UNIX パイプ

dotinstall:~ $ ls -l /etc/ total 208 -rw-r--r-- 1 root root 7 May 29 2020 alpine-release drwxr-xr-x 1 root root 4096 Sep 23 2020 apk drwxr-xr-x 3 root root 4096 Sep 23 2020 ca-certificates -rw-r--r-- 1 root root 5613 Jun 18 2020 ca-certificates.conf drwxr-xr-x 2 root root 4096 May 29 2020 conf.d drwxr-xr-x 2 root root 4096 May 29 2020 crontabs -rw-r--r-- 1 root root 89 May 29 2020 fstab -rw-r--r-- 1 root root 693 Sep 23 2020 group -rw-r--r-- 1 root root 682 May 29 2020 group- -rw-r--r-- 1 root root 13 Dec 27 18:11 hostname -rw-r--r-- 1 root root 178 Dec 27 18:11 hosts drwxr-xr-x 2 root root 4096 May 29 2020 init.d -rw-r--r-- 1 root root 570 May 29 2020 inittab -rw-r--r-- 1 root root 1748 Feb 9 2020 inputrc -rw-r--r-- 1 root root 54 May 29 2020 issue -rw-r--r-- 1 root root 309 Aug 9 2020 localtime drwxr-xr-x 2 root root 4096 May 29 2020 logrotate.d drwxr-xr-x 2 root root 4096 May 29 2020 modprobe.d -rw-r--r-- 1 root root 15 May 29 2020 modules drwxr-xr-x 2 root root 4096 May 29 2020 modules-load.d -rw-r--r-- 1 root root 283 May 29 2020 motd lrwxrwxrwx 1 root root 12 Dec 27 18:11 mtab -> /proc/mounts drwxr-xr-x 8 root root 4096 May 29 2020 network drwxr-xr-x 2 root root 4096 May 29 2020 opt -rw-r--r-- 1 root root 164 May 29 2020 os-release -rw-r--r-- 1 root root 1233 Sep 23 2020 passwd -rw-r--r-- 1 root root 1172 May 29 2020 passwd- drwxr-xr-x 7 root root 4096 May 29 2020 periodic -rw-r--r-- 1 root root 238 May 29 2020 profile drwxr-xr-x 1 root root 4096 Sep 23 2020 profile.d -rw-r--r-- 1 root root 1865 May 29 2020 protocols -rw-r--r-- 1 root root 54 Dec 27 18:11 resolv.conf -rw-r--r-- 1 root root 65 May 22 2020 securetty -rw-r--r-- 1 root root 14464 May 29 2020 services -rw-r----- 1 root shadow 454 Sep 23 2020 shadow -rw-r----- 1 root shadow 422 May 29 2020 shadow- -rw-r--r-- 1 root root 48 Sep 23 2020 shells drwxr-xr-x 1 root root 4096 May 29 2020 ssl -rw-r--r-- 1 root root 3941 May 25 2020 sudo.conf -rw-r--r-- 1 root root 6169 May 25 2020 sudo_logsrvd.conf -rw-r--r-- 1 root root 3228 Sep 23 2020 sudoers drwxr-x--- 2 root root 4096 Sep 23 2020 sudoers.d -r--r----- 1 root root 3174 May 25 2020 sudoers.dist -rw-r--r-- 1 root root 53 May 29 2020 sysctl.conf drwxr-xr-x 2 root root 4096 May 29 2020 sysctl.d drwxr-xr-x 13 root root 4096 Sep 23 2020 terminfo -rw-r--r-- 1 root root 5306 May 22 2020 udhcpd.conf dotinstall:~ $ ls -l /etc/ | grep 'sudo' -rw-r--r-- 1 root root 3941 May 25 2020 sudo.conf -rw-r--r-- 1 root root 6169 May 25 2020 sudo_logsrvd.conf -rw-r--r-- 1 root root 3228 Sep 23 2020 sudoers drwxr-x--- 2 root root 4096 Sep 23 2020 sudoers.d -r--r----- 1 root root 3174 May 25 2020 sudoers.dist dotinstall:~ $ ls -l /etc/ | grep 'sudo' | wc -l 5 dotinstall:~ $ ls -l /etc/ | grep 'sudo' | wc -l > results.txt dotinstall:~ $ cat results.txt 5 dotinstall:~ $ rm results.txt dotinstall:~ $