# 第四部分 命令

掌握 Linux 命令是编写有效的 shell 脚本必不可少的序曲。

本章节涉及了下列的命令：

* [`.`](https://wiki.clay-wangzhi.com/shell/part4)（参照 [`source`](https://wiki.clay-wangzhi.com/shell/part4)）
* [`ac`](https://wiki.clay-wangzhi.com/shell/part4)
* [`adduser`](https://wiki.clay-wangzhi.com/shell/part4)
* [`agetty`](https://wiki.clay-wangzhi.com/shell/part4)
* [`agrep`](https://wiki.clay-wangzhi.com/shell/part4)
* [`ar`](https://wiki.clay-wangzhi.com/shell/part4)
* [`arch`](https://wiki.clay-wangzhi.com/shell/part4)
* [`at`](https://wiki.clay-wangzhi.com/shell/part4)
* [`autoload`](https://wiki.clay-wangzhi.com/shell/part4)
* [`awk`](https://wiki.clay-wangzhi.com/shell/part4)（参考 [使用 `awk` 进行数学运算](https://wiki.clay-wangzhi.com/shell/part4)）
* [`badblocks`](https://wiki.clay-wangzhi.com/shell/part4)
* [`banner`](https://wiki.clay-wangzhi.com/shell/part4)
* [`basename`](https://wiki.clay-wangzhi.com/shell/part4)
* [`batch`](https://wiki.clay-wangzhi.com/shell/part4)
* [`bc`](https://wiki.clay-wangzhi.com/shell/part4)
* [`bg`](https://wiki.clay-wangzhi.com/shell/part4)
* [`bind`](https://wiki.clay-wangzhi.com/shell/part4)
* [`bison`](https://wiki.clay-wangzhi.com/shell/part4)
* [`builtin`](https://wiki.clay-wangzhi.com/shell/part4)
* [`bzgrep`](https://wiki.clay-wangzhi.com/shell/part4)
* [`bzip2`](https://wiki.clay-wangzhi.com/shell/part4)
* [`cal`](https://wiki.clay-wangzhi.com/shell/part4)
* [`caller`](https://wiki.clay-wangzhi.com/shell/part4)
* [`cat`](https://wiki.clay-wangzhi.com/shell/part4)
* [`cd`](https://wiki.clay-wangzhi.com/shell/part4)
* [`chattr`](https://wiki.clay-wangzhi.com/shell/part4)
* [`chfn`](https://wiki.clay-wangzhi.com/shell/part4)
* [`chgrp`](https://wiki.clay-wangzhi.com/shell/part4)
* [`chkconfig`](https://wiki.clay-wangzhi.com/shell/part4)
* [`chmod`](https://wiki.clay-wangzhi.com/shell/part4)
* [`chown`](https://wiki.clay-wangzhi.com/shell/part4)
* [`chroot`](https://wiki.clay-wangzhi.com/shell/part4)
* [`cksum`](https://wiki.clay-wangzhi.com/shell/part4)
* [`clear`](https://wiki.clay-wangzhi.com/shell/part4)
* [`clock`](https://wiki.clay-wangzhi.com/shell/part4)
* [`cmp`](https://wiki.clay-wangzhi.com/shell/part4)
* [`col`](https://wiki.clay-wangzhi.com/shell/part4)
* [`colrm`](https://wiki.clay-wangzhi.com/shell/part4)
* [`column`](https://wiki.clay-wangzhi.com/shell/part4)
* [`comm`](https://wiki.clay-wangzhi.com/shell/part4)
* [`command`](https://wiki.clay-wangzhi.com/shell/part4)
* [`compgen`](https://wiki.clay-wangzhi.com/shell/part4)
* [`complete`](https://wiki.clay-wangzhi.com/shell/part4)
* [`compress`](https://wiki.clay-wangzhi.com/shell/part4)
* [`coproc`](https://wiki.clay-wangzhi.com/shell/part4)
* [`cp`](https://wiki.clay-wangzhi.com/shell/part4)
* [`cpio`](https://wiki.clay-wangzhi.com/shell/part4)
* [`cron`](https://wiki.clay-wangzhi.com/shell/part4)
