awk -F':' ' { printf ( "%-12s %-40s\n", $1, $2 ) } ' /tmp/users.txt #Clean up the temporary file. /bin/rm -f /tmp/users.txt 使用-v 选项执行脚本 $ bash -v listusers.sh list-users-script-output-linux 在上面的输出中,脚本输出与执行的命令混合在一起。但是,使用-v选项,至少...
或者,如果你想要相同数量的小数,你可以使用printf: awk -v m=10 -v OFS="\t" ' FNR%m==1{sum1=0;sum2=0} {sum1+=$1;sum2+=$2} FNR%m==0{printf("%0.9G%s%0.9G\n",sum1/m,OFS,sum2/m); lfnr=FNR; next} END{printf("%0.9G%s%0.9G\n",sum1/(FNR-lfnr),OFS,sum2/(FNR-lf...
559香菜lump Linux 札记 bash篇二引用、echo和printf 寒号鸟 【Bash On Windows】在 Windows Subsystem for Linux(WSL) 上运行任何桌面环境(已达可用阶段) Real... · 发表于微软信仰中心 Linux下安装intel的ifort和mkl库 GelharandDagan 欢迎参与讨论 2 2 是否在知乎 App 内阅读全文 取消确认...
-1.grep -v'^$'regular_express.txt | grep -v'^#'==管线命令 -2.egrep -v'^$|^#'regular_express.txt ==延伸型的正则表达式;egrep也可以使用grep -E替代 延伸型正则表达式的几个特殊符号 5.文件的格式化与相关处理 不需要重新以vim去编辑,通过数据流重导向配合下面介绍的printf功能,以及awk指令 5.1格...
printf "+ %s\n" "${fruits[@]}" # + Apple # + Desert fig # + Plum Within double quotes, ${fruits[@]} expands to a separate argument for each element in the array; whitespace in the array elements is preserved. Array slice Besides, we can extract a slice of array using the sli...
printf [-v var] format [arguments] 类同C的printf,-v类同sprintf。 read [options] [name ...] 读入一行,不保留分隔符。遇到EOF时退出码大于0。 -u fd -d delim -n nchars 用法类同readarray name 行拆分成字存入这些变量里,变量不够时最后一个变量承载剩余的所有字符 -a aname 用索引数组存储字,...
③输出格式 %n 可以将所输出字符串的长度值赋绐一个变量, 见下例: int slen; printf("hello wo...
export NVM_DIR="$([ -z "${XDG_CONFIG_HOME-}" ] && printf %s "${HOME}/.nvm" || printf %s "${XDG_CONFIG_HOME}/nvm")" [ -s "$NVM_DIR/nvm.sh" ] && \. "$NVM_DIR/nvm.sh" # This loads nvmAdditional NotesIf the environment variable $XDG_CONFIG_HOME is present, it will ...
printf "My ${PURPLE}name${NC} is ${RED}BO${NC} \n" Do this in shell, and launch your script, you will get the same from the image in the beginning of this article. By Bo • Posted in bash, Linux, shell • Tagged bash, output with color, shell Nov...
+ grep -v sbin + cut -d : -f1,5,7 /etc/passwd + awk -F: ' { printf ( "%-12s %-40s\n", $1, $2 ) } ' /tmp/users.txt linuxtechi linuxtechi,,, root root + /bin/rm -f /tmp/users.txt $ As we can see that shell has inserted a + sign in front of each command...