ls -l | grep -e -x -e -dr | wc -l 

长串 过滤文件和dirs 计算过滤后的行号

根据上面给出的回复和评论，我列出了下面的文件计数清单。特别是它结合了@Greg Bell提供的解决方案和@Arch Stanton的评论 & @Schneems

计数当前目录和子目录中的所有文件

function countit { find . -maxdepth 1000000 -type d -print0 | while IFS= read -r -d '' i ; do file_count=$(find "$i" -type f | wc -l) ; echo "$file_count: $i" ; done }; countit | sort -n -r >file-count.txt

计数当前目录及子目录中所有给定名称的文件

function countit { find . -maxdepth 1000000 -type d -print0 | while IFS= read -r -d '' i ; do file_count=$(find "$i" -type f | grep <enter_filename_here> | wc -l) ; echo "$file_count: $i" ; done }; countit | sort -n -r >file-with-name-count.txt

要确定当前目录中有多少文件，输入ls -1 | wc -l。这使用wc对ls -1输出中的行数(-l)进行计数。它不计算dotfiles。请注意，我在以前版本的HOWTO中使用的ls -l(这是一个“L”而不是前面例子中的“1”)实际上会给你一个比实际计数大1的文件计数。这一点要感谢内贾德。

如果你想只计算文件而不包括符号链接(这只是一个你可以做的其他事情的例子)，你可以使用ls -l | grep -v ^l | wc -l(这是一个“l”而不是“1”，我们想要一个“长”列表)。Grep检查以“l”开头的任何行(表示链接)，并丢弃该行(-v)。

相对速度:“ls -1 /usr/bin/ | wc -l”在未加载的486SX25上大约需要1.03秒(在此机器上/usr/bin/有355个文件)。“ls -l /usr/bin/ | grep -v ^l | wc -l”大约耗时1.19秒。

来源:http://www.tldp.org/HOWTO/Bash-Prompt-HOWTO/x700.html

对于当前目录:

find -type f | wc -l

对于名称中有空格的目录…(基于上面的各种答案)—递归打印目录名称和文件数量:

find . -mindepth 1 -type d -print0 | while IFS= read -r -d '' i ; do echo -n $i": " ; ls -p "$i" | grep -v / | wc -l ; done

示例(为便于阅读而格式化):

pwd
  /mnt/Vancouver/Programming/scripts/claws/corpus

ls -l
  total 8
  drwxr-xr-x 2 victoria victoria 4096 Mar 28 15:02 'Catabolism - Autophagy; Phagosomes; Mitophagy'
  drwxr-xr-x 3 victoria victoria 4096 Mar 29 16:04 'Catabolism - Lysosomes'

ls 'Catabolism - Autophagy; Phagosomes; Mitophagy'/ | wc -l
  138

## 2 dir (one with 28 files; other with 1 file):
ls 'Catabolism - Lysosomes'/ | wc -l
  29

使用tree可以更好地可视化目录结构:

tree -L 3 -F .
  .
  ├── Catabolism - Autophagy; Phagosomes; Mitophagy/
  │   ├── 1
  │   ├── 10
  │   ├── [ ... SNIP! (138 files, total) ... ]
  │   ├── 98
  │   └── 99
  └── Catabolism - Lysosomes/
      ├── 1
      ├── 10
      ├── [ ... SNIP! (28 files, total) ... ]
      ├── 8
      ├── 9
      └── aaa/
          └── bbb

  3 directories, 167 files

man find | grep mindep
  -mindepth levels
    Do not apply any tests or actions at levels less than levels
    (a non-negative integer).  -mindepth 1 means process all files
    except the starting-points.

Ls -p | grep -v /(下面使用)来自https://unix.stackexchange.com/questions/48492/list-only-regular-files-but-not-directories-in-current-directory的答案2

find . -mindepth 1 -type d -print0 | while IFS= read -r -d '' i ; do echo -n $i": " ; ls -p "$i" | grep -v / | wc -l ; done
./Catabolism - Autophagy; Phagosomes; Mitophagy: 138
./Catabolism - Lysosomes: 28
./Catabolism - Lysosomes/aaa: 1

应用程序:我想找到几百个目录中的最大文件数量(所有深度= 1)[下面的输出再次格式化的可读性]:

date; pwd
    Fri Mar 29 20:08:08 PDT 2019
    /home/victoria/Mail/2_RESEARCH - NEWS

time find . -mindepth 1 -type d -print0 | while IFS= read -r -d '' i ; do echo -n $i": " ; ls -p "$i" | grep -v / | wc -l ; done > ../../aaa
    0:00.03

[victoria@victoria 2_RESEARCH - NEWS]$ head -n5 ../../aaa
    ./RNA - Exosomes: 26
    ./Cellular Signaling - Receptors: 213
    ./Catabolism - Autophagy; Phagosomes; Mitophagy: 138
    ./Stress - Physiological, Cellular - General: 261
    ./Ancient DNA; Ancient Protein: 34

[victoria@victoria 2_RESEARCH - NEWS]$ sed -r 's/(^.*): ([0-9]{1,8}$)/\2: \1/g' ../../aaa | sort -V | (head; echo ''; tail)

    0: ./Genomics - Gene Drive
    1: ./Causality; Causal Relationships
    1: ./Cloning
    1: ./GenMAPP 2
    1: ./Pathway Interaction Database
    1: ./Wasps
    2: ./Cellular Signaling - Ras-MAPK Pathway
    2: ./Cell Death - Ferroptosis
    2: ./Diet - Apples
    2: ./Environment - Waste Management

    988: ./Genomics - PPM (Personalized & Precision Medicine)
    1113: ./Microbes - Pathogens, Parasites
    1418: ./Health - Female
    1420: ./Immunity, Inflammation - General
    1522: ./Science, Research - Miscellaneous
    1797: ./Genomics
    1910: ./Neuroscience, Neurobiology
    2740: ./Genomics - Functional
    3943: ./Cancer
    4375: ./Health - Disease 

sort -V是一个自然排序. ...所以，我在这些(claw Mail)目录中的最大文件数量是4375个文件。如果我在每个目录中留下(https://stackoverflow.com/a/55409116/1904943)这些文件名——它们都是以数字命名的，从1开始——并填充到总共5个数字，应该没问题。

齿顶高

查找文件总数，子目录在一个目录。

$ date; pwd
Tue 14 May 2019 04:08:31 PM PDT
/home/victoria/Mail/2_RESEARCH - NEWS

$ ls | head; echo; ls | tail
Acoustics
Ageing
Ageing - Calorie (Dietary) Restriction
Ageing - Senescence
Agriculture, Aquaculture, Fisheries
Ancient DNA; Ancient Protein
Anthropology, Archaeology
Ants
Archaeology
ARO-Relevant Literature, News

Transcriptome - CAGE
Transcriptome - FISSEQ
Transcriptome - RNA-seq
Translational Science, Medicine
Transposons
USACEHR-Relevant Literature
Vaccines
Vision, Eyes, Sight
Wasps
Women in Science, Medicine

$ find . -type f | wc -l
70214    ## files

$ find . -type d | wc -l
417      ## subdirectories

tree $DIR_PATH | tail -1

样例输出:

5309个目录，2122个文件