* [`crypt`](https://wiki.clay-wangzhi.com/shell/part4)
* [`csplit`](https://wiki.clay-wangzhi.com/shell/part4)
* [`cu`](https://wiki.clay-wangzhi.com/shell/part4)
* [`cut`](https://wiki.clay-wangzhi.com/shell/part4)
* [`date`](https://wiki.clay-wangzhi.com/shell/part4)
* [`dc`](https://wiki.clay-wangzhi.com/shell/part4)
* [`dd`](https://wiki.clay-wangzhi.com/shell/part4)
* [`debugfs`](https://wiki.clay-wangzhi.com/shell/part4)
* [`declare`](https://wiki.clay-wangzhi.com/shell/part4)
* [`depmod`](https://wiki.clay-wangzhi.com/shell/part4)
* [`df`](https://wiki.clay-wangzhi.com/shell/part4)
* [`dialog`](https://wiki.clay-wangzhi.com/shell/part4)
* [`diff`](https://wiki.clay-wangzhi.com/shell/part4)
* [`diff3`](https://wiki.clay-wangzhi.com/shell/part4)
* [`diffstat`](https://wiki.clay-wangzhi.com/shell/part4)
* [`dig`](https://wiki.clay-wangzhi.com/shell/part4)
* [`dirname`](https://wiki.clay-wangzhi.com/shell/part4)
* [`dirs`](https://wiki.clay-wangzhi.com/shell/part4)
* [`disown`](https://wiki.clay-wangzhi.com/shell/part4)
* [`dmesg`](https://wiki.clay-wangzhi.com/shell/part4)
* [`doexec`](https://wiki.clay-wangzhi.com/shell/part4)
* [`dos2unix`](https://wiki.clay-wangzhi.com/shell/part4)
* [`du`](https://wiki.clay-wangzhi.com/shell/part4)
* [`dump`](https://wiki.clay-wangzhi.com/shell/part4)
* [`dumpe2fs`](https://wiki.clay-wangzhi.com/shell/part4)
* [`e2fsck`](https://wiki.clay-wangzhi.com/shell/part4)
* [`echo`](https://wiki.clay-wangzhi.com/shell/part4)
* [`egrep`](https://wiki.clay-wangzhi.com/shell/part4)
* [`enable`](https://wiki.clay-wangzhi.com/shell/part4)
* [`enscript`](https://wiki.clay-wangzhi.com/shell/part4)
* [`env`](https://wiki.clay-wangzhi.com/shell/part4)
* [`eqn`](https://wiki.clay-wangzhi.com/shell/part4)
* [`eval`](https://wiki.clay-wangzhi.com/shell/part4)
* [`exec`](https://wiki.clay-wangzhi.com/shell/part4)
* [`exit`](https://wiki.clay-wangzhi.com/shell/part4)（相关话题：[退出状态](https://wiki.clay-wangzhi.com/shell/part4)）
* [`expand`](https://wiki.clay-wangzhi.com/shell/part4)
* [`export`](https://wiki.clay-wangzhi.com/shell/part4)
* [`expr`](https://wiki.clay-wangzhi.com/shell/part4)
* [`factor`](https://wiki.clay-wangzhi.com/shell/part4)
* [`false`](https://wiki.clay-wangzhi.com/shell/part4)
* [`fdformat`](https://wiki.clay-wangzhi.com/shell/part4)
* [`fdisk`](https://wiki.clay-wangzhi.com/shell/part4)
* [`fg`](https://wiki.clay-wangzhi.com/shell/part4)
* [`fgrep`](https://wiki.clay-wangzhi.com/shell/part4)
* [`file`](https://wiki.clay-wangzhi.com/shell/part4)
* [`find`](https://wiki.clay-wangzhi.com/shell/part4)
* [`finger`](https://wiki.clay-wangzhi.com/shell/part4)
* [`flex`](https://wiki.clay-wangzhi.com/shell/part4)
* [`flock`](https://wiki.clay-wangzhi.com/shell/part4)
* [`fmt`](https://wiki.clay-wangzhi.com/shell/part4)
