one liner, does it apply to the rest of the commands?

asked Sep 10, 2013 at 23:52

9 votes

4 answers

19k views

How can I use SED or AWK to replace placeholders in a template file with variable content that contains special characters?

asked Apr 28, 2013 at 16:10

8 votes

1 answer

25k views

What is the IPV4_FAILURE_FATAL ifcfg directive and under what scenarios would I want to use it?

asked Aug 30, 2013 at 15:23

8 votes

2 answers

33k views

Does iptables -F permanently delete all iptables rules?

asked Jan 21, 2013 at 2:45

8 votes

4 answers

9k views

Why is the theoretical RAM limit for RHEL 6 128 TB and how is this determined?

asked Jan 12, 2013 at 20:55

8 votes

1 answer

25k views

How can I manually reset RX / TX counters in ifconfig output without impacting data delivery?

asked Oct 24, 2014 at 18:13

8 votes

4 answers

20k views

How can I check to see if the /tmp directory on my CentOS 5.x system is mounted on tmpfs?

asked Mar 6, 2014 at 17:47

8 votes

2 answers

9k views

What's the most efficient way to grep for two completely separate things and assign the values to separate variables?

asked Mar 4, 2014 at 2:06

7 votes

3 answers

18k views

Do I need to encapsulate awk variables in quotes in order to sanitize them?

asked Feb 6, 2014 at 6:49

7 votes

3 answers

7k views

What does "if !" mean?

asked Oct 18, 2014 at 2:29

Stack Exchange Network

87 Questions

Why does find -mtime +1 only return files older than 2 days?

What's the most resource efficient way to count how many files are in a directory?

What's the difference between hard links and copied files?

What is the difference between OUTPUT and FORWARD chains in iptables?

Why are TCP/IP sockets considered "open files"?

What does || mean in bash? [duplicate]

What's the equivalent to && when writing a bash script?

Difference between >> and >\> operators?

How can I search in vim for a pattern that is NOT case sensitive?

How are ACL permissions processed and in what order do they apply to a given user action?

What is the most efficient way to move a large number of files that reside in a single directory?

How can I extract/parse a complete URL from a semi random string?

Why does ls accept duplicate switches?

When exactly does tmpwatch clear out files I place in /tmp?

What's the difference between "errors:" "dropped:" "overruns:" and "frame:" fields in ifconfig RX packets output?

Where is ACL data technically stored?

How can measure how long it takes my script to run AND include that in an email it generates?

Why is sed giving me an error about an unterminated `s'?

What is the significance of the dot in bash commands and how is it different from an asterisk?

What is the difference between the whatis and apropos commands?

If I type "sudo" at the beginning of a one liner, does it apply to the rest of the commands?

How can I use SED or AWK to replace placeholders in a template file with variable content that contains special characters?

What is the IPV4_FAILURE_FATAL ifcfg directive and under what scenarios would I want to use it?

Does iptables -F permanently delete all iptables rules?

Why is the theoretical RAM limit for RHEL 6 128 TB and how is this determined?

How can I manually reset RX / TX counters in ifconfig output without impacting data delivery?

How can I check to see if the /tmp directory on my CentOS 5.x system is mounted on tmpfs?

What's the most efficient way to grep for two completely separate things and assign the values to separate variables?

Do I need to encapsulate awk variables in quotes in order to sanitize them?

What does "if !" mean?