字符串
运维人员/系统管理员每天要在终端敲入大量命令，也要修改查看大量文本配置文件，日志信息。 甚至可以夸张一点说Linux/Unix system admin的全部工作就是和字符串打交道。 binary 大家都知道文本文件是字符串组成的，其实二进制文件里面其实也包含了很多字符串： 1 2 3 4 5 6 7 8 9 10 11 12 13 14 ➜ infra-api git:(dev) file infra-api infra-api: Mach-O 64-bit executable x86_64 ➜ infra-api git:(dev) strings infra-api | head flag hash mime path sort sync time *int AAAA Addr ➜ infra-api git:(dev) 命令 收集一些常用的shell 字符串操作命令 cut 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 ❯ tldr cut Cut out fields from stdin or files. More information: https://www.gnu.org/software/coreutils/cut. - Cut out the first sixteen characters of each line of stdin: cut -c 1-16 - Cut out the first sixteen characters of each line of the given files: cut -c 1-16 file - Cut out everything from the 3rd character to the end of each line: cut -c 3- - Cut out the fifth field of each line, using a colon as a field delimiter (default delimiter is tab): cut -d':' -f5 - Cut out the 2nd and 10th fields of each line, using a semicolon as a delimiter: cut -d';' -f2,10 - Cut out the fields 3 through to the end of each line, using a space as a delimiter: cut -d' ' -f3- cat/less cat，主要有三大使用场景： ...