* [`fold`](https://wiki.clay-wangzhi.com/shell/part4)
* [`free`](https://wiki.clay-wangzhi.com/shell/part4)
* [`fsck`](https://wiki.clay-wangzhi.com/shell/part4)
* [`ftp`](https://wiki.clay-wangzhi.com/shell/part4)
* [`fuser`](https://wiki.clay-wangzhi.com/shell/part4)
* [`getfacl`](https://wiki.clay-wangzhi.com/shell/part4)
* [`getopt`](https://wiki.clay-wangzhi.com/shell/part4)
* [`getopts`](https://wiki.clay-wangzhi.com/shell/part4)
* [`gettext`](https://wiki.clay-wangzhi.com/shell/part4)
* [`getty`](https://wiki.clay-wangzhi.com/shell/part4)
* [`gnome-mount`](https://wiki.clay-wangzhi.com/shell/part4)
* [`grep`](https://wiki.clay-wangzhi.com/shell/part4)
* [`groff`](https://wiki.clay-wangzhi.com/shell/part4)
* [`groupmod`](https://wiki.clay-wangzhi.com/shell/part4)
* [`groups`](https://wiki.clay-wangzhi.com/shell/part4)（相关话题：变量 [`$GROUPS`](https://wiki.clay-wangzhi.com/shell/part4)）
* [`gs`](https://wiki.clay-wangzhi.com/shell/part4)
* [`gzip`](https://wiki.clay-wangzhi.com/shell/part4)
* [`halt`](https://wiki.clay-wangzhi.com/shell/part4)
* [`hash`](https://wiki.clay-wangzhi.com/shell/part4)
* [`hdparm`](https://wiki.clay-wangzhi.com/shell/part4)
* [`head`](https://wiki.clay-wangzhi.com/shell/part4)
* [`help`](https://wiki.clay-wangzhi.com/shell/part4)
* [`hexdump`](https://wiki.clay-wangzhi.com/shell/part4)
* [`host`](https://wiki.clay-wangzhi.com/shell/part4)
* [`hostid`](https://wiki.clay-wangzhi.com/shell/part4)
* [`hostname`](https://wiki.clay-wangzhi.com/shell/part4)（相关话题：变量 [`$HOSTNAME`](https://wiki.clay-wangzhi.com/shell/part4)）
* [`hwclock`](https://wiki.clay-wangzhi.com/shell/part4)
* [`iconv`](https://wiki.clay-wangzhi.com/shell/part4)
* [`id`](https://wiki.clay-wangzhi.com/shell/part4)（相关话题：变量 [`$UID`](https://wiki.clay-wangzhi.com/shell/part4)）
* [`ifconfig`](https://wiki.clay-wangzhi.com/shell/part4)
* [`info`](https://wiki.clay-wangzhi.com/shell/part4)
* [`infocmp`](https://wiki.clay-wangzhi.com/shell/part4)
* [`init`](https://wiki.clay-wangzhi.com/shell/part4)
* [`insmod`](https://wiki.clay-wangzhi.com/shell/part4)
* [`install`](https://wiki.clay-wangzhi.com/shell/part4)
* [`ip`](https://wiki.clay-wangzhi.com/shell/part4)
* [`ipcalc`](https://wiki.clay-wangzhi.com/shell/part4)
* [`iptables`](https://wiki.clay-wangzhi.com/shell/part4)
* [`iwconfig`](https://wiki.clay-wangzhi.com/shell/part4)
* [`jobs`](https://wiki.clay-wangzhi.com/shell/part4)
* [`join`](https://wiki.clay-wangzhi.com/shell/part4)
* [`jot`](https://wiki.clay-wangzhi.com/shell/part4)
* [`kill`](https://wiki.clay-wangzhi.com/shell/part4)
* [`killall`](https://wiki.clay-wangzhi.com/shell/part4)
* [`last`](https://wiki.clay-wangzhi.com/shell/part4)
* [`lastcomm`](https://wiki.clay-wangzhi.com/shell/part4)
* [`lastlog`](https://wiki.clay-wangzhi.com/shell/part4)
