首页 > 代码库 > bash shell 编程练习
bash shell 编程练习
原始文件：
find /etc -name passwd 2>&1 | tee ee.log
1. cat -n 把 e.log 的文档内容加上行号后输入 e2.log 这个文档里：
xiluhua@localhost ~/t2scripts $ cat -n e.log | tee e2.log 1 /etc/passwd 2 3 4 find: `/etc/ntp/crypto‘: Permission denied 5 find: `/etc/audisp‘: Permission denied 6 find: `/etc/audit‘: Permission denied 7 8 find: `/etc/polkit-1/localauthority‘: Permission denied 9 find: `/etc/dhcp‘: Permission denied 10 /etc/pam.d/passwd 11 find: `/etc/lvm/backup‘: Permission denied 12 find: `/etc/lvm/cache‘: Permission denied 13 find: `/etc/lvm/archive‘: Permission denied 14 find: `/etc/cups/ssl‘: Permission denied 15 find: `/etc/pki/rsyslog‘: Permission denied 16 17 18 19 20 21 22 find: `/etc/pki/CA/private‘: Permission denied 23 find: `/etc/vmware-tools/GuestProxyData/trusted‘: Permission denied 24 find: `/etc/sudoers.d‘: Permission denied 25 find: `/etc/selinux/targeted/modules/active‘: Permission denied
2. cat -b 把 textfile1 和 textfile2 的文档内容加上行号（空白行不加）之后将内容附加到 textfile3 文档里：
xiluhua@localhost ~/t2scripts $ cat -b e.log | tee e3.log 1 /etc/passwd 2 find: `/etc/ntp/crypto‘: Permission denied 3 find: `/etc/audisp‘: Permission denied 4 find: `/etc/audit‘: Permission denied 5 find: `/etc/polkit-1/localauthority‘: Permission denied 6 find: `/etc/dhcp‘: Permission denied 7 /etc/pam.d/passwd 8 find: `/etc/lvm/backup‘: Permission denied 9 find: `/etc/lvm/cache‘: Permission denied 10 find: `/etc/lvm/archive‘: Permission denied 11 find: `/etc/cups/ssl‘: Permission denied 12 find: `/etc/pki/rsyslog‘: Permission denied 13 find: `/etc/pki/CA/private‘: Permission denied 14 find: `/etc/vmware-tools/GuestProxyData/trusted‘: Permission denied 15 find: `/etc/sudoers.d‘: Permission denied 16 find: `/etc/selinux/targeted/modules/active‘: Permission denied
3. cat /dev/null 清空 ee.log 文档内容：
cat /dev/null > e3.log 4. chattr +i：不得任意更动文件或目录。
root@localhost /home/xiluhua/t2scripts $ chattr +i ttt.sh $ 加了 +i 之后，root权限也删不了了root@localhost /home/xiluhua/t2scripts $ rm -rf ttt.sh rm: cannot remove `ttt.sh‘: Operation not permitted
5. chgrp (1)
root@localhost /home/xiluhua/t2scripts # touch ttt.shroot@localhost /home/xiluhua/t2scripts # ll ttt.sh -rw-r--r--. 1 root root 0 Jan 15 15:22 ttt.shroot@localhost /home/xiluhua/t2scripts # chgrp xiluhua ttt.sh root@localhost /home/xiluhua/t2scripts # ll ttt.sh -rw-r--r--. 1 root xiluhua 0 Jan 15 15:22 ttt.sh
6. chgrp (2)
bash shell 编程练习
声明：以上内容来自用户投稿及互联网公开渠道收集整理发布，本网站不拥有所有权，未作人工编辑处理，也不承担相关法律责任，若内容有误或涉及侵权可进行投诉： 投诉/举报 工作人员会在5个工作日内联系你，一经查实，本站将立刻删除涉嫌侵权内容。