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如何计算当前目录下的文件数和目录数 # ls -l * |grep "^-"|wc -l ---- to count files # ls -l * |grep "^d"|wc -l ----- to count dir ls -F | grep /$ 或者 alias sub = "ls -F | grep /$"（linux） ls -l | grep "^d" 或者 ls -lL | grep "^d" （Solaris） head -5 /etc/passwd tail -10 /etc/passwd sed -n '5,10p' /etc/passwd 这样你就可以只查看文件的第5行到第10行。
$find . -type f -exec grep "the string you want find…" {} ; -print
.
`--shellp
`--updates
`--wu-ftpd-2.4
| `--doc
| | `--examples
| `--src
| | `--config
| | `--makefiles
| `--support
| | `--makefiles
| | `--man
| `--util
脚本如下：
#!/bin/sh
# dtree: Usage: dtree [any directory]
dir=${1:-.}
（cd $dir; pwd）
find $dir -type d -print | sort -f | sed -e "s,^$1,," -e "/^$/d" -e "s,[^/]*/（[^/]*）$,`----1," -e "s,[^/]*/,| ,g"
cut -d: -f 1 /etc/passwd >; /tmp/users cut -c3-5 /etc/passwd #!/bin/bash # Encrypt file with vim if （test $# -lt 2） then echo Usage: decrypt password filename else vim -e -s -c ":set key=$1" -c ':wq' $2 echo "$2 encrypted." fi [weeder@SMTH weeder]$ for file in *.txt ; do encrypt test $file ; done test2.txt encrypted. test4.txt encrypted. test9.txt encrypted. kick.txt encrypted. echo "$2 encrypted." fi [weeder@SMTH weeder]$ for file in *.txt ; do encrypt test $file ; done test2.txt encrypted. test4.txt encrypted. test9.txt encrypted. kick.txt encrypted. too_old.txt encrypted. too_old_again.txt encrypted. bg5.txt encrypted. [weeder@SMTH weeder]$ program_name |tee logfile alluser: :include:/etc/mail/allusers
awk -F: '$3 >; 100 { print $1 }' /etc/passwd >; /etc/mail/allusers
ldd /bin/ls
echo "---------------"
who | awk '{print $2}'
echo "---------------"
read $TTY
kill -9 ${K}=`ps -t $TTY | grep [0-9] | awk '{print $1}'`
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