* [`ldd`](https://wiki.clay-wangzhi.com/shell/part4)
* [`less`](https://wiki.clay-wangzhi.com/shell/part4)
* [`let`](https://wiki.clay-wangzhi.com/shell/part4)
* [`lex`](https://wiki.clay-wangzhi.com/shell/part4)
* [`lid`](https://wiki.clay-wangzhi.com/shell/part4)
* [`ln`](https://wiki.clay-wangzhi.com/shell/part4)
* [`locate`](https://wiki.clay-wangzhi.com/shell/part4)
* [`lockfile`](https://wiki.clay-wangzhi.com/shell/part4)
* [`logger`](https://wiki.clay-wangzhi.com/shell/part4)
* [`logname`](https://wiki.clay-wangzhi.com/shell/part4)
* [`logout`](https://wiki.clay-wangzhi.com/shell/part4)
* [`logrotate`](https://wiki.clay-wangzhi.com/shell/part4)
* [`look`](https://wiki.clay-wangzhi.com/shell/part4)
* [`losetup`](https://wiki.clay-wangzhi.com/shell/part4)
* [`lp`](https://wiki.clay-wangzhi.com/shell/part4)
* [`ls`](https://wiki.clay-wangzhi.com/shell/part4)
* [`lsdev`](https://wiki.clay-wangzhi.com/shell/part4)
* [`lsmod`](https://wiki.clay-wangzhi.com/shell/part4)
* [`lsof`](https://wiki.clay-wangzhi.com/shell/part4)
* [`lspci`](https://wiki.clay-wangzhi.com/shell/part4)
* [`lsusb`](https://wiki.clay-wangzhi.com/shell/part4)
* [`ltrace`](https://wiki.clay-wangzhi.com/shell/part4)
* [`lynx`](https://wiki.clay-wangzhi.com/shell/part4)
* [`lzcat`](https://wiki.clay-wangzhi.com/shell/part4)
* [`lzma`](https://wiki.clay-wangzhi.com/shell/part4)
* [`m4`](https://wiki.clay-wangzhi.com/shell/part4)
* [`mail`](https://wiki.clay-wangzhi.com/shell/part4)
* [`mailstats`](https://wiki.clay-wangzhi.com/shell/part4)
* [`mailto`](https://wiki.clay-wangzhi.com/shell/part4)
* [`make`](https://wiki.clay-wangzhi.com/shell/part4)
* [`MAKEDEV`](https://wiki.clay-wangzhi.com/shell/part4)
* [`man`](https://wiki.clay-wangzhi.com/shell/part4)
* [`mapfile`](https://wiki.clay-wangzhi.com/shell/part4)
* [`mcookie`](https://wiki.clay-wangzhi.com/shell/part4)
* [`md5sum`](https://wiki.clay-wangzhi.com/shell/part4)
* [`merge`](https://wiki.clay-wangzhi.com/shell/part4)
* [`mesg`](https://wiki.clay-wangzhi.com/shell/part4)
* [`mimencode`](https://wiki.clay-wangzhi.com/shell/part4)
* [`mkbootdisk`](https://wiki.clay-wangzhi.com/shell/part4)
* [`mkdir`](https://wiki.clay-wangzhi.com/shell/part4)
* [`mkdosfs`](https://wiki.clay-wangzhi.com/shell/part4)
* [`mke2fs`](https://wiki.clay-wangzhi.com/shell/part4)
* [`mkfifo`](https://wiki.clay-wangzhi.com/shell/part4)
* [`mkisofs`](https://wiki.clay-wangzhi.com/shell/part4)
* [`mknod`](https://wiki.clay-wangzhi.com/shell/part4)
* [`mkswap`](https://wiki.clay-wangzhi.com/shell/part4)
* [`mktemp`](https://wiki.clay-wangzhi.com/shell/part4)
* [`mmencode`](https://wiki.clay-wangzhi.com/shell/part4)
* [`modinfo`](https://wiki.clay-wangzhi.com/shell/part4)
* [`modprobe`](https://wiki.clay-wangzhi.com/shell/part4)
