fold命令用于限制文件列宽
发布时间：2023-06-15 12:01:17 所属栏目：Linux 来源：转载
导读： Linux常用命令fold命令用于限制文件列宽，fold指令会从指定的文件里读取内容，将超过限定列宽的列加入增列字符后，输出到标准输出设备，下面为大家分享一下Linux常用命令fold命令具体使
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Linux常用命令fold命令用于限制文件列宽，fold指令会从指定的文件里读取内容，将超过限定列宽的列加入增列字符后，输出到标准输出设备，下面为大家分享一下Linux常用命令fold命令具体使用方法。 语法 fold [-bs][-w][--help][--version][文件...] 参数： -b或–bytes 以Byte为单位计算列宽，而非采用行数编号为单位。 -s或–spaces 以空格字符作为换列点。 -w或–width 设置每列的最大行数。 –help 在线帮助。 –version 显示版本信息。 实例 将一个名为testfile 的文件的行折叠成宽度为30，可使用如下命令： fold -w 30 testfile 为了对比，先将testfile文件输出如下： $ cat testfile #查看testfile 中的内容 Linux networks are becoming more and more common, but security is often an overlooked issue. Unfortunately, in today’s environment all networks are potential hacker targets, from top-secret military research networks to small home LANs. Linux Network Security focuses on securing Linux in a networked environment, where the security of the entire network needs to be considered rather than just isolated machines. It uses a mix of theory and practical techniques to teach administrators how to install and use security applications, as well as how the applications work and why they are necessary. 然后使用fold命令折叠显示： $ fold -w 30 testfile #行折叠成宽度为30，显示testfile 文件 Linux networks are becoming mo re and more common, but securi ty is often an overlooked issu e. Unfortunately, in today’s environment all networks are potential hacker targets, from top-secret military research networks to small home LANs. Linux Network Security focuses on securing Linux in a networ ked environment, where the sec urity of the entire network ne eds to be considered rather th an just isolated machines. It uses a mix of theory and pract ical techniques to teach admin istrators how to install and u se security applications, as w ell as how the applications wo rk and why they are necessary （编辑：PHP编程网 - 黄冈站长网） 【声明】本站内容均来自网络，其相关言论仅代表作者个人观点，不代表本站立场。若无意侵犯到您的权利，请及时与联系站长删除相关内容! |
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