第一推是谁做的网站,衡阳市建设网站,网站设计有哪些创新点,南京设计公司在 Linux 系统中#xff0c;nl命令用于计算文件中的行号。它可以将输出的文件内容自动加上行号#xff0c;并且可以通过不同的选项来设置行号的显示方式#xff0c;包括行号的位数、是否自动补齐 0 等。其命令格式为#xff1a;nl(选项)…(文件)…。以下是一些常见的选项nl命令用于计算文件中的行号。它可以将输出的文件内容自动加上行号并且可以通过不同的选项来设置行号的显示方式包括行号的位数、是否自动补齐 0 等。其命令格式为nl(选项)…(文件)…。以下是一些常见的选项 -b指定行号指定的方式主要有两种 -b a表示不论是否为空行也同样列出行号类似cat -n。-b t如果有空行空的那一行不要列出行号默认值。-n列出行号表示的方法主要有三种 -n ln行号在屏幕的最左方显示。-n rn行号在屏幕的最右方显示且行号从 1 开始计数。-n rn行号在屏幕的最右方显示且行号从 0 开始计数。
nl -b t /etc/selinux/config1 # This file controls the state of SELinux on the system.2 # SELINUX can take one of these three values:3 # enforcing - SELinux security policy is enforced.4 # permissive - SELinux prints warnings instead of enforcing.5 # disabled - No SELinux policy is loaded.6 SELINUXenforcing7 # SELINUXTYPE can take one of three values:8 # targeted - Targeted processes are protected,9 # minimum - Modification of targeted policy. Only selected processes are protected.10 # mls - Multi Level Security protection.11 SELINUXTYPEtargetednl -n rz /etc/selinux/config000001 # This file controls the state of SELinux on the system.
000002 # SELINUX can take one of these three values:
000003 # enforcing - SELinux security policy is enforced.
000004 # permissive - SELinux prints warnings instead of enforcing.
000005 # disabled - No SELinux policy is loaded.
000006 SELINUXenforcing
000007 # SELINUXTYPE can take one of three values:
000008 # targeted - Targeted processes are protected,
000009 # minimum - Modification of targeted policy. Only selected processes are protected.
000010 # mls - Multi Level Security protection.
000011 SELINUXTYPEtargeted以下是使用nl命令的一些示例 基本用法 隐藏过程 plaintext (rootcentos79 test3)# cat a.txte38idfae83sggj2ztycgsgsa(rootcentos79 test3)# nl a.txt1 e2 383 i4 d5 f6 a7 e8 839 s10 g11 g12 j13 214 z15 t16 y17 c18 g19 s20 g21 s22 a-n rz选项行号在屏幕的最右方显示且行号从 0 开始计数。 隐藏过程 plaintext (rootcentos79 test3)# cat a.txte38idfae83sggj2ztycgsgsa(rootcentos79 test3)# nl -n rz a.txt0 e1 382 i3 d4 f5 a6 e7 838 s9 g10 g11 j12 213 z14 t15 y16 c17 g18 s19 g20 s21 a-w选项指定行号的宽度。 隐藏过程 plaintext (rootcentos79 test3)# cat a.txte38idfae83sggj2ztycgsgsa(rootcentos79 test3)# nl -n rz a.txt001 e002 38003 i004 d005 f006 a007 e008 83009 s010 g011 g012 j013 2014 z015 t016 y017 c018 g019 s020 g021 s022 a-b选项指定行号的显示方式。 隐藏过程 plaintext (rootcentos79 test3)# cat a.txte38idfae83sggj2ztycgsgsa(rootcentos79 test3)# nl -b a a.txt1 e2 383 i4 d5 f6 a7 e8 839 s10 g11 g12 j13 214 z15 t16 y17 c18 g19 s20 g21 s22 aplaintext (rootcentos79 test3)# cat a.txte38idfae83sggj2ztycgsgsa(rootcentos79 test3)# nl -b t a.txt1 e2 383 i4 d5 f6 a7 e8 839 s10 g11 g12 j13 214 z15 t16 y17 c18 g19 s20 g21 s22 als | nl1 adjtime2 aliases3 aliases.db4 alternatives5 anacrontab6 asound.conf7 audisp8 audit9 bash_completion.d10 bashrcjps -l | nl1 4448 org.apache.zookeeper.server.quorum.QuorumPeerMain2 4622 sun.tools.jps.Jpsps -ef | nl1 UID PID PPID C STIME TTY TIME CMD2 root 1 0 0 19:14 ? 00:00:04 /usr/lib/systemd/systemd --switched-root --s ystem --deserialize 223 root 2 0 0 19:14 ? 00:00:00 [kthreadd]4 root 3 2 0 19:14 ? 00:00:02 [ksoftirqd/0]5 root 5 2 0 19:14 ? 00:00:00 [kworker/0:0H]6 root 7 2 0 19:14 ? 00:00:00 [migration/0]7 root 8 2 0 19:14 ? 00:00:00 [rcu_bh]8 root 9 2 0 19:14 ? 00:00:03 [rcu_sched]ps aux | nl1 USER PID %CPU %MEM VSZ RSS TTY STAT START TIME COMMAND2 root 1 0.3 0.3 128168 6760 ? Ss 19:14 0:04 /usr/lib/systemd/systemd --switched-root --system --deserialize 223 root 2 0.0 0.0 0 0 ? S 19:14 0:00 [kthreadd]4 root 3 0.1 0.0 0 0 ? S 19:14 0:02 [ksoftirqd/0]5 root 5 0.0 0.0 0 0 ? S 19:14 0:00 [kworker/0:0H]6 root 7 0.0 0.0 0 0 ? S 19:14 0:00 [migration/0]7 root 8 0.0 0.0 0 0 ? S 19:14 0:00 [rcu_bh]8 root 9 0.2 0.0 0 0 ? S 19:14 0:03 [rcu_sched]9 root 10 0.0 0.0 0 0 ? S 19:14 0:00 [lru-add-drain]10 root 11 0.2 0.0 0 0 ? S 19:14 0:03 [watchdog/0]