* [`more`](https://wiki.clay-wangzhi.com/shell/part4)
* [`mount`](https://wiki.clay-wangzhi.com/shell/part4)
* [`msgfmt`](https://wiki.clay-wangzhi.com/shell/part4)
* [`mv`](https://wiki.clay-wangzhi.com/shell/part4)
* [`nc`](https://wiki.clay-wangzhi.com/shell/part4)
* [`netconfig`](https://wiki.clay-wangzhi.com/shell/part4)
* [`netstat`](https://wiki.clay-wangzhi.com/shell/part4)
* [`newgrp`](https://wiki.clay-wangzhi.com/shell/part4)
* [`nice`](https://wiki.clay-wangzhi.com/shell/part4)
* [`nl`](https://wiki.clay-wangzhi.com/shell/part4)
* [`nm`](https://wiki.clay-wangzhi.com/shell/part4)
* [`nmap`](https://wiki.clay-wangzhi.com/shell/part4)
* [`nohup`](https://wiki.clay-wangzhi.com/shell/part4)
* [`nslookup`](https://wiki.clay-wangzhi.com/shell/part4)
* [`objdump`](https://wiki.clay-wangzhi.com/shell/part4)
* [`od`](https://wiki.clay-wangzhi.com/shell/part4)
* [`openssl`](https://wiki.clay-wangzhi.com/shell/part4)
* [`passwd`](https://wiki.clay-wangzhi.com/shell/part4)
* [`paste`](https://wiki.clay-wangzhi.com/shell/part4)
* [`patch`](https://wiki.clay-wangzhi.com/shell/part4)（相关话题：[`diff`](https://wiki.clay-wangzhi.com/shell/part4)）
* [`pathchk`](https://wiki.clay-wangzhi.com/shell/part4)
* [`pax`](https://wiki.clay-wangzhi.com/shell/part4)
* [`pgrep`](https://wiki.clay-wangzhi.com/shell/part4)
* [`pidof`](https://wiki.clay-wangzhi.com/shell/part4)
* [`ping`](https://wiki.clay-wangzhi.com/shell/part4)
* [`pkill`](https://wiki.clay-wangzhi.com/shell/part4)
* [`popd`](https://wiki.clay-wangzhi.com/shell/part4)
* [`pr`](https://wiki.clay-wangzhi.com/shell/part4)
* [`printenv`](https://wiki.clay-wangzhi.com/shell/part4)
* [`printf`](https://wiki.clay-wangzhi.com/shell/part4)
* [`procinfo`](https://wiki.clay-wangzhi.com/shell/part4)
* [`ps`](https://wiki.clay-wangzhi.com/shell/part4)
* [`pstree`](https://wiki.clay-wangzhi.com/shell/part4)
* [`ptx`](https://wiki.clay-wangzhi.com/shell/part4)
* [`pushd`](https://wiki.clay-wangzhi.com/shell/part4)
* [`pwd`](https://wiki.clay-wangzhi.com/shell/part4)（相关话题：变量 [`$PWD`](https://wiki.clay-wangzhi.com/shell/part4)）
* [`quota`](https://wiki.clay-wangzhi.com/shell/part4)
* [`rcp`](https://wiki.clay-wangzhi.com/shell/part4)
* [`rdev`](https://wiki.clay-wangzhi.com/shell/part4)
* [`rdist`](https://wiki.clay-wangzhi.com/shell/part4)
* [`read`](https://wiki.clay-wangzhi.com/shell/part4)
* [`readelf`](https://wiki.clay-wangzhi.com/shell/part4)
* [`readlink`](https://wiki.clay-wangzhi.com/shell/part4)
* [`readonly`](https://wiki.clay-wangzhi.com/shell/part4)
* [`reboot`](https://wiki.clay-wangzhi.com/shell/part4)
* [`recode`](https://wiki.clay-wangzhi.com/shell/part4)
* [`renice`](https://wiki.clay-wangzhi.com/shell/part4)
* [`reset`](https://wiki.clay-wangzhi.com/shell/part4)
* [`resize`](https://wiki.clay-wangzhi.com/shell/part4)
