Hottest Questions This Month

28

votes

11

answers

6k

views

Why doesn't shell automatically fix “useless use of cat”? [closed]

modified Apr 22 at 17:45 Kusalananda♦ 143k

12

votes

6

answers

3k

views

How to compare two different files line by line in unix?

text-processing awk diff

answered 11 hours ago Praveen Kumar BS 1,806

14

votes

4

answers

3k

views

If the heap is zero-initialized for security, then why is the stack merely uninitialized?

linux security memory

modified Mar 30 at 6:13 Jacob Jones 28

12

votes

4

answers

2k

views

Why doesn't using multiple commands with a || or && conditional work?

shell-script arguments

modified Apr 18 at 15:18 Kusalananda♦ 143k

26

votes

2

answers

3k

views

What is /etc/mtab in Linux?

linux fstab

modified 2 days ago JdeBP 38.9k

17

votes

1

answer

2k

views

String `!23` is replaced with `docker` in command line

bash

modified Apr 16 at 15:17 Stephen Kitt 183k

16

votes

3

answers

1k

views

What is the difference between 'contrib' and 'non-free' packages repositories?

debian repository debian-policy

modified Apr 2 at 18:55 Malvin Butterfinger 121

13

votes

6

answers

693

views

Only print output after finding pattern

echo printf

modified Mar 29 at 2:53 wjandrea 584

12

votes

3

answers

2k

views

What difference does it make matching a word with/without a trailing whitespace?

sed whitespace

modified Apr 1 at 15:49 Kusalananda♦ 143k

26

votes

1

answer

879

views

Finding files for which a command fails

files scripting find exit-status

modified Apr 14 at 13:21 Jeff Schaller♦ 45.4k

18

votes

3

answers

1k

views

What do the dots in this tr command do: tr …A-Z A-ZA-Z <<< “JVPQBOV” (with 13 dots)

tr

modified Apr 6 at 10:33 user7761803 141

21

votes

2

answers

1k

views

Why does tar appear to skip file contents when output file is /dev/null?

tar null

answered Apr 14 at 9:51 Guntram Blohm 294

4

votes

5

answers

2k

views

Is grep documentation about ignoring case wrong, since it doesn't ignore case in filenames?

grep documentation

modified Apr 19 at 9:56 Kusalananda♦ 143k

9

votes

1

answer

1k

views

How do I automatically answer y in bash script?

bash

modified Apr 14 at 9:38 Rui F Ribeiro 42.4k

5

votes

6

answers

530

views

How to delete every two lines after 3rd lines in a file contains very large number of lines? [closed]

bash shell awk sed

modified Mar 31 at 4:25 Prvt_Yadv 3,366

20

votes

1

answer

2k

views

What does 'script /dev/null' do?

terminal gnu-screen su pty

modified Apr 9 at 11:47 törzsmókus 115

17

votes

1

answer

2k

views

Why don't Unix/Linux systems traverse through directories until they find the required version of a linked library?

libraries dynamic-linking shared-library ld

modified Apr 9 at 11:23 Stephen Kitt 183k

6

votes

8

answers

752

views

Delete nth line (when counted from the bottom)

awk sed perl

modified Apr 18 at 9:17 Swapnil Dhule 31

7

votes

3

answers

837

views

Echoing a tail command produces unexpected output?

bash sudo cron echo tail

modified Apr 16 at 12:43 Jeff Schaller♦ 45.4k

15

votes

2

answers

1k

views

Understanding piped commands in Unix/Linux

pipe terminology

modified Apr 22 at 17:15 G-Man 13.9k

8

votes

3

answers

411

views

Replacing matching entries in one column of a file by another column from a different file

awk

answered Apr 7 at 13:47 Praveen Kumar BS 1,806

10

votes

4

answers

1k

views

What's the difference between 'rename' and 'mv'?

rename mv

modified 2 days ago ilkkachu 63.6k

11

votes

2

answers

359

views

Is it possible to search for a directory/file combination?

