在Bash 中删除多个字符串中的重复单词,可以使用 awk 命令结合数组来实现。以下是一个示例命令: 代码语言:txt 复制 echo "apple banana apple orange banana" | awk '{for(i=1;i<=NF;i++)if(!seen[$i]++)printf("%s ",$i)}' 解释: echo "apple banana apple orange
${foo%suffix} Remove suffix ${foo#prefix} Remove prefix — — ${foo%%suffix} Remove long suffix ${foo##prefix} Remove long prefix — — ${foo/from/to} Replace first match ${foo//from/to} Replace all — — ${foo/%from/to} Replace suffix ${foo/#from/to} Replace prefixComments...
-r filename 档案可读取 -w filename 档案可写入 -x filename 档案可执行 -f filename 档案为一般档 -d filename 档案为目录 -s filename 档案为非空的一般档 test -r "$filename" -a -s "$filename" --- [root@192 ~]# bash Test.sh True [root@192 ~]# cat Test.sh string1=1 string2...
1. bash builtin commands(fedora38-GNU Bash 5.2) BASH_BUILTINS(1) General Commands Manual BASH_BUILTINS(1)23NAME4:, ., [, alias, bg, bind, break, builtin, caller, cd, command, compgen, complete, compopt, continue, declare, dirs, disown,echo,5enable, eval, exec, exit, export,false...
${FOO%suffix} # Remove suffix ${FOO#prefix} # Remove prefix ${FOO%%suffix} # Remove long suffix ${FOO##prefix} # Remove long prefix STR="/path/to/foo.cpp" echo ${STR%.cpp} # /path/to/foo echo ${STR%.cpp}.o # /path/to/foo.o echo ${STR%/*} # /path/to echo $...
Bash reads and executes commands from this file, then exits. Bash's exit status is the exit status of the last command executed in the script. If no commands are executed, the exit status is 0. An attempt is first made to open the file in the current directory, and, if no file is...
For example, if I run the above example by removing the file name, here’s what it will yield. basename /home/user/data data Remove file extension with suffix The primary use of the basename command is in extracting the file name from the file path. You can also remove the file extensi...
${FOO%suffix}Remove suffix ${FOO#prefix}Remove prefix ${FOO%%suffix}Remove long suffix ${FOO##prefix}Remove long prefix ${FOO/from/to}Replace first match ${FOO//from/to}Replace all ${FOO/%from/to}Replace suffix ${FOO/#from/to}Replace prefix ...
Checks they're exact duplicates of a matching basename file without the (N) suffix with the exact same checksum for safety. Prompts to delete per file. To auto-accept deletions, do yes | delete_duplicate_files.sh. This is a fast way of cleaning up your ~/Downloads directory and can be...
Then, we used the basename command to retrieve the filename from the specified path while "${filename%.*}" was the parameter expansion, used to remove the file extension from the given path. How? In "${filename%.*}", the % operator eliminated the shortest matching suffix from the ...