* [`restore`](https://wiki.clay-wangzhi.com/shell/part4)
* [`rev`](https://wiki.clay-wangzhi.com/shell/part4)
* [`rlogin`](https://wiki.clay-wangzhi.com/shell/part4)
* [`rm`](https://wiki.clay-wangzhi.com/shell/part4)
* [`rmdir`](https://wiki.clay-wangzhi.com/shell/part4)
* [`rmmod`](https://wiki.clay-wangzhi.com/shell/part4)
* [`route`](https://wiki.clay-wangzhi.com/shell/part4)
* [`rpm`](https://wiki.clay-wangzhi.com/shell/part4)
* [`rpm2cpio`](https://wiki.clay-wangzhi.com/shell/part4)
* [`rsh`](https://wiki.clay-wangzhi.com/shell/part4)
* [`rsync`](https://wiki.clay-wangzhi.com/shell/part4)
* [`runlevel`](https://wiki.clay-wangzhi.com/shell/part4)
* [`run-parts`](https://wiki.clay-wangzhi.com/shell/part4)
* [`rx`](https://wiki.clay-wangzhi.com/shell/part4)
* [`rz`](https://wiki.clay-wangzhi.com/shell/part4)
* [`sar`](https://wiki.clay-wangzhi.com/shell/part4)
* [`scp`](https://wiki.clay-wangzhi.com/shell/part4)
* [`script`](https://wiki.clay-wangzhi.com/shell/part4)
* [`sdiff`](https://wiki.clay-wangzhi.com/shell/part4)
* [`sed`](https://wiki.clay-wangzhi.com/shell/part4)
* [`seq`](https://wiki.clay-wangzhi.com/shell/part4)
* [`service`](https://wiki.clay-wangzhi.com/shell/part4)
* [`set`](https://wiki.clay-wangzhi.com/shell/part4)
* [`setfacl`](https://wiki.clay-wangzhi.com/shell/part4)
* [`setquota`](https://wiki.clay-wangzhi.com/shell/part4)
* [`setserial`](https://wiki.clay-wangzhi.com/shell/part4)
* [`setterm`](https://wiki.clay-wangzhi.com/shell/part4)
* [`sha1sum`](https://wiki.clay-wangzhi.com/shell/part4)
* [`shar`](https://wiki.clay-wangzhi.com/shell/part4)
* [`shopt`](https://wiki.clay-wangzhi.com/shell/part4)
* [`shred`](https://wiki.clay-wangzhi.com/shell/part4)
* [`shutdown`](https://wiki.clay-wangzhi.com/shell/part4)
* [`size`](https://wiki.clay-wangzhi.com/shell/part4)
* [`skill`](https://wiki.clay-wangzhi.com/shell/part4)
* [`sleep`](https://wiki.clay-wangzhi.com/shell/part4)
* [`slocate`](https://wiki.clay-wangzhi.com/shell/part4)
* [`snice`](https://wiki.clay-wangzhi.com/shell/part4)
* [`sort`](https://wiki.clay-wangzhi.com/shell/part4)
* [`source`](https://wiki.clay-wangzhi.com/shell/part4)
* [`sox`](https://wiki.clay-wangzhi.com/shell/part4)
* [`split`](https://wiki.clay-wangzhi.com/shell/part4)
* [`sq`](https://wiki.clay-wangzhi.com/shell/part4)
* [`ssh`](https://wiki.clay-wangzhi.com/shell/part4)
* [`stat`](https://wiki.clay-wangzhi.com/shell/part4)
* [`strace`](https://wiki.clay-wangzhi.com/shell/part4)
* [`strings`](https://wiki.clay-wangzhi.com/shell/part4)
* [`strip`](https://wiki.clay-wangzhi.com/shell/part4)
* [`stty`](https://wiki.clay-wangzhi.com/shell/part4)
* [`su`](https://wiki.clay-wangzhi.com/shell/part4)
* [`sudo`](https://wiki.clay-wangzhi.com/shell/part4)
* [`sum`](https://wiki.clay-wangzhi.com/shell/part4)