find

modified Apr 7 at 14:38 Rui F Ribeiro 42.4k

9

votes

6

answers

571

views

Prepend last line of stdin to entire stdin

bash

modified Apr 1 at 10:41 Jonah 469

10

votes

4

answers

858

views

Prevent a directory in /tmp from being deleted

tmp

answered Apr 7 at 22:59 viraptor 202

6

votes

2

answers

776

views

How to install cross-compiler on Ubuntu 18.04?

ubuntu cross-compilation

modified Apr 2 at 11:13 Philip Couling 2,616

4

votes

4

answers

498

views

extract characters between two commas?

text-processing awk

answered Apr 9 at 5:22 Rakesh Sharma 26

11

votes

2

answers

401

views

Delete all lines which don't have n characters before delimiter

text-processing sed grep text-formatting

answered Apr 10 at 20:03 Digital Trauma 6,142

6

votes

3

answers

673

views

Using “tail” to follow a file without displaying the most recent lines

linux command-line tail

modified Apr 3 at 18:27 l0b0 28.9k

9

votes

1

answer

1k

views

Download, install and reboot computer at night if needed

ubuntu scripting upgrade reboot

modified Apr 7 at 20:04 Stephen Kitt 183k

5

votes

3

answers

460

views

Which is the best way to check return result?

bash shell-script

modified Apr 3 at 17:11 rexkogitans 405

7

votes

1

answer

284

views

Is it possible to replace duplicates of a character with one character using tr

linux text-processing replace tr

modified Mar 30 at 20:37 Stéphane Chazelas 316k

3

votes

2

answers

695

views

Merge two greps into single one

grep regular-expression

modified Apr 12 at 6:14 muru 38.1k

5

votes

3

answers

513

views

How to display lines in a file like ls displays files in a directory? [closed]

files ls cat

modified Apr 12 at 14:39 Kusalananda♦ 143k

1

vote

4

answers

500

views

Why use cat to view a file? [closed]

text-processing cat less

modified Apr 10 at 7:24 Fólkvangr 340

7

votes

1

answer

374

views

Sorting numerically

sort

modified Apr 15 at 19:34 Stéphane Chazelas 316k

4

votes

2

answers

333

views

porting install scripts : can rpm replace apt?

shell-script apt yum rpm software-distribution

modified Apr 17 at 8:16 Stephen Kitt 183k

7

votes

2

answers

524

views

What is the use of option -o in the useradd command?

linux useradd

modified Apr 10 at 8:00 Stephen Kitt 183k

6

votes

1

answer

237

views

Escape a mm/dd/YY backup date in a file name

shell filenames date escape-characters slash

modified Mar 28 at 16:52 Stéphane Chazelas 316k

6

votes

2

answers

715

views

How to produce a PS1 prompt in bash or ksh93 similar to tcsh

bash ksh prompt tcsh

modified 2 days ago mosvy 10.8k

6

votes

2

answers

572

views

Loop in macOS not working

shell-script shell osx brace-expansion

modified Apr 2 at 8:02 Kusalananda♦ 143k

8

votes

3

answers

369

views

How can I list files in reverse time order by a command and pass them as arguments to another command?

bash files date arguments

modified Apr 22 at 13:54 Jeff Schaller♦ 45.4k

7

votes

2

answers

185

views

different output for groups and groups USERNAME after adding a username to a group

command-line users group

modified Apr 13 at 1:20 Jeff Schaller♦ 45.4k

6

votes

1

answer

377

views

Why doesn't mkfifo with a mode of 1755 grant read permissions and sticky bit to the user?

permissions c mkfifo

modified Apr 11 at 17:21 mosvy 10.8k

3

votes

3

answers

256

views

Understanding declare in Bash

bash function shell-builtin control-flow declare

modified Apr 6 at 21:43 LL3 1,337

3

votes

2

answers

209

views

Issue with type force PATH search

bash fish shell-builtin

modified Apr 4 at 9:08 Git Gud 137

2

votes

3

answers

182

views

How to get single character after space?

linux awk sed grep cut

modified Apr 14 at 12:28 Freddy 2,192

5

votes

1

answer

575

views

Why do I get “Binary file matches” with grep -I?

grep binary

answered Apr 2 at 10:41 muru 38.1k

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