9月末に発売されたシェル芸本の続きです。いっぱい解いちゃった
前回はこちら
問題103
$ seq 99 | awk '{print "ln hoge "$1}' | bash $ ls -l hoge -rw-r--r-- 100 xztaityozx xztaityozx 2 Dec 13 19:57 hoge
問題104
$ seq inf | while read L; do FN=$(perl -e "print \"a\"x$L"); touch $FN || {echo $L; break}; done touch: cannot touch 'aaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaa': File name too long 256
問題105
$ du -sh /usr/* | sort -k2 | paste - <(du -s /usr/*|sort -k2) | sort -rnk3 | sel -gd\\s+ --remove-empty 1 2 3.7G /usr/lib 689M /usr/share 262M /usr/bin 62M /usr/include 26M /usr/sbin 648K /usr/libexec 88K /usr/local 12K /usr/games 8.0K /usr/config 4.0K /usr/src 4.0K /usr/libx32 4.0K /usr/lib64 4.0K /usr/lib32
問題106
$ ls -l /bin/ | awk '$1~/[^lwrx-]/' total 271308 -rwsr-sr-x 1 daemon daemon 55560 Nov 13 2018 at -rwxr-sr-x 1 root tty 14488 Mar 30 2020 bsd-write -rwxr-sr-x 1 root shadow 84512 Jul 15 07:08 chage -rwsr-xr-x 1 root root 85064 Jul 15 07:08 chfn -rwsr-xr-x 1 root root 53040 Jul 15 07:08 chsh -rwxr-sr-x 1 root crontab 43720 Feb 14 2020 crontab -rwxr-sr-x 1 root shadow 31312 Jul 15 07:08 expiry -rwsr-xr-x 1 root root 39144 Mar 7 2020 fusermount -rwsr-xr-x 1 root root 88464 Jul 15 07:08 gpasswd -rwsr-xr-x 1 root root 55528 Jul 21 2020 mount -rwsr-xr-x 1 root root 44784 Jul 15 07:08 newgrp -rwsr-xr-x 1 root root 68208 Jul 15 07:08 passwd -rwsr-xr-x 1 root root 31032 May 26 2021 pkexec -rwxr-sr-x 1 root ssh 350504 Jul 23 21:55 ssh-agent -rwsr-xr-x 1 root root 67816 Jul 21 2020 su -rwsr-xr-x 1 root root 166056 Jan 19 2021 sudo -rwsr-xr-x 1 root root 39144 Jul 21 2020 umount -rwxr-sr-x 1 root tty 35048 Jul 21 2020 wall
問題107
WSLには /var/log/auth.log が無いらしい。のでさっき sudo systemctl start rsyslog した時のログです
$ grep sudo:session /var/log/auth.log | grep "opened for user" | sel 1 | uniq -c 3 Dec
問題108
# 小問1 $ zcat qdata/108/syslog.gz | grep "Killed process" | sel 10 | tr -d '()' | uniq -c 9 superapp # 小問2 $ zcat qdata/108/syslog.gz | sed -nE 's/invoked oom-killer:.+//gp' | sel 7: | sort | uniq -c | sort -rn 3 apache2 2 gmain 1 tmux: server 1 systemd-network 1 lsb_release 1 apport
問題109
$ cat o | while read L F; do grep "$L" o | sed "s@\$@ $F@"; done | sel 2: --remove-empty | awk '$1!=$2' /etc/subuid /etc/subgid /etc/pki/fwupd/GPG-KEY-Linux-Vendor-Firmware-Service /etc/pki/fwupd-metadata/GPG-KEY-Linux-Vendor-Firmware-Service /etc/pki/fwupd/LVFS-CA.pem /etc/pki/fwupd-metadata/LVFS-CA.pem /etc/pki/fwupd-metadata/GPG-KEY-Linux-Vendor-Firmware-Service /etc/pki/fwupd/GPG-KEY-Linux-Vendor-Firmware-Service /etc/pki/fwupd-metadata/LVFS-CA.pem /etc/pki/fwupd/LVFS-CA.pem /etc/magic.mime /etc/magic /etc/vmware-tools/suspend-vm-default /etc/vmware-tools/poweroff-vm-default /etc/vmware-tools/poweron-vm-default /etc/vmware-tools/poweroff-vm-default /etc/vmware-tools/resume-vm-default /etc/vmware-tools/poweroff-vm-default /etc/vmware-tools/poweroff-vm-default /etc/vmware-tools/suspend-vm-default /etc/vmware-tools/poweron-vm-default /etc/vmware-tools/suspend-vm-default /etc/vmware-tools/resume-vm-default /etc/vmware-tools/suspend-vm-default ...