* [`suspend`](https://wiki.clay-wangzhi.com/shell/part4)
* [`swapoff`](https://wiki.clay-wangzhi.com/shell/part4)
* [`swapon`](https://wiki.clay-wangzhi.com/shell/part4)
* [`sx`](https://wiki.clay-wangzhi.com/shell/part4)
* [`sync`](https://wiki.clay-wangzhi.com/shell/part4)
* [`sz`](https://wiki.clay-wangzhi.com/shell/part4)
* [`tac`](https://wiki.clay-wangzhi.com/shell/part4)
* [`tail`](https://wiki.clay-wangzhi.com/shell/part4)
* [`tar`](https://wiki.clay-wangzhi.com/shell/part4)
* [`tbl`](https://wiki.clay-wangzhi.com/shell/part4)
* [`tcpdump`](https://wiki.clay-wangzhi.com/shell/part4)
* [`tee`](https://wiki.clay-wangzhi.com/shell/part4)
* [`telinit`](https://wiki.clay-wangzhi.com/shell/part4)
* [`telnet`](https://wiki.clay-wangzhi.com/shell/part4)
* [`Tex`](https://wiki.clay-wangzhi.com/shell/part4)
* [`texexec`](https://wiki.clay-wangzhi.com/shell/part4)
* [`time`](https://wiki.clay-wangzhi.com/shell/part4)
* [`times`](https://wiki.clay-wangzhi.com/shell/part4)
* [`tmpwatch`](https://wiki.clay-wangzhi.com/shell/part4)
* [`top`](https://wiki.clay-wangzhi.com/shell/part4)
* [`touch`](https://wiki.clay-wangzhi.com/shell/part4)
* [`tput`](https://wiki.clay-wangzhi.com/shell/part4)
* [`tr`](https://wiki.clay-wangzhi.com/shell/part4)
* [`traceroute`](https://wiki.clay-wangzhi.com/shell/part4)
* [`true`](https://wiki.clay-wangzhi.com/shell/part4)
* [`tset`](https://wiki.clay-wangzhi.com/shell/part4)
* [`tsort`](https://wiki.clay-wangzhi.com/shell/part4)
* [`tty`](https://wiki.clay-wangzhi.com/shell/part4)
* [`tune2fs`](https://wiki.clay-wangzhi.com/shell/part4)
* [`type`](https://wiki.clay-wangzhi.com/shell/part4)
* [`typeset`](https://wiki.clay-wangzhi.com/shell/part4)
* [`ulimit`](https://wiki.clay-wangzhi.com/shell/part4)
* [`umask`](https://wiki.clay-wangzhi.com/shell/part4)
* [`umount`](https://wiki.clay-wangzhi.com/shell/part4)
* [`uname`](https://wiki.clay-wangzhi.com/shell/part4)
* [`unarc`](https://wiki.clay-wangzhi.com/shell/part4)
* [`unarj`](https://wiki.clay-wangzhi.com/shell/part4)
* [`uncompress`](https://wiki.clay-wangzhi.com/shell/part4)
* [`unexpand`](https://wiki.clay-wangzhi.com/shell/part4)
* [`uniq`](https://wiki.clay-wangzhi.com/shell/part4)
* [`units`](https://wiki.clay-wangzhi.com/shell/part4)
* [`unlzma`](https://wiki.clay-wangzhi.com/shell/part4)
* [`unrar`](https://wiki.clay-wangzhi.com/shell/part4)
* [`unset`](https://wiki.clay-wangzhi.com/shell/part4)
* [`unsq`](https://wiki.clay-wangzhi.com/shell/part4)
* [`unzip`](https://wiki.clay-wangzhi.com/shell/part4)
* [`uptime`](https://wiki.clay-wangzhi.com/shell/part4)
* [`usbmodules`](https://wiki.clay-wangzhi.com/shell/part4)
* [`useradd`](https://wiki.clay-wangzhi.com/shell/part4)
* [`userdel`](https://wiki.clay-wangzhi.com/shell/part4)
* [`usermod`](https://wiki.clay-wangzhi.com/shell/part4)
* [`users`](https://wiki.clay-wangzhi.com/shell/part4)
* [`usleep`](https://wiki.clay-wangzhi.com/shell/part4)
* [`uucp`](https://wiki.clay-wangzhi.com/shell/part4)
* [`uudecode`](https://wiki.clay-wangzhi.com/shell/part4)
* [`uuencode`](https://wiki.clay-wangzhi.com/shell/part4)
* [`uux`](https://wiki.clay-wangzhi.com/shell/part4)
* [`vacation`](https://wiki.clay-wangzhi.com/shell/part4)
* [`vdir`](https://wiki.clay-wangzhi.com/shell/part4)
* [`vmstat`](https://wiki.clay-wangzhi.com/shell/part4)
* [`vrfy`](https://wiki.clay-wangzhi.com/shell/part4)
* [`w`](https://wiki.clay-wangzhi.com/shell/part4)
* [`wait`](https://wiki.clay-wangzhi.com/shell/part4)
* [`wall`](https://wiki.clay-wangzhi.com/shell/part4)
* [`watch`](https://wiki.clay-wangzhi.com/shell/part4)
* [`wc`](https://wiki.clay-wangzhi.com/shell/part4)
* [`wget`](https://wiki.clay-wangzhi.com/shell/part4)
* [`whatis`](https://wiki.clay-wangzhi.com/shell/part4)
* [`whereis`](https://wiki.clay-wangzhi.com/shell/part4)
* [`which`](https://wiki.clay-wangzhi.com/shell/part4)
* [`who`](https://wiki.clay-wangzhi.com/shell/part4)
* [`whoami`](https://wiki.clay-wangzhi.com/shell/part4)
* [`whois`](https://wiki.clay-wangzhi.com/shell/part4)
* [`write`](https://wiki.clay-wangzhi.com/shell/part4)
* [`xargs`](https://wiki.clay-wangzhi.com/shell/part4)
* [`xrandr`](https://wiki.clay-wangzhi.com/shell/part4)
* [`xz`](https://wiki.clay-wangzhi.com/shell/part4)
* [`yacc`](https://wiki.clay-wangzhi.com/shell/part4)
* [`yes`](https://wiki.clay-wangzhi.com/shell/part4)
* [`zcat`](https://wiki.clay-wangzhi.com/shell/part4)
* [`zdiff`](https://wiki.clay-wangzhi.com/shell/part4)
* [`zdump`](https://wiki.clay-wangzhi.com/shell/part4)
* [`zegrep`](https://wiki.clay-wangzhi.com/shell/part4)
* [`zfgrep`](https://wiki.clay-wangzhi.com/shell/part4)
* [`zgrep`](https://wiki.clay-wangzhi.com/shell/part4)
* [`zip`](https://wiki.clay-wangzhi.com/shell/part4)

## 目录

* [15. 内建命令](https://wiki.clay-wangzhi.com/shell/part4)
  * [15.1 任务控制命令](https://wiki.clay-wangzhi.com/shell/part4)
* [16. 外部筛选器，任务及命令](https://wiki.clay-wangzhi.com/shell/part4)
  * [16.1 基础命令](https://wiki.clay-wangzhi.com/shell/part4)
  * [16.2 复杂命令](https://wiki.clay-wangzhi.com/shell/part4)
  * [16.3 时间/日期命令](https://wiki.clay-wangzhi.com/shell/part4)
  * [16.4 文本处理命令](https://wiki.clay-wangzhi.com/shell/part4)
  * [16.5 文件与归档命令](https://wiki.clay-wangzhi.com/shell/part4)
  * [16.6 通信命令](https://wiki.clay-wangzhi.com/shell/part4)
  * [16.7 终端控制命令](https://wiki.clay-wangzhi.com/shell/part4)
  * [16.8 数学命令](https://wiki.clay-wangzhi.com/shell/part4)
  * [16.9 其他命令](https://wiki.clay-wangzhi.com/shell/part4)
* [17. 系统与管理命令](https://wiki.clay-wangzhi.com/shell/part4)
  * [17.1 分析一个系统脚本](https://wiki.clay-wangzhi.com/shell/part4)